ISSN:
0044-2313
Keywords:
Tin rhodium borides
;
preparation
;
crystal structure
;
Chemistry
;
Inorganic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Description / Table of Contents:
The Tin Rhodium Borides SnRh3B1-x, Sn4Rh6B, and Sn5Rh6B2The new compounds SnRh3B1-x (x ∼ 0.2, tetragonal, P4/mbm, a = 570.31(2) pm, c = 835.99(8) pm, Z = 4, 514 reflexions, 26 parameters, R = 0.026), Sn4Rh6B (hexagonal, P63/mmc, a = 560.01(3) pm, c = 1367.5(1) pm, Z = 2, 746 reflexions, 17 parameters, R = 0.035), and Sn5Rh6B2 (hexagonal, P62m, a = 654.80(7) pm, c = 557.32(9) pm, Z = 1, 361 reflexions, 16 parameters, R = 0.039) were prepared by reaction of the elements. SnRh3B1-x crystallizes with the filled U3Si type of structure, a distortion variant of the cubic perovskite; the structure of Sn4Rh6B may be derived from the hexagonal perovskite BaNiO3. Both compounds contain nearly regular Rh6B-octahedra. Sn5Rh6B2 with the Sn5Ir6B2 type of structure contains isolated colums composed of trigonal Rh6B-prisms.
Notes:
Die neuen Verbindungen SnRh3B1-x (x ∼ 0,2, tetragonal, P4/mbm, a = 570,31(2) pm, c = 835,99(8) pm, Z = 4, 514 Reflexe, 26 Parameter, R = 0,026), Sn4Rh6B (hexagonal, P63/mmc, a = 560,01(3) pm, c = 1367,5(1) pm, Z = 2, 746 Reflexe, 17 Parameter, R = 0,035) und Sn5Rh6B2 (hexagonal, P62m, a = 654,80(7) pm, c = 557,32(9) pm, Z = 1, 361 Reflexe, 16 Parameter, R = 0,039) wurden durch Reaktion der Elemente dargestellt. SnRh3B1-x kristallisiert in einem aufgefüllten U3Si-Typ, einer verzerrten Variante des kubischen Perowskits; Sn4Rh6B läßt sich von der Struktur des hexagonalen Perowskits BaNiO3 ableiten. Beide Verbindungen enthalten nahezu reguläre Rh6B-Oktaeder. Sn5Rh6B2 ist isotyp mit Sn5Ir6B2 und enthält isolierte Säulen aus trigonalen Rh6B-Prismen.
Additional Material:
10 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/zaac.19966221218
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