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Preparation and crystal structure of the Copper Silicon Polyphosphide Cu 4 SiP 8
Author(s) -
Kaiser Peter,
Jeitschko Wolfgang
Publication year - 1996
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.19966220109
Subject(s) - crystallography , diffractometer , crystal structure , octahedron , copper , silicon , phosphorus , tetrahedron , oxidation state , chemistry , materials science , metal , metallurgy
The new compound Cu 4 SiP 8 was prepared by solid state reaction of the elemental components. It crystallizes with a new structure type, which was determined from single‐crystal X‐ray diffractometer data: I4 1 /a, a = 1 218.6(2) pm, c = 573.2(2) pm, Z = 8, R = 0.023 for 970 structure factors and 31 variable parameters. Tetrahedral SiP 4 groups are linked via additional phosphorus atoms to a three‐dimensionally infinite silicon phosphorus network, accommodating Cu 2 pairs with octahedral phosphorus coordination as is known for the closely related structure of CuP 2 . Using oxidation numbers the compound may be rationalized by the formula (Cu +1 ) 4 Si +4 (P 0 ) 4 (P −2 ) 4 in agreement with the Zintl‐Klemm concept.