ISSN:
0044-2313
Keywords:
(strontium, europium, barium, uranium) nickel phosphides
;
arsenides
;
crystal structure
;
Chemistry
;
Inorganic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Description / Table of Contents:
Ternary Phosphides and Arsenides of Nickel with a Metal: Non-Metal Ratio of 2:1Several new ternary phosphides and arsenides of nickel were prepared by reaction of the elements. SrNi5P3, SrNi5As3, and EuNi5As3 crystallize in the LaCo5P3 structure with the following lattice constants [Å]: \documentclass{article}\pagestyle{empty}\begin{document}$$ \begin{array}{*{20}c}{} \hfill & {\rm a} \hfill & {\rm b} \hfill & {\rm c} \hfill\\{{\rm SrNi}_{\rm 5} {\rm P}_3 :} \hfill & {3.618(1)} \hfill & {11.789(2)} \hfill & {11.597(2)} \hfill\\{{\rm SrNi}_5 {\rm As}_3 :} \hfill & {3.759(1)} \hfill & {12.239(2)} \hfill & {11.890(2)} \hfill\\{{\rm EuNi}_{\rm 5} {\rm As}_3 :} \hfill & {3.742(1)} \hfill & {12.215(2)} \hfill & {11.839(2)} \hfill\\\end{array} $$\end{document}BaNi9P5 (a = 6.534(1) Å, c = 10.847(2) Å) and BaNi9As5 (a = 6.760(1) Å, c = 11.226(2) Å) crystallize in a new type of structure (P63/mmc, Z = 2). The characteristic polyhedra are trigonal Ni-antiprisms centered by P or As atoms and trigonal Ni-prisms with vacant centres and sides capped by non-metal atoms. U2Ni12P7 (a = 9.077(2) Å, c = 3.694(1) Å) has a Zr2Fe12P7 structure (P6, Z = 1).
Notes:
Durch Erhitzen der jeweiligen Elemente konnten einige neue ternäre Nickelphosphide und -arsenide dargestellt werden. SrNi5P3, SrNi5As3 und EuNi5As3 kristallisieren im LaCo5P3-Typ (Cmcm, Z = 4) mit folgenden Gitterkonstanten [Å]: \documentclass{article}\pagestyle{empty}\begin{document}$$ \begin{array}{*{20}c}{} \hfill & {\rm a} \hfill & {\rm b} \hfill & {\rm c} \hfill\\{{\rm SrNi}_{\rm 5} {\rm P}_3 :} \hfill & {3,618(1)} \hfill & {11,789(2)} \hfill & {11,597(2)} \hfill\\{{\rm SrNi}_5 {\rm As}_3 :} \hfill & {3,759(1)} \hfill & {12,239(2)} \hfill & {11,890(2)} \hfill\\{{\rm EuNi}_{\rm 5} {\rm As}_3 :} \hfill & {3,742(1)} \hfill & {12,215(2)} \hfill & {11,839(2)} \hfill\\\end{array} $$\end{document}BaNi9P5 (a = 6,534(1) Å, c = 10,847(2) Å) und BaNi9As5 (a = 6,760(1) Å, c = 11,226(2) Å) bilden einen neuen Strukturtyp (P63/mmc, Z = 2), bei dem trigonale Ni-Antiprismen mit je einem P-bzw. As-Atom in der Mitte sowie allseitig überdachte trigonale Ni-Prismen mit unbesetzten Zentren strukturbestimmend sind. U2Ni12P7 (a = 9,077(2) Å, c = 3,694(1) Å) kristallisiert in der Zr2Fe12P7-Struktur (P6, Z = 1).
Additional Material:
4 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/zaac.19915970120
