ISSN:
0044-2313
Keywords:
Calcium palladium pnictides
;
Preparation
;
crystal structure
;
Chemistry
;
Inorganic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Description / Table of Contents:
Preparation and Crystal Structures of the Compounds CaPdAs, CaPdSb, and CaPdBiThe new compounds CaPdAs, CaPdSb, and CaPdBi were prepared by heating appropriate mixtures of the elements. X-ray structure determinations carried out with single crystals (space group and lattice constants see “Inhaltsübersicht”) showed, that the arsenide crystallizes in a distorted stacking variant of the AlB2, type structure, where the Pd atoms have a planar environment of As atoms. CaPdSb and CaPdBi are isotypic and form the TiNiSi type structure, where the Pd-Atoms are surrounded tetrahedrally (strongly distorted) by Sb or Bi atoms.
Notes:
CaPdAs (Pnma; a = 7,137(1) Å, b = 8,646(2) Å, c = 16,590(3) Å; Z = 16) kristallisiert in einer verzerrten Stapelvariante des AlB2-Typs, bei der die Pd-Atome planar von drei As-Atomen umgeben sind. CaPdSb (a = 7,354(2) Å, b = 4,617(1) Å, c = 7,903(2) Å) und CaPdBi (a = 7,422(2) Å, b = 4,753(1) Å, c = 8,085(2) Å) sind isotyp und bilden die TiNiSi-Struktur (Pnma; Z = 4) mit einer stark verzerrten Tetraederkoordination um die Pd-Atome. Die Verbindungen wurden durch Erhitzen der entsprechenden Elementgemenge dargestellt, die Strukturen röntgenographisch mit Einkristallmethoden bestimmt.
Additional Material:
3 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/zaac.19926180106
