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The Phosphides U 6 Fe 30 P 19 and U 6 Co 30 P 19 with the Yb 6 Co 30 P 19 Structure Type
Author(s) -
Tarasenko Mariya S.,
Albering Jörg H.,
Jeitschko Wolfgang,
Ibers James A.
Publication year - 2014
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.201300603
Subject(s) - crystallography , crystal structure , tin , atom (system on chip) , lattice constant , octahedron , trigonal crystal system , space group , formula unit , coordination number , hexagonal crystal system , materials science , chemistry , analytical chemistry (journal) , x ray crystallography , diffraction , ion , physics , metallurgy , organic chemistry , computer science , embedded system , optics , chromatography
Powders of U 6 Fe 30 P 19 and U 6 Co 30 P 19 were synthesized through the use of tin fluxes. Examination of these powders at 298 K by the Guinier technique led to lattice parameters in the hexagonal system for U 6 Fe 30 P 19 of a = 14.762(2) Å, c = 3.6315(4) Å, c / a = 0.2460, V = 685.3 Å 3 and for U 6 Co 30 P 19 of a = 14.722(3) Å, c = 3.6355(6) Å, c / a = 0.2469, V = 682.4 Å 3 . Single crystals of U 6 Fe 30 P 19 were synthesized and its structure was determined. U 6 Fe 30 P 19 crystallizes in the space group C 1 , 3 h – P $\bar{6}$ of the hexagonal system in the Yb 6 Co 30 P 19 structure type with one formula unit in a cell of dimensions determined at 100 K of a = 14.7206(4) Å, c = 3.6243(1) Å, c / a = 0.2462, V = 680.15(4) Å 3 . The asymmetric unit of U 6 Fe 30 P 19 comprises two U, ten Fe, and seven different P atoms. Each U atom is situated in a trigonal prism of six P atoms; each Fe atom is coordinated either by a tetrahedron or a square pyramid of P atoms. The distances are all less than 2.9 Å. In addition, the structure contains numerous Fe–Fe bonds covering the range from 2.55 to 2.71 Å. The proper space group of the Yb 6 Co 30 P 19 structure type is discussed.