Synthese und Kristallstruktur von Cs 3 Y 7 Se 12
1997; Wiley; Volume: 623; Issue: 10 Linguagem: Inglês
10.1002/zaac.19976231005
ISSN1521-3749
AutoresMatthias Folchnandt, Thomas Schleid,
Tópico(s)Solid-state spectroscopy and crystallography
ResumoSynthesis and Crystal Structure of Cs 3 Y 7 Se 12 The oxidation of yttrium metal with selenium in the presence of CsCl (7 d, 700°C, evacuated silicia tubes) results in the formation of pale yellow, lath‐shaped single crystals of Cs 3 Y 7 Se 12 . The crystal structure (orthorhombic, Pnnm, Z = 2, a = 1272.8(3), b = 2627.7(5), c = 413.32(8) pm) consists of edge‐ and vertex‐connected [YSe 6 ] octahedra forming a rocksalt‐related network [Y 7 Se 12 ] 3− . One‐dimensional infinite channels along [001], apt to take up extra cations, provide coordination numbers of 6 and 7 + 1, respectively, for two crystallographically different Cs + .
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