✦ LIBER ✦

Structural and magnetic studies on BaMnFeF7 and related compounds

✍ Scribed by D. Babel; H. Holler; A. de Kozak; M. Samouël

Publisher: Elsevier Science
Year: 1980
Tongue: English
Weight: 38 KB
Volume: 16
Category: Article
ISSN: 0022-1139
DOI: 10.1016/s0022-1139(00)84135-4

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✦ Synopsis

The crystal structure of the monoclinic compound BaMnFeF7 was determined (a = 553.2(l), b = lo98.o(2), c = 918.3(l) pm, B = 94.7 (l)', z = 4, space group P2I/c, R = 0.03 for 1771 independent single crystal reflections). Magnetic susceptibility and Mijssbauer measurements show the compound becoming antiferromagnetic at TN = 85 K. The structural and magnetic properties of BaMnFeF7 are compared to those of the trigonal weberite Na2MnFeF7. Whereas the FeFd octahedra behave similar in both structures and have two terminal ligands not participating in linking with MnFG octahedra only, the barium compound is unique in containing binuclear Mn2Flo groups of edge-sharing octahedra. Further structural and magnetic relations are discussed.

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