EUeA?ANUeEEE AeA?AEAAIEE OI?AA?NEOAO

?IAI? ?AAIA O?AIEA

AAIAO IENAIA ?AAAI?AIA

OAeE 548.736.281+669.018

Iio??ei? nenoaie Sc — ?CI oea???ai? i?aea?oie — Si

(oacia? ??aiiaaae, e?enoae?/i? no?oeoo?e oa o?ce/i?

aeanoeaino? niieoe)

02.00.01 — iai?aai?/ia o?i?y

Aaoi?aoa?ao

aeena?oaoe??

ia caeiaoooy iaoeiaiai nooiaiy

eaiaeeaeaoa o?i?/ieo iaoe

Euea?a-1999

Aeena?oaoe??th ? ?oeiien.

?iaioa aeeiiaia ia eaoaae?? iai?aai?/ii? o?i?? Euea?anueeiai
aea?aeaaiiai oi?aa?neoaoo ?iai? ?aaia O?aiea I?i?noa?noaa ina?oe
Oe?a?ie.

IAOEIAEE EA??AIEE

Aeieoi? o?i?/ieo iaoe, i?ioani? eaoaae?e iai?aai?/ii? o?i??

Eioo? Aiaaeai ss?ineaaiae/, i?i?aeoi? c iaoeiai? ?iaioe

Euea?anueeiai aea?aeaaiiai oi?aa?neoaoo ?iai? ?aaia O?aiea

IO?Oe?EI? IIIIAIOE

Aeieoi? o?i?/ieo iaoe, i?ioani? Ia?ao ?aaai THe?eiae/, caa?aeoaa/
eaoaae?e iai?aai?/ii? o?i?? Oaeai?iaenueeiai aea?aeaaiiai oi?aa?neoaoo,
i.Oaeai?iae

Eaiaeeaeao o?i?/ieo iaoe, noa?oee iaoeiaee ni?a?ia?oiee Caaae?e ?ai?
THe?yiiae/, noa?oee iaoeiaee ni?a?ia?oiee O?ceei-iaoai?/iiai ?inoeoooo
?i.A.A.Ea?iaiea IAI Oe?a?ie, i.Euea?a.

I?IA?AeIA ONOAIIAA

?inoeooo i?iaeai iaoa??aeiciaanoaa ?i.?.I.O?aioeaae/a

IAI Oe?a?ie, i.Ee?a

Caoeno a?aeaoaeaoueny “16” aa?aniy 1999 ?ieo i 14 aiae. 00 oa. ia
can?aeaii? niaoe?ae?ciaaii? a/aii? ?aaee Ae 35.051.10 c o?i?/ieo iaoe o
Euea?anueeiio aea?aeaaiiio oi?aa?neoao? ?iai? ?aaia O?aiea ca aae?anith:
290005, i.Euea?a, aoe.Ee?eea ? Iaoiae?y, 6, o?i?/iee oaeoeueoao,
aoaeeoi??y ? 2.

C aeena?oaoe??th iiaeia iciaeiieoenue o iaoeia?e a?ae?ioaoe?
Euea?anueeiai aea?aeaaiiai oi?aa?neoaoo ?iai? ?aaia O?aiea
(aoe.Ae?aaiiaiiaa,5).

Aaoi?aoa?ao ?ic?neaiee ”12” na?iiy 1999 ?.

A/aiee nae?aoa? niaoe?ae?ciaaii? a/aii? ?aaee ss?aiei
C.I.

ANOOI

Aeooaeuei?noue oaie. I?ia?an no/anii? oaoi?ee ia iiaeeeaee aac noai?aiiy
iiaeo iaoa??ae?a, a oiio /ene? iaoae?/ieo. Oiio iniiaiei caaaeaiiyi
iaoa??aeiciaanoaa ? noai?aiiy iaoa??ae?a, ye? aieiae?thoue iaiao?aeieie
o?ceei-o?i?/ieie aeanoeainoyie. Oeae iiooe a?oioo?oueny ia ii?aeiaii?
oai?aoe/ieo oa aenia?eiaioaeueieo ?ic?iaie a aaeoc? o?i?? ? o?ceee
iaoae?a oa nieaa?a .

Aea/aiiy oa?aeoa?o aca?iiae?? eiiiiiaio?a, aeine?aeaeaiiy e?enoae?/ii?
no?oeoo?e ? aeanoeainoae iiaeo niieoe ? iniiaith noai?aiiy iaoa??ae?a c
ye?nii iiaeie oa?aeoa?enoeeaie. Ai?iaaaeaeaiiy oaeeo iaoa??ae?a o
ae?iaieoeoai ? oni?oia ?o aenieoaoaoe?y iiaeeeaa eeoa i?ney aeineiiaeiai
aea/aiiy ?o aeanoeainoae, aieeao ia ethaeeio ? ioi/oth/a na?aaeiaeua.

??aee?niicaiaeuei? iaoaee (?CI), ?o niieoee oa nieaae ca inoaii? ?iee
caaithaaee aaeeea aeciaiiy a iaooe? ? oaoi?oe?. Caaaeyee nai?i
oi?eaeueiei aeanoeainoyi, cie?aia iaai?oiei oa?aeoa?enoeeai,
?ioa?iaoae?/i? niieoee ??aee?niicaiaeueieo aeaiaio?a oa nieaae ia iniia?
?CI ciaeoee canoinoaaiiy a aeaeo?ii?oe?, ?aae?i- oa aeaeo?ioaoi?oe?.

?CI aoaeoeaii aeei?enoiaothoueny a iaoaeo?a??. Aiie i/euothoue ?icieaae,
? oe?iieie eaaoth/eie aeiaaaeaie aei iaoae?a oa nieaa?a, ni?eythoue
iie?auaiith i?e?ino?oeoo?e ? aeanoeainoae, i?aeaeuothoue aea?ino?ee?noue
oa i?oei?noue nieaa?a, ?o aioeei?ic?ei? aeanoeaino? .

Aaaeeeaa canoinoaaiiy ?CI ciaoiaeyoue a eaoae?c?, iniaeeai aeey e?ae?iao
iaooiai? ne?iaeie, ?ciia?ecaoe??, ia?aoai?aiiy aoaeaaiaei?a.
Ia?niaeoeaiei ? aeei?enoaiiy ?CI a yeino? aioeaeaoiiaoi??a cai?noue
oao?aaoeenaeioeth.

Na?aae ?ioeo ?CI Neaiae?e aeae?ey?oueny oe?eaaei ii?aeiaiiyi
o?ceei-o?i?/ieo aeanoeainoae: aeniei? oaiia?aoo?e ieaaeaiiy (1814 E),
iaei? aonoeie (=2,989 a/ni3), aioeei?ic?eiei aieeaii ia nieaae ?CI
oea???ai? i?aea?oie. A?ae ?ioeo ?CI a?i a?ae??ciy?oueny iaioei aoiiiei
?aae?onii (0,164 ii) oa a?aenooi?noth 4f-aeaeo?ii?a. Oae? oa?aeoa?enoeee
?iaeyoue eiai i?eaaaeeaei c oi/ee ci?o ?ic?iaee iiaeo iaoa??ae?a aeey
?aae?iaeaeo?ii?ee oa eini?/ii? oaoi?ee .

Canoinoaaiiy Nee?oe?th oaeiae aaaaoia?aiia. A?i aeei?enoiao?oueny a
nieaaao ia iniia? cae?ca aeey aeaioiaeaiiy ei?ic?eiino?eeeo o?oa, a
aethi?i??aeo oa iaai??aeo nieaaao aeey ae?iaieoeoaa e?oae?a,
i?aeaeuoth/e i?oei?noue oeeo nieaa?a. Aieiaia canoinoaaiiy Nee?oe?th —
ye iniiaiee iai?ai?ia?aeieeiaee iaoa??ae aeey o?aicenoi??a,
i?e?ii?ioeani??a oa ?ioaa?aeueieo noai AII .

Ii?aeiaiiy oeeo eiiiiiaio?a, ye? aieiae?thoue oe?eei ?yaeii oe?iieo
aeanoeainoae, iiaea i?iyaeoeny o aaaaoieiiiiiaioieo nenoaiao ia ?o
iniia? oe?ieei niaeo?ii ??ciiiai?oieo o?ceei-o?i?/ieo aeanoeainoae.

Ca’ycie ?iaioe c iaoeiaeie i?ia?aiaie, ieaiaie, oaiaie. ?iaioa aeeiiaia
o a?aeiia?aeiino? c iaoeiai-oaoi?/ieie i?ia?aiaie I?i?noa?noaa ina?oe
Oe?a?ie ca iaoeiaei iai?yieii 70 “Iaoeia? iniiae o?i?/ii? oaoiieia??
noai?aiiy iiaeo iai?aai?/ieo ?a/iaei oa iaoa??ae?a, eiiieaenii?
o?i?ei-oaoiieia?/ii? ia?a?iaee ne?iaeie Oe?a?ie”.

Iaoa ?iaioe: iiaoaeiaa ?cioa?i?/ieo ia?a??c?a ae?aa?ai noaio nenoai
Sc-La, Pr, Nd-Si i?e 870 E, neioac ?ioa?iaoae?/ieo niieoe oa
anoaiiaeaiiy ?o e?enoae?/ii? no?oeoo?e, aeine?aeaeaiiy aeayeeo ?o
aeanoeainoae, aeyaeaiiy caeiiii??iinoae aca?iiae?? Neaiae?th c ?CI
oea???ai? i?aea?oie oa Nee?oe??i.

Iaoeiaa iiaecia ?iaioe. Aia?oa aea/aii oacia? ??aiiaaae a nenoaiao
Sc-La, Pr, Nd-Si i?e 870 E. Ooi/iaii oacia? ??aiiaaae a iaeano? 50 ao.
% Si a nenoaiao Sc-Ce, Sm-Si i?e 870 E. A nenoaiao Sc-La, Ce, Pr, Nd,
Sm, Gd-Si aeyaeaii ?nioaaiiy 23 oa?ia?ieo niieoe (c ieo 17 — aeyaeaii
aia?oa, i?aeoaa?aeaeaii ?nioaaiiy 6 niieoe). Aeey 16 niieoe anoaiiaeaii
e?enoae?/io no?oeoo?o. Aiie iaeaaeaoue aei 4 no?oeoo?ieo oei?a. Aea/aii
iaai?oi? oa ei?ic?ei? aeanoeaino? ie?aieo oa?ia?ieo niieoe nenoai
Sc-Ce,Pr,Nd,Sm,Gd-Si.

Iaoeiaa ? i?aeoe/ia oe?ii?noue ?iaioe. Iaea?aeai? aenia?eiaioaeuei?
?acoeueoaoe ii ae?aa?aiao noaio nenoai Sc-La,Ce,Pr,Nd,Sm-Si oa
e?enoae?/ieo no?oeoo?ao aeine?aeaeaieo niieoe iiaeooue aooe aeei?enoai?
aeey ?aeaioeo?eaoe?? oac i?e ?ic?iaoe? iiaeo iaoa??ae?a ia iniia? ?CI,
ye aeia?aeieeiaee iaoa??ae aeey niaoe?ae?no?a o aaeoc? e?enoaeio?i?? ?
iaoa??aeiciaanoaa, aeey anoaiiaeaiiy caeiiii??iinoae ooai?aiiy
?ioa?iaoae?/ieo niieoe ? iiooeo iiaeo iaoa??ae?a.

Ai?iaaoe?y ?iaioe. ?acoeueoaoe ?iaioe aoee i?aaenoaaeai? ia VI ia?aae? c
e?enoaeio?i?? iai?aai?/ieo ? eii?aeeiaoe?eieo niieoe (Euea?a, 1992), XIV
Oe?a?inuee?e eiioa?aioe?? c iai?aai?/ii? o?i?? (Ee?a, 1996), Iaoeia?e
eiioa?aioe?? Euea?anueeiai oi?aa?neoaoo (Euea?a, 1996),
iaoeiai-i?aeoe/i?e eiioa?aioe?? “Euea?anuee? o?i?/i? /eoaiiy” (Euea?a,
1997), II I?aeia?iaei?e eiioa?aioe?? “Eiino?oeoe?ei? oa ooieoe?iiaeuei?
iaoa??aee” (Euea?a, 1997).

Ioae?eaoe??. Ii iaoa??aeao aeena?oaoe?? iioae?eiaaii 5 noaoae ? 4 oace.

Iniiai? ?acoeueoaoe, i?aaenoaaeai? aei caoenoo:

-?cioa?i?/i? ia?a??ce ae?aa?ai noaio nenoai Sc-La, Pr, Nd-Si i?e 870 E;

-ooi/iai? o?aaiaioe ia?a??c?a ae?aa?ai noaio nenoai Sc-Ce, Sm-Si i?e 870
E a iaeano? 50 ao.% Si;

-e?enoae?/i? no?oeoo?e 16 niieoe, ye? iaeaaeaoue aei 4 no?oeoo?ieo
oei?a;

-iaai?oi? oa aeaeo?iei?ic?ei? aeanoeaino? ie?aieo oa?ia?ieo niieoe;

-caeiiii??iino? aca?iiae?? eiiiiiaio?a, oiiae ooai?aiiy oa
e?enoaeio?i?/i? iniaeeaino? oa?ia?ieo niieoe nenoai Sc-?CI-Si.

Iniaenoee aianie aeena?oaioa. Iinoaiiaea caaea/? aeine?aeaeaiue
aeeiioaaeanue i?e aaciina?aaei?e o/ano? aeena?oaioa. Aiae?c e?oa?aoo?ieo
aeaieo, aeaioiaeaiiy c?ace?a, aenia?eiaioaeuei? ?iaioe ii
aeine?aeaeaiith aca?iiae?? eiiiiiaio?a a iio??eieo nenoaiao Sc-La, Pr,
Nd-Si, aeine?aeaeaiith i?e?ino?oeoo?e, aecia/aiiy e?enoae?/ii? no?oeoo?e
niieoe, iii??e iaai?oieo oa ei?ic?eieo aeanoeainoae oa iaaiai?aiiy
?acoeueoao?a i?iaaaeai? aaoi?ii aeena?oaoe?? naiino?eii ca?aeii c
aeac?aeaie iaoeiaiai ea??aieea. Ceiiea ianeao ?ioaineaiinoae
iiiie?enoae?a Sc3Pr2Si4 oa Sc1.26Pr3.74Si4 oa ia?aa??ea ?o neeaaeo
aeeiioaaeanue ae.o.i. Eioo?ii A.ss. oa i. ni. Aeae. Ia/aei oa ae-?ii ?.
*a?ie a eaai?aoi??? e?enoaeia?ao?? AEaiaanueeiai oi?aa?neoaoo
(Oaaeoea??y), iiiie?enoaeo Sc3.96Nd1.04Si4 — ae.o.i. Eioo?ii A.ss. oa
ae-?ii I. N?e???oeath a Caa?aanueeiio oi?aa?neoao? (Oi?aao?y),
iiiie?enoaeo ScNd2Si2 — ae-?ii Noaiiaiue-Aeaii TH. a ?inoeooo? iecueeeo
oaiia?aoo? oa no?oeoo?ieo aeine?aeaeaiue IAI (i. A?ioeeaa, Iieueua),
?acoeueoaoe iaaiai?thaaeenue ni?eueii. Aea/aiiy ei?ic?eieo aeanoeainoae
nieaa?a i?iaiaeeeiny o O?ceei-iaoai?/iiio ?inoeooo? ?i. A.A. Ea?iaiea
IAI Oe?a?ie (i. Euea?a) ni?eueii c e.o.i. Neiaiaeyi C.A.

Ia’?i ?iaioe. Aeena?oaoe?y neeaaea?oueny c anooio, 4 ?icae?e?a,
aeniiae?a, nieneo aeei?enoaieo a ?iaio? e?oa?aoo?ieo aeaea?ae ?
aeiaeaoe?a. Aeena?oaoe?y aeeeaaeaia ia 139 noi??ieao, i?noeoue 44
oaaeeoe?, 53 ?enoiee. Nienie aeei?enoaieo e?oa?aoo?ieo aeaea?ae
ia?aoiao? 110 iaca.

CI?NO ?IAIOE

O anooi? iaa?oioiaaii aeooaeuei?noue oaie, iinoaaeaii iaoo oa aecia/aii
caaaeaiiy aeine?aeaeaiue.

A ia?oiio ?icae?e? iiaeaii e?oa?aoo?i? aeai? ii ae?aa?aiao noaio
iiaea?eieo nenoai Sc-La, Sc-Nd, Sc-Si, Pr-Si, Nd-Si oa nii??aeiaieo
iio??eieo nenoai Sc-Ce, Sm, Dy, Er, Lu, Y-Si, a oaeiae Ce-Nd, Sm, Eu,
Gd, Y-Si, Sc-Y, Ce, Nd, Dy-Ge, Ce-Y, La, Gd, Lu- Ge. I?iaaaeaii aiae?c
aca?iiae?? eiiiiiaio?a o nii??aeiaieo nenoaiao. Iienaii no?oeoo?i? oeie,
a yeeo e?enoae?cothoueny a?aeii? a?ia?i? oa oa?ia?i? nee?oeeaee
Neaiae?th.

Iaoiaeeeo aenia?eiaioo iienaii o ae?oaiio ?icae?e?. Aeey i?eaiooaaiiy
nieaa?a aeei?enoiaoaaee eiiiaeoi? iaoaee oaei? /enoioe: neaiae?e —
99,86 ian. %, eaioai — 99,90 ian.%, oea??e — 99,56 ian.%, i?acaiaeei-
99,24 ian.%, iaiaeei — 99,90 ian.%, naia??e — 99,70 ian.%, aaaeie?i?e —
99,80 ian.%, nee?oe?e — 99,99 ian.%.

C?acee aiooaaeenue oeyoii nieaaeyiiy oeooe c aeo?aeieo eiiiiiaio?a a
aeaeo?iaeoaia?e ia/? c i?aeiei aiaeiioieiaeaeoaaiei iiaeii ?
aieueo?aiiaei aeaeo?iaeii a aoiinoa?? i/euaiiai a?aiio i?ae oeneii
0,5105 Ia. A?aii i/euoaaany iiia?aaeiueith ieaaeith aoa/aoiai oeoaio.
Nieaae a?aeiaethaaeenue o aaeooiiaaieo eaa?oeiaeo aiioeao i?e 870 E
i?ioyaii 750 aiaeei o iooaeueieo ia/ao. I?ney aiiiaai?caoe?? aiie
caaa?oiaoaaeenue o oieiaei?e aiae? aac iiia?aaeiueiai ?icaeaaiiy aiioe.

Iniiaiei iaoiaeii i?e iiaoaeia? ?cioa?i?/ieo ia?a??c?a ae?aa?ai noaio
iio??eieo nenoai aoa ?aioaai?anueeee oaciaee aiae?c. A?i i?iaiaeeany ii
ii?ioeia?aiao, ciyoeo o eaia?ao ?EAe-57,3 (CrK-aei?ii?ithaaiiy) ia
aia?aoao O?N-55. Aeey ooi/iaiiy ia??iae?a ?ao?oie niieoe ? aeey
aecia/aiiy oa ooi/iaiiy e?enoae?/ii? no?oeoo?e niieoe aeei?enoiaoaaeeny
ii?ioeia? aeeo?aeoiiao?e Ae?II-2,0 (FeK-aei?ii?ithaaiiy, Si-aioo??oi?e
aoaeii), Ae?II-3I (CuK-aei?ii?ithaaiiy, ceiiea ii oi/eao), Ae?II-4,07
(CuK-aei?ii?ithaaiiy, ceiiea ii oi/eao). Ia??iaee eii??ee ooi/ithaaeenue
ii ii?ioeiaeo aeaieo aeeo?aeoia?ai ca aeiiiiiaith i?ia?aie LATCON ia IE
IBM PC/AT 486. An? ?ic?aooiee, iia’ycai? c ?icoeo?iaeith ? ooi/iaiiyi
no?oeoo? niieoe ii iaoiaeo ii?ioeo i?iaiaeeeenue ia IE IBM PC/AT 486 c
aeiiiiiaith i?ia?ai Rietveld Analysis Program DBWS-9006PC oa Rietveld
Analysis Program DBWS-9411PC. Iiia?aaei? aeine?aeaeaiiy iiiie?enoae?a
i?iaiaeeeenue iaoiaeii Eaoa, iaa?oaiiy (eaia?a ?EA-86,
MoE-aei?ii?ithaaiiy). Iaea?aeaiiy ?icai?oee oa?iaeo e?i?e i?iaiaeeeinue
?aioaaiaii?iiao?e/iei iaoiaeii Aaenaiaa?aa (eaia?a ?AIN-2,
CuK-aei?ii?ithaaiiy). Aeeo?aeoiiao?e/ia aea/aiiy iiiie?enoae?a aeeiiaii
ia aaoiiaoe/ieo aeeo?aeoiiao?ao PHILIPS PW 1100 oa Syntex P1
(MoK-aei?ii?ithaaiiy, a?ao?oiaee iiiio?iiaoi?, =0,7107 ii, /2 — iaoiae
neaioaaiiy). Aeey ooi/iaiiy e?enoae?/ii? no?oeoo?e niieoe
aeei?enoiaoaaeenue i?ia?aie SHELXL-93 , XTAL3.2.

Aeey i?aeoaa?aeaeaiiy ?acoeueoao?a ?aioaaiioaciaiai aiae?co i?iaiaeeee
aeine?aeaeaiiy i?e?ino?oeoo?e ie?aieo c?ace?a (?ano?iaee aeaeo?iiiee
i?e?ineii Tesla-300.)

Iaai?oia ni?eeiyoeea?noue () aei??thaaeanue iaoiaeii Oa?aaeay a iieyo
iai?oaeai?noth aei 0,5O a iaeano? oaiia?aoo? 95-300 E. ?ic?aooiie
aoaeoeaiiai iiiaioa aoii?a (ao.) oa ia?aiaai?oii? oaiia?aoo?e Eth?? (?)
i?iaiaeeany ca aeiiiiiaith IAII ca i?ia?aiith MAGNETIC. Aeey aea/aiiy
aeanoeainoae iaai?oiiaii?yaeeiaaieo nieaa?a aeei?enoiaoaaany
a?a?aoe?eiee iaai?oiiao? (iaai?oia iiea iai?oaeai?noth aei 0,9 IA/i).

Iioaioe?inoaoe/i? aei??thaaiiy i?iaiaeeeeny a o?ueioaeaeo?iaei?e noai? a
aeaeo?io?i?/i?e /a?oioe? c oei?n??aiei aeaeo?iaeii ii??aiyiiy ?
ieaoeiiaei iiey?ecoth/ei aeaeo?iaeii c aeei?enoaiiyi iioaioe?inoaoo
I-5827. ?iai/ee aeaeo?iae yaeya niaith c?acie aeine?aeaeoaaiiai nieaao,
cai?aniaaiee a niieo, yea caoaa?aeea i?e iie?ia?ecaoe??. Iiey?ecaoe?th
cae?enithaaee nooi?i/anoi: nii/aoeo a eaoiaeio, a iio?i, i?ney ca/enoee,
a aiiaeio iaeanoue. Oaeaee?noue ei?ic?? aecia/aeanue a?ao?/iei iaoiaeii
oeyoii aeno?aiieyoe?? oi/ee ia?aoeio i?yiie?i?eieo ae?eyiie aiiaeii? ?
eaoiaeii? e?eaeo ia eiaa?eoi?/io oeaeo no?oio.

O o?aoueiio ?icae?e? iiaeaii ?acoeueoaoe aeine?aeaeaiiy iio??eieo nenoai
Sc-La,Ce,Pr,Nd,Sm-Si i?e 870 E, aea/aiiy e?enoae?/ii? no?oeoo?e
a?eueoino? ciaeaeaieo niieoe, aeine?aeaeaiiy aeayeeo o?ce/ieo
aeanoeainoae ie?aieo oa?ia?ieo cee?oeeae?a.

?ACOEUeOAOE AENIA?EIAIOO

Nenoaia Sc-La-Si (?en.1) aea/aia ia 18 iiaea?eieo ? 68 iio??eieo
nieaaao. I?e 870 E a nenoai? i?aeoaa?aeaeaii ?nioaaiiy ainueie a?aeiieo
?ai?oa a?ia?ieo niieoe La5Si3, La3Si2, La5Si4, LaSi, LaSi1.80-1.67,
LaSi2-1.95, ScSi , Sc5Si3 oa aeaio a?aeiieo ?ai?oa oa?ia?ieo niieoe
ScLaSi , ScLa2Si2. Aeyaeaii ?nioaaiiy ua i’yoe oa?ia?ieo niieoe
(oaae.1). E?enoae?/ia no?oeoo?a aecia/aia aeey /ioe?ueio oa?ia?ieo
niieoe, aeey ?ioeo o?ueio oa?ia?ieo niieoe no?oeoo?a ia anoaiiaeaia.
?ic/eii?noue o?aoueiai eiiiiiaioa a a?ia?ieo niieoeao nenoai Sc-Si oa
La-Si i?aeoe/ii a?aenooiy, ca aeiyoeii niieoee La3Si2, yea ?ic/eiy?
aeecueei 5 ao. % Sn.

?en1. ?cioa?i?/iee ia?a??c ae?aa?aie noaio nenoaie Sc-La-Si i?e 870 E

Nenoaia Sc-Pr-Si (?en.2) aea/aia ia 17 iiaea?eieo ? 91 iio??eiiio
nieaaao. I?e 870 E a nenoai? i?aeoaa?aeaeaii ?nioaaiiy oaeeo a?ia?ieo
niieoe Pr5Si3, Pr5Si4, Pr3Si2, PrSi, PrSi1.8-1.5, PrSi2, ScSi , Sc5Si3
oa oa?ia?ieo niieoe ScPrSi oa ScPr2Si2. Aeyaeaii ?nioaaiiy ua oanoe
oa?ia?ieo niieoe (oaae.1). E?enoae?/ia no?oeoo?a aecia/aia aeey i’yoe
oa?ia?ieo niieoe, aeey ?aooe o?ueio niieoe no?oeoo?a ia anoaiiaeaia.
Niieoea Pr3Si4 ia aeyaeaia.

Ia iniia? niieoee PrSi aeyaeaii oaa?aeee ?ic/ei cai?uaiiy Pr1-xScxSi
(0x0.2) i?e iino?eiiio ai?no? Si — 50 ao.%. Ia iniia? niieoee Pr3Si2
aeyaeaii oaa?aeee ?ic/ei i?ioyaei?noth 17 ao.% Sc.

Nenoaia Sc-Nd-Si (?en.3) aea/aia ia 23 iiaea?eieo ? 107 iio??eieo
nieaaao. I?e 870 E a nenoai? i?aeoaa?aeaeaii ?nioaaiiy niieoe Nd5Si3,
Nd5Si4, NdSi, NdSi1.5, NdSi1.87-1.75, ScSi, Sc5Si3, ScNdSi oa ScNd2Si2.
Aeyaeaii ?nioaaiiy ua o?ueio oa?ia?ieo niieoe (oaae.1). E?enoae?/ia
no?oeoo?a anoaiiaeaia aeey /ioe?ueio oa?ia?ieo niieoe. Niieoea Nd3Si4 ,
yea ooai?th?oueny a ?acoeueoao? oaa?aeioacieo ia?aoai?aiue i?e 1670 E,
i?e oaiia?aoo?? a?aeiaeo 1070 E ia cao?eniaaia.

A iio??ei?e nenoai? ia iniia? niieoee NdSi1.87-1.75 aeyaeaii oaa?aeee
?ic/ei i?ioyaei?noth aei 15 ao.% Sc, ia iniia? niieoee NdSi — oaa?aeee
?ic/ei i?ioyaei?noth aei 7 ao.% Sc, ia iniia? niieoee Sc5Si3 — oaa?aeee
?ic/ei i?ioyaei?noth aei 4 ao.% Nd. Oaa?ae? ?ic/eie ooai?ththoueny i?e
iino?eiiio ai?no? Si.

I?aeoaa?aeaeaii e?oa?aoo?i? aeai? i?i iaiaaeaio ?ic/eii?noue i?e 870 E
Neaiae?th oa Iaiaeeio.

?en.2. ?cioa?i?/iee ia?a??c ae?aa?aie noaio nenoaie Sc-Pr-Si i?e 870 E
(a iaeano? aei 65 ao.% Sc)

?en.3.?cioa?i?/iee ia?a??c ae?aa?aie noaio nenoaie Sc-Nd-Si i?e 870 E

Oaaeeoey 1

E?ENOAE?*I? NO?OEOO?E NIIEOE

I?aaenoaaieee co?oeoo?iiai oeio AlB2 (niieoee Sc0.95La0.05Si1.48,
Sc0.89Pr0.11Si1.53, Sc0.85-0.95Nd0.15-0.05Si1.67, Sc0.96Ce0.04Si1.51,
Sc0.89Sm0.11Si1.69). E?enoae?/ia no?oeoo?a an?o niieoe aeine?aeaeaia
iaoiaeii ii?ioeo.

I?ino. a?oia P6/mmm. Eii?aeeiaoe aoii?a o no?oeoo?ao niieoe aiaeia?/i?
eii?aeeiaoai aoii?a a no?oeoo?? a?ia?iiai i?ioioeio: R*-1(a):000,
R*-noaoenoe/ia noi?o aoii?a Sc oa ?CI; Si-2(d): 1/3 2/3 1/2.

Aeyaeaii iia? oa?ia?i? niieoee no?oeoo?iiai oeio AlB2 a nenoaiao Sc-Ce,
Sm-Si i?e 870 E oa ooi/iaii ?cioa?i?/i? ia?a??ce ae?aa?aie noaio oeeo
nenoai i?e 870 E a iaeano? 50 ao.% Si (?en.4).

?en.4. Ooi/iai? ?cioa?i?/i? ia?a??ce ae?aa?ai noaio nenoai Sc-Ce,Sm-Si
i?e 870E a iaeano? 50 ao.% Si (1- Sc0.96Ce0.04Si1.51, 2-
Sc0.89Sm0.11Si1.69, 3 — Sc0.3Sm0.7Si2)

I?aaenoaaieee no?oeoo?iiai oeio ScCeSi (niieoee ScLaSi, ScPrSi, ScNdSi,
ScGdSi). E?enoae?/ia no?oeoo?a aeine?aeaeaia iaoiaeii ii?ioeo. I?ino.
a?oia I4/mmm. Eii?aeeiaoe aoii?a: Sc — 4(c) 0 1/2 0; R — 4(e) 0 0
0,326; Si — 4(e) 0 0 0,124.

O nenoaiao Sc-Gd,Yb,Tm,Y,Eu-Si aoei aeaioiaeaii nieaae aea?aoiiiiai
neeaaeo ScRSi, ye? a?aeiaeaii i?e 870 E i?ioyaii 750 aiae.
O?eueee a nenoai? Sc-Gd-Si aeyaeaii niieoeo ScGdSi, ?cino?oeoo?io aei
niieoee ScCeSi. Ia??iaee ?ao?oee oe??? niieoee ianooii?: a=0,42416(6),
c=1,5488(5) ii.

A nenoaiao Sc-Yb,Tm,Y-Si i?e 870 E, eiia??ii, ?niothoue iaia?a?ai? ?yaee
oaa?aeeo ?ic/ei?a i?ae ?cino?oeoo?ieie a?ia?ieie nee?oeeaeaie neeaaeo
M5Si3 (M=Sc, R) (no?oeo. oei Mn5Si3), ine?eueee ii?ioeia?aie c?ace?a
neeaae?a Sc33.3R33.4Si33.3 i?noyoue e?i??, oa?aeoa?i? aeey no?oeoo?iiai
oeio Mn5Si3.

I?aaenoaaieee no?oeoo?iiai oeio Sm5Ge4 (Sc3Pr2Si4 (I), Sc1.26Pr3.74Si4
(II), Sc3.96Nd1.04Si4 (III), Sc3La2Si4 (IV)). I?ino. a?oia Pnma.
E?enoae?/ia no?oeoo?a niieoe Sc3Pr2Si4, Sc1.26Pr3.74Si4, Sc3.96Nd1.04Si4
aeine?aeaeaia iaoiaeii iiiie?enoaeo, niieoee Sc3La2Si4 — iaoiaeii
iiiie?enoaeo oa ii?ioeo. RF oa RwF -oaeoi?e aeey niieoe a?aeiia?aeii
??ai?: (I)-0,077; 0,048; (II)-0,068; 0,043; (III)-0,039; 0,039.

Ooi/iai? ia?aiao?e aoii?a niieoe no?oeoo?iiai oeio Sm5Ge4 nenoai
Sc-Pr,Nd-Si iaaaaeai? a oaae.2. A niieooe? Sc3Pr2Si4 aoiie aii?yaeeiaaii
caeiathoue iieiaeaiiy no?oeoo?e (iaaeno?oeoo?a Sc3Ce2Si4). I?e ooai?aii?
no?oeoo? oeio Sm5Ge4 oa Sc3Ce2Si4 ae??oaeueio ?ieue a?ae?a?a? ?ici??iee
oaeoi?.

I?aaenoaaieee no?oeoo?iiai oeio Mo2FeB2 (niieoee ScLa2Si2, ScPr2Si2,
ScNd2Si2). I?ino. a?oia P4/mbm. E?enoae?/ia no?oeoo?a niieoee ScNd2Si2
aeine?aeaeaia iaoiaeii iiiie?enoaeo. E?enoae?/ia no?oeoo?a niieoe
ScLa2Si2, ScPr2Si2 aeine?aeaeaia iaoiaeii ii?ioeo.

Eii?aeeiaoe aoii?a o no?oeoo?? ScNd2Si2 (RF=0,054; RwF=0,041): Sc: 000,
Nd:0; 0,1781(1); 0,6781(1); 0,5, Si: 0,3818(5); 0,8818(5); 0.
Eii?aeeiaoe aoii?a niieoee ScPr2Si2 (RP=0,0589; RwP=0,0821): Sc, 2(a),
000; B=0,17; Pr, 4(h), 0,1742; 0,6742; B=0,17; Si, 4(g), 0,3850; 0,8850;
0; B=0,17.

Oaaeeoey 2

Ia?aiao?e aoii?a niieoe no?oeoo?iiai oeio Sm5Ge4 nenoai Sc-Pr,Nd-Si

* R1=0,695Pr+0,305Sc; R2=0,35Pr+0,65Sc; R3=0,522Nd+0,478Sc.

AeINE?AeAEAIIss O?CE*IEO AEANOEAINOAE

Aeey niieoe Sc3Pr2Si4, ScNd2Si2, Sc3Sm2Si4 aei??thaaeanue oaiia?aoo?ia
caeaaei?noue iaai?oii? ni?eeiyoeeaino?. Caeaaei?noue (O) aecia/aeanue a
?ioa?aae? oaiia?aoo? 95-295 E. Aeey oeeo niieoe aaee/eia neaai
caeaaeeoue a?ae iai?oaeaiino? iaai?oiiai iiey.

Caeaaei?noue -1(O) aeey niieoee Sc3Pr2Si4 ia? e?i?eiee oa?aeoa?
(ia?aiaaiaoee Eth?? — Aaena), aeey niieoee ScNd2Si2 caeaaei?noue -1(O)
ia? neeaaeiee oa?aeoa?: a iaeano? oaiia?aoo? 170-295 E a?ao?e
caeaaeiino? -1(O) neeaaea?oueny c aeaio i?yiie?i?eieo ae?eyiie
(iieno?oueny caeiiii Eth?? — Aaena), a i?e ieae/eo oaiia?aoo?ao ?nio?
iiaeeea?noue iaai?oiiai aii?yaeeoaaiiy.

Aea/aiiy caeaaeiino? iaiaai?/aiino? a?ae iai?oaeaiino? iaai?oiiai iiey
oa oaiia?aoo?e aeey niieoee ScNd2Si2 aeaco? ia iiaeeea?noue
oa?iiaai?oiiai aii?yaeeoaaiiy a iaeano? oaiia?aoo? 77-199E.

Caeaaei?noue (O) aeey niieoee Sc3Sm2Si4 ? neeaaeiith. Oea, eiia??ii,
iiynith?oueny iniaeeainoyie aeaeo?iiii? aoaeiae aoii?a Sm: /anoeia
aoii?a Sm ciaoiaeyoueny a aaeaioiiio noai? (II) — ?iie Sm+2 iaiaai?oi?,
a /anoeia — a aaeaioiiio noai? (III) — ?iie Sm+3 oa?aeoa?ecothoueny
iaai?oiei iiiaioii. Niieoea ? ia?aiaaiaoeeii.

Aeey niieoee ScGdSi aei??thaaeenue caeaaei?noue iaiaai?/aiino? a?ae
iai?oaeaiino? iaai?oiiai iiey i?e 77 oa 293 E, oa caeaaei?noue
iaiaai?/aiino? a?ae oaiia?aoo?e i?e iino?ei?e iai?oaeaiino? iaai?oiiai
iiey (10 eA). Niieoea ? oa?iiaaiaoeeii. Iaai?oi? oa?aeoa?enoeee an?o
aeuaaeacaieo niieoe iaaaaeai? a oaae.3.

Oaaeeoey 3

Iaai?oi? oa?aeoa?enoeee aeayeeo oa?ia?ieo

niieoe nenoai Sc-Pr,Nd,Gd-Si

Aoei i?iaaaeaii aeine?aeaeaiiy ei?ic?eii? no?eeino? aeayeeo oa?ia?ieo
niieoe nenoai Sc- Ce, Pr, Nd, Sm-Si iioaioe?inoaoe/iei iaoiaeii o
5%-iiio aiaeiiio ?ic/ei? nieyii? eeneioe. ?acoeueoaoe aei??thaaiue oa
?ic?aooie?a i?aaenoaaeai? a oaae.4. Anoaiiaeaii, ui iaeieae/ei
iioaioe?aeii ei?ic?? a nieyi?e eeneio? oa?aeoa?eco?oueny niieoea
Sc3Pr2Si4, ui na?ae/eoue i?i ?? iaea?eueoo oa?iiaeeiai?/io no?ee?noue a
aeaiiio na?aaeiaeu?. Oaeaeeino? ei?ic?? iaeieae/? aeey niieoe ScCeSi,
ScNd2Si2, Sc3Pr2Si4.

Oaaeeoey 4

Aeaeo?iei?ic?ei? oa?aeoa?enoeee aeayeeo oa?ia?ieo niieoe

nenoai Sc-Ce, Pr, Nd, Sm-Si

O /aoaa?oiio ?icae?e? ocaaaeueiaii oa?aeoa? aca?iiae?? eiiiiiaio?a a
iio??eieo nenoaiao Sc-?CI-Si, i?iaaaeaii ii??aiyiiy oeeo nenoai i?ae
niaith oa ?icaeyiooi e?enoaeio?i?/i? iniaeeaino? oa?ia?ieo nee?oeeae?a
Neaiae?th.

A a?oi? nenoai Sc-R-Si (R-?CI oea???ai? i?aea?oie) aca?iia ?ic/eii?noue
eiiiiiaio?a Sc oa R a a?ia?ieo nee?oeeaeao ? iaaaeeeith ? ia ia?aaeuo?
15 ao. % Sc, ooai?th?oueny aaeeea e?euee?noue oa?ia?ieo niieoe. ?c
ca?eueoaiiyi ii?yaeeiaiai iiia?a ?CI, e?euee?noue oa?ia?ieo niieoe a
nenoai? caeiiii??ii ciaioo?oueny. E?enoae?/i? no?oeoo?e a?aeiieo ia
nueiaiaei? 26 oa?ia?ieo niieoe, c 38 neioaciaaieo, iaeaaeaoue aei
no?oeoo?ieo oei?a a?ia?ieo niieoe aai aei ?o iaaeno?oeoo? (iaaeno?oeoo?a
Sc3Ce2Si4 a?ia?iee i?ioioei Sm5Ge4, Mo2FeB2 U3Si2, ScCeSi
La2Sb)(oaae.5).

Oaaeeoey 5

?yaee ?cino?oeoo?ieo oa?ia?ieo niieoe a nenoaiao Sc-R-Si

(R = La, Ce, Pr, Nd, Sm, Y, Gd, Dy, Er, Lu)

Ia?aaaaeia a?eueo?noue oa?ia?ieo niieoe iathoue noaeee neeaae ?
iiai?noth (o aeiaaeeo niieoe Sc3R2Si4, R = La, Ce, Pr, Sm; ScRSi, R=La,
Ce, Pr, Nd, Sm), aai /anoeiai (Sc1.26Pr3.74Si4, Sc3.96Nd1.04Si4)
aii?yaeeiaai? e?enoae?/i? no?oeoo?e. Oa?aeoa?iith iniaeea?noth no?oeoo?
ciieoe ? nei?i/ai? (ia 2-7%) ii??aiyii ?c noiith aoiiieo ?aae?on?a
i?aeaoiii? a?aeaeae? Sc — Sc, Sc — Si, Sc — R, R — Si, Si — Si. Oea
aeaco? ia aca?iiae?th i?ae aeaieie aoiiaie oa oaiaeaioe?th aei ooai?aiiy
iai?yieaieo ca`yce?a eiaaeaioiiai oeio a no?oeoo?ao niieoe.

Iio??ei? nenoaie Sc-R-Si, aea R-?CI ?o???ai? i?aea?oie,
oa?aeoa?ecothoueny ooai?aiiyi i?ioyaeieo oaa?aeeo ?ic/ei?a ia iniia?
a?ia?ieo nee?oeeae?a, aae aei ooai?aiiy iaia?a?aieo ?yae?a oaa?aeeo
?ic/ei?a i?ae ?cino?oeoo?ieie a?ia?ieie nee?oeeaeaie ?CI (?en. 5). A
oeeo nenoaiao ooai?th?oueny iaaaeeea e?euee?noue oa?ia?ieo niieoe (1 aai
2), aai oa?ia?i? niieoee acaaae? a?aenooi?.

Anoaiiaeaii, ui a?eueo?noue ?CI oea???ai? i?aea?oie, a oaeiae Dy i Y,
noaa?e?cothoue i?e 870 E (aeey Y i?e 1070 E) oa?ia?i? oace ?c
no?oeoo?ith AlB2 a iio??eieo nenoaiao Sc-?CI-Si.

Anoaiiaeaii ei?aeyoe?th i?ae ii?yaeeiaei iiia?ii ?CI ? neeaaeii
oa?ia?ii? niieoee Sc1-xRxSi2-y ?c no?oeoo?ith AlB2 a nenoaiao Sc-R-Si.
An? oa?ia?i? niieoee aeaiiai no?oeoo?iiai oeio oa?aeoa?ecothoueny
aeaoaeoi?noth iieiaeaiue, caeiyoeo aoiiaie Si.

?en. 5. Iaeneiaeueia ?ic/eii?noue Neaiae?th a a?ia?ieo nee?oeeaeao ?CI
i?e 870 E (aeey Y ? Lu — i?e 1070 E).

Ia ?en. 6 oa 7 iaaaaeai? caeaaeiino? ia’?io aeaiaioa?ii? eii??ee
oa?ia?ieo niieoe no?oeoo?iiai oeio AlB2 nenoai Sc-La, Ce, Pr, Nd, Sm-Si
oa a?aeaeaeae Si-Si a?ae ai?noo Nee?oe?th a niieooe?. Ia ?en. 8 iieacaii
iieiaeaiiy niieoe ia o?eeooieeo A?aana a caeaaeiino? a?ae ?CI.

Niieoea c Oea???i aeiaaea? c ?yaeo oeeo caeiiii??iinoae. Oea, iiaeeeai,
na?ae/eoue i?i a?aei?ii?noue aaeaioiiai noaio Oea??th a aeai?e niieooe?
(IV aai i?ii?aeiee aaeaioiee noai) ii??aiyii c ?ioeie ?CI.

I?aeaoiii? a?aeaeae? Si-Si a no?oeoo?ao oeeo oa?ia?ieo niieoe ? cia/ii
nei?i/aieie ii??aiyii ?c noiith ?aae?on?a ?o aoii?a. Aea oae? ?o
cia/aiiy iiyniththoueny oei, ui iieiaeaiiy 2(d) a no?oeoo?? caeiyo?
aoiiaie Si ia iiai?noth. Oiaoi aaciina?aaeiuei oae? a?aenoai? a
no?oeoo?? ia ?aae?ciaothoueny.

I?iaaaeaii e?enoaeio?i?/iee aiae?c oa?ia?ieo niieoe no?oeoo?iiai oeio
Sm5Ge4 nenoai R-R’-Si, Ge oa nii??aeiaieo aei ieo nenoai. Na?aae
aeyaeaieo iiaeo oa?ia?ieo nee?oeeae?a oeueiai no?oeoo?iiai oeio
aeae?eaii niieoee c iiaiei (Sc3La2Si4, Sc3Pr2Si4) oa /anoeiaei
(Sc1.26Pr3.74Si4, Sc3.96Nd1.04Si4) aii?yaeeoaaiiyi aoii?a o
e?enoaeia?ao?/ieo iieiaeaiiyo no?oeoo?e. I?e ooai?aii? no?oeoo? oeio
Sm5Ge4 ae??oaeueio ?ieue a?ae?a?a? ?ici??iee oaeoi?.

?en.6. Caeaaei?noue ia’?io aeaiaioa?ii? eii??ee (V) niieoe (Sc,R)Six
no?oe-oo?iiai oeio AlB2 nenoai Sc-La,Ce,Pr,Nd,Sm-Si a?ae ai?noo
Nee?oe?th (x)

?en.7. Caeaaei?noue i?aeaoiiieo a?aeaeaeae Si-Si (dSi-Si) a
co?oeoo?ao niieoe (Sc,R)Six no?oeoo?iiai oeio AlB2 nenoai Sc-La, Ce,
Pr, Nd, Sm-Si a?ae ai?noo Nee?oe?th (x) (aeey niieoee c Iaiaeeiii
i?aeaoiii? a?aeaeae? ?ic?aoiaai? aeey neeaaeo Sc0.85Nd0.15Si1.67)

?en.8. Iieiaeaiiy ia o?eeooieeo A?aana oa?ia?ieo oac ?c no?oeoo?ith AlB2
a nenoaiao Sc-La, Ce, Pr, Nd, Sm-Si

Aeey niieoe ScRSi no?oeoo?iiai oeio ScCeSi nenoai Sc-La, Ce, Pr, Nd,
Sm, Gd-Si oa?aeoa?ia caeiiii??ia ciaioaiiy ia’?io aeaiaioa?ii? eii??ee
?c ca?eueoaiiyi ii?yaeeiaiai iiia?a ?CI (?en.9).

?en.9. A?ao?e ci?ie ia’?io aeaiaioa?ii? eii??ee ?c c?inoaiiyi
ii?yaeeiaiai iiia?a ?CI niieoe ScRSi no?oeoo?iiai oeio ScCeSi

Ia’?i eii??ee aeey niieoee ScCeSi ? iaioei, ui, eiia??ii, iia’ycaii c
?ioei aaeaioiei noaiii aoii?a Ce (IV aai ia?ao?aeiei), i?ae o ?aooe ?CI
(III).

Ia caaaeath/e ia iiae?ai?noue aeaeo?iiii? aoaeiae aoiia Eu aei
aeaeo?iiii? aoaeiae non?aei?o aoii?a Sm i Gd, ia aaeaeinue iaea?aeaoe
i?e oeo naieo oiiaao niieoeo ScEuSi, ?cino?oeoo?io aei ScCeSi. Eiia??ii,
oea iiaeia iiynieoe ?ioei aaeaioiei noaiii aoii?a Eu.

I?e ooai?aii? oa?ia?ieo niieoe no?oeoo?iiai oeio Mo2FeB2 ae??oaeueio
?ieue a?ae?a?athoue ?ici??iee oaeoi? oa oaeoi? aeaeo?iiii?
eiioeaio?aoe??.

AENIIAEE

1.Iaoiaeaie ?aioaaiioaciaiai, ?aioaaiino?oeoo?iiai oa /anoeiai
i?e?ino?oeoo?iiai aiae?c?a aea/aii aca?iiae?th eiiiiiaio?a a iio??eieo
nenoaiao Sc-La, Pr, Nd-Si. Iiaoaeiaaii ?cioa?i?/i? ia?a??ce ae?aa?ai
noaio oeeo nenoai i?e 870 E.

2.Ooi/iaii ?cioa?i?/i? ia?a??ce ae?aa?ai noaio nenoai Sc-Ce, Sm-Si i?e
870 E a iaeano? 50 ao.% Si.

3.I?aeoaa?aeaeaii ?nioaaiiy oanoe, a oaeiae aia?oa aeyaeaii ?nioaaiiy 17
oa?ia?ieo niieoe a nenoaiao Sc-La,Ce,Pr,Nd,Sm,Gd-Si. Iaoiaeaie
iiiie?enoaeo oa ii?ioeo anoaiiaeaii e?enoae?/i? no?oeoo?e 16 oa?ia?ieo
niieoe. ?o no?oeoo?e iaeaaeaoue aei 4 no?oeoo?ieo oei?a.

4.E?enoae?/i? no?oeoo?e an?o oa?ia?ieo niieoe iaeaaeaoue aei no?oeoo?ieo
oei?a a?ia?ieo niieoe, aai oei?a, iaaeno?oeoo?ieo aei ieo. No?oeoo?e
niieoe iaeneiaeueii aii?yaeeiaai? aai iaaeeaeathoueny aei iaeneiaeueiiai
aii?yaeeoaaiiy.

5.Anoaiiaeaii caeiiii??iino? oa?aeoa?o aca?iiae?? eiiiiiaio?a oa
iniaeeainoae ooai?aiiy niieoe a iio??eieo nenoaiao Sc-?CI-Si. A ?yaeo
?CI ?c ca?eueoaiiyi ii?yaeeiaiai iiia?a (ciaioaiiy ?aae?ona aoiia)
e?euee?noue oa?ia?ieo niieoe ciaioo?oueny, a caeaoi?noue aoii?a Sc i ?CI
aei aca?iicai?uaiiy c?inoa?.

6.Nei?i/aiiy a?aenoaiae i?ae ia?aaaaeiith a?eueo?noth aoii?a (ii??aiyii
?c noiith ?o aoiiieo ?aae?on?a) aeaco? ia oaiaeaioe?th aei ooai?aiiy
iai?yieaieo ca’yce?a eiaaeaioiiai oeio a no?oeoo?ao.

7.Iieacaii aca?iica’ycie i?ae aeine?aeaeaieie iaie no?oeoo?aie oa ?ioeie
no?oeoo?ieie oeiaie. Neeaaei? no?oeoo?i? oeie ooai?ththoueny oeyoii
eiia?iaoe?? o?aaiaio?a i?ino?oeo no?oeoo?.

8.Ia iniia? ii??aiyiiy ia’?i?a aeaiaioa?ii? eii??ee niieoe no?oeoo?iiai
oeio ScCeSi c?iaeaii aeniiaie i?i i?ii?aeiee aaeaioiee noai aoii?a
Oea??th o niieooe? ScCeSi. Neeaaeiee oa?aeoa? oaiia?aoo?ii? caeaaeiino?
iaa?iaii? iaai?oii? ni?eeiyoeeaino? niieoee Sc3Sm2Si4 oaeiae aeaco? ia
i?ii?aeiee aaeaioiee noai aoii?a Sm..

9.Anoaiiaeaii ei?aeyoe?th i?ae ii?yaeeiaei iiia?ii ?CI ? neeaaeii
oa?ia?ii? niieoee Sc1-xRxSi2-y c? no?oeoo?ith AlB2 a nenoaiao Sc-R-Si.

10.Aeey ie?aieo c?ace?a aea/aii aeaye? o?ce/i? ? o?i?/i? aeanoeaino?
(iaai?oio ni?eeiyoeea?noue oa ei?ic?eio no?ee?noue).

?IAIOE, IIOAE?EIAAI? II OAI? AeENA?OAOe??

Kotur B.Ya., Banakh O.E., ern R., Pacheco Espejel J.V. Crystal
structures of the new ternary rare earth silicides Sc3Pr2Si4,
Sc1.26Pr3.74Si4 and Sc3.96Nd1.04Si4 with ordered and partially ordered
rare earth sites // Journal of Alloys and Compounds — 1997.- V.260.-
P.157-161.

Banakh O.E., Kotur B.Ya. The Sc-Nd-Si ternary system at 870 K // Journal
of Alloys and Compounds — 1998.- V.268.- L2-L5.

Aaiao I.?., Eioo? A.ss. Aca?iiae?y eiiiiiaio?a a iio??eieo nenoaiao
Sc-R-Si (R=La,Ce,Pr,Nd,Sm,Y,Dy,Er,Lu) // Oe?a?inueeee o?i?/iee aeo?iae.
— 1998. — O.64, ? 6. — N.94-95.

Aaiao I.?. Iia? oa?ia?i? niieoee no?oeoo?iiai oeio AlB2 a iio??eieo
nenoaiao Sc-La,Pr,Nd-Si // Oe?a?inueeee o?i?/iee aeo?iae.- 1998. — O.64,
? 7.-N.32-34.

Eioo? A.ss., Aaiao I.?. Iio??ei? nenoaie Sc-La(Pr)-Si // A?niee
Euea?anueeiai oi?aa?neoaoo. Na??y o?i?/ia.- 1999.- Aei. 38.- N.74-78.

Eioo? A.ss., Naiaieoei* I.A., Neee?eoea I. E?enoaeee/aneay no?oeoo?a
o?ieiuo niaaeeiaiee nenoaiu Sc-Nd-Si // Oacenu aeieeaaeia VI Ciaauaiey
ii e?enoaeeioeiee iai?aaie/aneeo e eii?aeeiaoeeiiiuo niaaeeiaiee. —
Eueaia. — 1992. — N.191.

Aaiao I.?., Eioo? A.ss. E?enoae?/ia no?oeoo?a aeayeeo oa?ia?ieo niieoe
nenoai Sc-LaPr-Si // Oace aeiiia?aeae XIV Oe?a?inueei? eiioa?aioe?? c
iai?aai?/ii? o?i??. — Ee?a. — 1996. — N.187.

Aaiao I.?., Eioo? A.ss. Iio??eia nenoaia Sc-Pr-Si i?e 870 E // Oace
aeiiia?aeae VI iaoeiai? eiioa?aioe?? “Euea?anuee? o?i?/i? /eoaiiy-97”.-
Euea?a.- 1997.- N.23.

Banakh O., Kotur B. Phase equilibria in Sc-R-Si ternary systems
(R=La,Ce,Pr,Nd,Sm,Y,Dy,Er,Lu) // Proceeding of the Second International
Scientific Conference “Engineering and functional materials”.-Lviv. —
1997.- P.34-35.

__________

* Ae?ai/a i??caeua aaoi?a.

AIIOAOe?ss

Aaiao I.?. Iio??ei? nenoaie Sc-?CI oea???ai? i?aea?oie — Si (oacia?
??aiiaaae, e?enoae?/i? no?oeoo?e oa o?ce/i? aeanoeaino?
niieoe).-?oeiien.

Aeena?oaoe?y ia caeiaoooy iaoeiaiai nooiaiy eaiaeeaeaoa o?i?/ieo iaoe ca
niaoe?aeuei?noth 02.00.01 — iai?aai?/ia o?i?y.- Euea?anueeee aea?aeaaiee
oi?aa?neoao ?iai? ?aaia O?aiea, Euea?a, 1999.

Aeena?oaoe?y i?enay/aia aeine?aeaeaiith oa?aeoa?o aca?iiae?? eiiiiiaio?a
a iio??eieo nenoaiao Sc — ?CI oea???ai? i?aea?oie — Si. Iiaoaeiaaii
?cioa?i?/i? ia?a??ce ae?aa?ai noaio nenoai Sc-La,Pr,Nd-Si i?e 870E oa
ooi/iaii ?cioa?i?/i? ia?a??ce ae?aa?ai noaio nenoai Sc-Ce,Sm-Si i?e 870
E a iaeano? 50 ao.%Si. Ciaeaeaii 23 oa?ia?i? niieoee, 17 c yeeo aia?oa.
Aeey 16 niieoe anoaiiaeaii e?enoae?/io no?oeoo?o. No?oeoo?e niieoe
iaeaaeaoue aei 4 no?oeoo?ieo oei?a. Aeine?aeaeai? iaai?oi? oa
aeaeo?iei?ic?ei? aeanoeaino? aeayeeo oa?ia?ieo niieoe nenoai
Sc-Ce,Pr,Nd,Sm,Gd-Si.

Eeth/ia? neiaa: iio??eia nenoaia, ae?aa?aia noaio, ?ioa?iaoae?/ia
niieoea, e?enoae?/ia no?oeoo?a, no?oeoo?iee oei.

AIIIOAOeEss

Aaiao I.A. O?ieiua nenoaiu Sc — ?CI oea?eaaie iiaea?oiiu — Si (oaciaua
?aaiiaaney, e?enoaeee/aneea no?oeoo?u e oece/aneea naienoaa
niaaeeiaiee).- ?oeiienue.

Aeenna?oaoeey ia nieneaiea o/aiie noaiaie eaiaeeaeaoa oeie/aneeo iaoe ii
niaoeeaeueiinoe — 02.00.01 — iai?aaie/aneay oeiey.- Eueaianeee
ainoaea?noaaiiue oieaa?neoao eiaie Eaaia O?aiei, Eueaia, 1999.

Aeenna?oaoeey iinayuaia enneaaeiaaieth oa?aeoa?a acaeiiaeaenoaey
eiiiiiaioia a o?ieiuo nenoaiao Sc — ?CI oea?eaaie iiaea?oiiu — Si.

I?iaaaeaii nenoaiaoe/aneia eco/aiea nenoai Sc — La, Pr, Nd — Si
iaoiaeaie ?aioaaiianeiai oaciaiai e no?oeoo?iiai aiaeecia,
iee?ino?oeoo?iiai aiaeeca. Iino?iaiu ecioa?ie/aneea na/aiey aeeaa?aii
ninoiyiey nenoai Sc — La, Pr, Nd — Si i?e 870E e ooi/iaiu ecioa?ie/aneea
na/aiey aeeaa?aii ninoiyiey nenoai Sc — Ce, Sm- Si i?e 870 E a iaeanoe
50 ao.%Si. A nenoaiao Sc — La, Ce, Pr, Nd, Sm, Gd — Si i?e 870 E
iaeaeaii 23 oa?ia?iuo niaaeeiaiey, 17 ec ieo aia?aua. Aeey 16
niaaeeiaiee onoaiiaeaia e?enoaeee/aneay no?oeoo?a. No?oeoo?u niaaeeiaiee
auee onoaiiaeaiu iaoiaeaie ?aioaaiino?oeoo?iiai ii?ioeiaiai e
iiiie?enoaeueiiai aiaeecia. E?enoaeee/aneea no?oeoo?u eioa?iaoaeee/aneeo
niaaeeiaiee enneaaeoaiuo nenoai i?aiaaeeaaeao e no?oeoo?iui oeiai
aeia?iuo niaaeeiaiee (AlB2, Sm5Ge4) eee e oeiai, naa?ono?oeoo?iui e iei
(naa?ono?oeoo?a ScCeSi — aeia?iue i?ioioei La2Sb, Mo2FeB2 U3Si2,
Sc3Ce2Si4 Sm5Ge4). Aoiiu ?acee/iuo eiiiiiaioia a no?oeoo?ao
oii?yaei/aiii caieiatho i?aaeeueiua nenoaiu oi/ae eee i?eaeeaeathony e
iaeneiaeueiiio oii?yaei/aieth.

A nenoaiao Sc-La, Ce, Pr, Nd, Sm, -Si i?e 870 E a nieaaao ninoaaa 60
ao.% Si e iaaieueoei niaea?aeaieai ?CI (2-5 ao. %) auee iaeaeaiu
oa?ia?iua niaaeeiaiey ni no?oeoo?ie AlB2. Aa?iyoii, iaaieueoea aeiaaaee
?CI noaaeeece?otho ia?aciaaiea oa?ia?iuo niaaeeiaiee yoiai no?oeoo?iiai
oeia a aeaiiuo nenoaiao. Aiciiaeii, iie yaeythony /anoyie oaa?aeuo
?anoai?ia ia iniiaa niaaeeiaiey ScSi1.5, nouanoaothuaai i?e aunieeo
oaiia?aoo?ao (1198 E). Eii?aeeiaou aoiiia a no?oeoo?ao oa?ia?iuo
niaaeeiaiee, eioi?ua e?enoaeeecothony a no?oeoo?iii oeia AlB2,
aiaeiae/iu eii?aeeiaoai aoiiia a no?oeoo?a aeia?iiai i?ioioeia.
Iieiaeaiea, oa?aeoa?iia aeey aoiiia iaoaeea a no?oeoo?a, caiyoi
noaoenoe/aneie nianueth aoiiia ?CI, a iiae?aoaoea aoiiia Si — aeaoaeoia.

Onoaiiaeaia ei??aeyoeey iaaeaeo ii?yaeeiaui iiia?ii ?CI e ninoaaii
oa?ia?iiai niaaeeiaiey Sc1-xRxSi2-y ni no?oeoo?ie AlB2 a nenoaiao
Sc-R-Si.

Onoaiiaeaii, /oi i?e ia?aciaaiee oa?ia?iuo niaaeeiaiee ni no?oeoo?ie
oeia Mo2FeB2 cia/eoaeueioth ?ieue ea?atho ?acia?iue oaeoi? e oaeoi?
yeaeo?iiiie eiioeaio?aoeee.

I?iaaaeai e?enoaeeioeie/aneee aiaeec oa?ia?iuo niaaeeiaiee no?oeoo?iiai
oeia Sm5Ge4 a nenoaiao R-R’(T)-X, (R,R’=?CI, T=d — yeaiaio, X=Si, Ge).
Onoaiiaeaii, /oi i?e ia?aciaaiee no?oeoo? yoiai oeia ?aoathuoth ?ieue
ea?aao ?acia?iue oaeoi?. A ioee/ea io nenoai R-R’-Ge, aaea oa?ia?iua
niaaeeiaiey ni no?oeoo?ie Sm5Ge4 yaeythony /anoyie noaaeeeciaaiiuo e
iecoei oaiia?aoo?ai oaa?aeuo ?anoai?ia ia iniiaa aeia?iuo aa?iaieaeia
ninoaaa R5Ge4 (R’5Ge4), oa?ia?iua niaaeeiaiey nenoai R-R’-Si yaeythony
eiaeeaeaeoaeueiuie oa?ia?iuie niaaeeiaieyie.

N oaaee/aieai ii?yaeeiaiai iiia?a aoiia ?CI iau?i yeaiaioa?iie y/aeee
niaaeeiaiee ScRSi no?oeoo?iiai oeia ScCeSi a nenoaiao Sc-La, Ce, Pr, Nd,
Sm, Gd-Si oiaiueoaaony. Yoi naycaii n oiaiueoaieai aoiiiiai ?aaeeona ?CI
n oaaee/aieai aai ii?yaeeiaiai iiia?a (eaioaiieaeiia naeaoea). A ?yaeo
ecino?oeoo?iuo niaaeeiaiee ScRSi niaaeeiaiea n Ne oa?aeoa?ecoaony
oiaiueoaiiui cia/aieai iauaia yeaiaioa?iie y/aeee. Yoi oeacuaaao ia
?acee/ea aaeaioiiai ninoiyiey aoiiia Oea?ey (IV eee ia?aoiaeiia) e
ae?oaeo ?CI a yoii ?yaeo niaaeeiaiee. Ianiio?y ia aeecinoue yeaeo?iiiie
no?oeoo?u aoiiia Eu e ninaaeieo aoiiia Sm e Gd, ia oaeaeinue iieo/eoue
i?e yoeo aea oneiaeyo oa?ia?iia niaaeeiaiea ScEuSi ecino?oeoo?iia e
ScCeSi. Aiciiaeii, yoi iauyniyaony ae?oaei aaeaioiui ninoiyieai aoiiia
Eu.

A nenoaiao Sc — ?CI — Si n oaaee/aieai ii?yaeeiaiai iiia?a aoiia ?CI
eiee/anoai oa?ia?iuo niaaeeiaiee oiaiueoaaony, a niiniaiinoue e
acaeiicaiauaieth aoiiia ?CI caeiiiia?ii oaaee/eaaaony. Nie?auaiea
?annoiyiee iaaeaeo aieueoeinoaii aoiiia (ii n?aaiaieth n noiiie eo
aoiiiuo ?aaeeonia) oeacuaaao ia oaiaeaioeeth e ia?aciaaieth a no?oeoo?ao
iai?aaeaiiuo naycae eiaaeaioiiai oeia.

Eco/aia acaeiinaycue iaaeaeo enneaaeiaaiuie no?oeoo?aie e ae?oaeie
no?oeoo?iuiu oeiaie. Neiaeiua no?oeoo?iua oeiu ia?acothony iooai
eiiaeiaoeee o?aaiaioia aieaa i?inouo no?oeoo?.

Enneaaeiaaiu iaaieoiua naienoaa iaeioi?uo oa?ia?iuo niaaeeiaiee nenoai
Sc-Pr,Nd,Sm,Gd-Si. Niaaeeiaiea ScNd2Si2 a iaeanoe oaiia?aoo? 77-199E
yaeyaony iaaieoiioii?yaei/aiiui, a i?e oaiia?aoo?ao auoa 199E —
ia?aiaaiaoeeii Eth?e-Aaenna. Oaiia?aoo?iay caaeneiinoue aeey
niaaeeiaiey Sc3Sm2Si4 eiaao neiaeiue oa?aeoa?, /oi, aa?iyoii,
iauyniyaony iniaaiiinoyie yeaeo?iiiie no?oeoo?u aoiiia Sm: /anoue aoiiia
Sm iaoiaeyony a aaeaioiii ninoiyiee (II) — eiiu Sm2+ iaiaaieoiu, a
/anoue aoiiia — a aaeaioiii ninoiyiee (III) — eiiu Sm3+ oa?aeoa?ecothony
iaaieoiui iiiaioii. Niaaeeiaiea Sc3Pr2Si4 a eioa?aaea enneaaeoaiuo
oaiia?aoo? 95-295 E yaeyaony ia?aiaaiaoeeii Eth?e-Aaenna. Niaaeeiaiea
ScGdSi — oa??iiaaiaoee.

Enneaaeiaaiu yeaeo?iei??iceiiiua naienoaa iaeioi?uo oa?ia?iuo
niaaeeiaiee nenoai Sc-Ce, Pr, Nd, Sm-Si. Onoaiiaeaii, /oi iaeaieueoei
iioaioeeaeii ei??icee a 5%-iii aiaeiii ?anoai?a nieyiie eeneiou
oa?aeoa?ecoaony niaaeeiaiea Sc3Pr2Si4, /oi oeacuaaao ia aai iaeaunooth
oa?iiaeeiaie/aneoth noaaeeueiinoue a aeaiie n?aaea. I?iaaaeai
n?aaieoaeueiue aiaeec eaoaeeoe/aneie aeoeaiinoe e niiniaiinoe e
aeae?e?iaaieth iaeioi?uo oa?ia?iuo niaaeeiaiee nenoai Sc-Ce, Pr, Nd,
Sm-Si. Niaaeeiaiey ScNd2Si2, Sc3Ce2Si4, Sc3Pr2Si4, aa?iyoii, neeiiiu e
aeae?e?iaaieth, iineieueeo aeey ieo aaee/eiu ia?aiai?yaeaiey auaeaeaiey
aiaei?iaea (io?eoeaoaeueiay aaee/eia) yaeythony iaaieueoeie.

Eeth/aaua neiaa: o?ieiay nenoaia, aeeaa?aiia ninoiyiey,
eioa?iaoaeee/aneia niaaeeiaiea, e?enoaeee/aneay no?oeoo?a, no?oeoo?iue
oei.

SUMMARY

Banakh O.E. Ternary systems Sc — R.E.E. of cerium subgroup — Si (phase
equilibria, crystal structures and physical properties of
compounds).-Manuscript.

Thesis for a candidate degree by speciality 02.00.01 — inorganic
chemistry. -The Ivan Franko State University of Lviv, Lviv, 1999.

The thesis is devoted to investigation of the character of component’s
interaction in the Sc-R.E.E.-Si ternary systems. The phase equilibria of
the Sc — La, Pr, Nd — Si ternary systems are determined at 870 K. The
phase equilibria of the Sc-Ce,Sm-Si ternary systems at 870 K are defined
more precisely in the 50 at.% Si range. Totally 23 ternary compounds
have been found. 17 compounds among them were synthesized for the first
time. Crystal structure has been determined for 16 compounds. They
belong to 4 structure types. Magnetic and electrochemical corrosion
properties of some ternary compounds of the Sc-Ce,Pr,Nd,Sm,Gd-Si systems
have been investigated.

Key words: ternary system, phase diagram, intermetallic compound,
crystal structure, structure type.

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