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Titolo:
Ca3Ni8In4 - An ordered noncentrosymmetric variant of the BaLi4 type
Autore:
Zaremba, VI; Muts, IR; Kalychak, YM; Hoffmann, RD; Pottgen, R;
Indirizzi:
Univ Munich, Dept Chem, D-81377 Munich, Germany Univ Munich Munich Germany D-81377 h, Dept Chem, D-81377 Munich, Germany Ivan Franko Natl Univ Lviv, Dept Inorgan Chem, UA-79005 Lvov, Ukraine IvanFranko Natl Univ Lviv Lvov Ukraine UA-79005 UA-79005 Lvov, Ukraine
Titolo Testata:
JOURNAL OF SOLID STATE CHEMISTRY
fascicolo: 2, volume: 160, anno: 2001,
pagine: 415 - 420
SICI:
0022-4596(200109)160:2<415:C-AONV>2.0.ZU;2-G
Fonte:
ISI
Lingua:
ENG
Soggetto:
INTERMETALLIC COMPOUNDS; ABSOLUTE-CONFIGURATION; CRYSTAL-STRUCTURES; RARE-EARTH; PD;
Keywords:
intermetallic indium compounds; crystal structure; polyanion;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
46
Recensione:
Indirizzi per estratti:
Indirizzo: Pottgen, R Univ Munich, Dept Chem, Butenandtstr 5-13,Haus D, D-81377 Munich, Germany Univ Munich Butenandtstr 5-13,Haus D Munich Germany D-81377 ny
Citazione:
V.I. Zaremba et al., "Ca3Ni8In4 - An ordered noncentrosymmetric variant of the BaLi4 type", J SOL ST CH, 160(2), 2001, pp. 415-420

Abstract

The title compound was synthesized by reacting the elements in an are-melting apparatus under purified argon and subsequent annealing at 870 K. Ca3Ni8In4 was investigated using X-ray diffraction on both powders and single crystals: P6(3)mc, a = 898.9 (1) pm, c = 752.2 (2) pm, wR2 = 0.0591, 327 F-2 values, and 35 parameters. This structure is an ordered, non centrosymmetric variant of the BaLi4 type. The nickel and indium atoms build a complex three-dimensional [Ni,Inj polyanion in which the calcium atoms fill distortedhexagonal channels. To a first approximation the formula may be written as(3 Ca2+)(6+) [Ni8In4](6-). Within the polyanion the Ni1, Ni3, and Ni4 atoms form one-dimensional cluster units which extend in the c direction while the Ni2 atoms have only indium neighbors in a distorted tetrahedral coordination. The Ni-Ni distances in the cluster range from 241 to 266 pm. The cluster units are surrounded and interconnected by indium atoms. The group-subgroup relation from centrosymmetric BaLi4 to noncentrosymmetric Ca,Ni,ln, is presented. Chemical bonding in Ca3Ni8In4 and the structural relation withLu3Co7.77Sn4, Ca3Au6.61Ga4.39, and Co2Al5 is briefly discussed. (C) 2001 Academic Press.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 10/07/20 alle ore 12:52:20