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.

引用

页码：512 / 516

页数：5

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