Ba4Mn2Ag2O(AsO4)4, a barium manganese oxide-arsenate showing nonlinear O-Ag-O dumbbells

被引：1
|
作者：
Staack, M [1 ]
Müller-Buschbaum, H [1 ]
机构：
[1] Univ Kiel, Inst Anorgan Chem, D-24098 Kiel, Germany
来源：
ZEITSCHRIFT FUR NATURFORSCHUNG SECTION B-A JOURNAL OF CHEMICAL SCIENCES | 1998年 / 53卷 / 5-6期
关键词：
barium; manganese; silver; oxide-arsenate; crystal structure;
D O I：
10.1515/znb-1998-5-602
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
Single crystals of Ba4Mn2Ag2O(AsO4)(4) have been prepared by solid state reactions using metallic silver as reactant. X-ray techniques led to monoclinic symmetry, space group D-2h(2)-P2(1)/m, a = 8.739(2), b = 5.912(1), c = 9.440(2) Angstrom, beta = 115.21(1)degrees, Z = 1. The crystal structure is characterized by O-Ag-O dumbbells, bond angle = 165,3 degrees, containing one oxygen atom not associated with the arsenate groups. Considering these facts Ba4Mn2Ag2O(AsO4)(4) may be seen as an oxide-arsenate or an oxoargentate(I)-arsenate. Assuming the oxidation state +II for manganese, as confirmed by magnetic measurements, the compound has an oxygen deficite which was accounted for by a split position model.
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收藏
页码：512 / 516
页数：5
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