On the structure of Ba2ZnAlF9 and to the knowledge of Ba2MeIIMeIIIF9 with MeIIZn,Ni,Co,Mg and MeIIIAl,Ga,Ni,Co,Fe

✍ Scribed by Thomas Fleischer; Rudolf Hoppe

• Publisher: Elsevier Science
• Year: 1980
• Tongue: English
• Weight: 47 KB
• Volume: 16
• Category: Article
• ISSN: 0022-1139
• DOI: 10.1016/s0022-1139(00)84138-x

✦ Synopsis

Single crystals of Ba,ZnAlF, were prepared by heating of the binary compounds in gold-tubes (750°C,30d) and cooling slowly (POoC/d) to roomtemperature. Spacegroup Pnma; c-7,36, 2, a=17,84, 2, b-5,54, R, 8=90,0°, Z-4, R-O,076 1282 unique (hkl), MO-K,. Characteristic structural features are octahedral groups [ZnF,] andCAlF,], which are stacked up to double chains. The octahedra are corner linked along [Ool]. C.N. of Ba is 12. Four octahedra of [ZnF,] and [AlF,] form a 'ring', in which two F-are disposed inside and two F-outside of the plane of the ring. Ba,ZnGaF, adopts the spacegroup P2,/c.