Crystal Structures of Cadmium Phosphidechlorides Cd7P4Cl6and Cd4P2Cl3

✍ Scribed by Andrei V. Shevelkov; Ludmila N. Reshetova; Boris A. Popovkin

• Publisher: Elsevier Science
• Year: 1998
• Tongue: English
• Weight: 290 KB
• Volume: 137
• Category: Article
• ISSN: 0022-4596
• DOI: 10.1006/jssc.1997.7736

✦ Synopsis

The crystal structure of Cd 7 P 4 Cl 6 (I) has been redetermined and of Cd 4 P 2 Cl 3 (II) solved based on the single crystal X ray diffraction experiments. Crystal data: I, cubic space group Pa3, a ‫؍‬ 11.936(1) A s , z ‫؍‬ 4, and R ‫؍‬ 0.0226 for 398 independent reflections and 28 refined parameters; II, cubic space group Pa3, a ‫؍‬ 12.135(1) A s , 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 R 3 [Cd 3 P 2 ] 2؉ and discrete octahedral anions (CdCl 6 ) 4؊ . The structure of II is based on a fcc packing of cadmium atoms with octahedral and tetrahedral interstices filled with either chlorine or phosphorus atoms or P-P pairs.