Crystal structures of cadmium phosphidechlorides Cd7P4Cl6 and Cd4P2Cl3статья
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Аннотация:The crystal structure of Cd7P4Cl6 (I) has been redetermined and of Cd4P2Cl3 (II) solved based on the single crystal X ray diffraction experiments. Crystal data: I, cubic space group Pa3, a = 11.936(1) Angstrom, z = 4, and R = 0.0226 for 398 independent reflections and 28 refined parameters; II, cubic space group Pa3, 12.135(1) Angstrom, z = 8, and R = 0.0256 for 466 independent reflections and 29 refined parameters. Both phases crystallize in a space group Pa3, but have quite different crystal structures. The structure of I comprises a three-dimensional cationic net infinity(3)[Cd3P2](2+) and discrete octahedral anions (CdCl6)(4-). The structure of II is based on a fee packing of cadmium atoms with octahedral and tetrahedral interstices filled with either chlorine or phosphorus atoms or P-P pairs. (C) 1998 Academic Press.