A new modification of lanthanum monosilicide - IT-LaSi

Authors
Mattausch, H Oeckler, O Simon, A
Citation
H. Mattausch et al., A new modification of lanthanum monosilicide - IT-LaSi, Z ANORG A C, 625(7), 1999, pp. 1151-1154
Citations number
16
Categorie Soggetti
Inorganic & Nuclear Chemistry
Journal title
ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE
ISSN journal
00442313 → ACNP
Volume
625
Issue
7
Year of publication
1999
Pages
1151 - 1154
Database
ISI
SICI code
0044-2313(199907)625:7<1151:ANMOLM>2.0.ZU;2-G
Abstract
La metal and silicon react at 950 degrees C in the presence of LaBr3 to for m LaSi with the hitherto unknown low temperature modification (1T-LaSi). 1T -LaSi crystallizes in Cmcm with a = 456.21(2), b = 1348.03(5), c = 662.59(6 ) pm. The Si atoms are connected to form cis-trans-cis-trans chains with al ternating distances of d(Si-Si) = 248 and 260 pm. They are coordinated in a trigonal prismatic fashion by the La atoms. 1T-LaSi shows metallic conduct ivity.