缺陷白钨矿型 Nd2/3[WO4]的晶体结构

IUCrData Pub Date : 2024-03-01 DOI:10.1107/S2414314624001755

Benjamin Knies , Ingo Hartenbach , M. Weil (Editor)

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引用次数: 0

摘要

在熔融石英安瓿瓶中使用氧化钕（III）、氟化钕（III）和三氧化钨合成钨酸钕（VI）的氟化物衍生物，但未获成功。标题化合物的紫色板状单晶体从块体中出现，其结晶为有缺陷的白钨矿类型，氧化物阴离子围绕钕3+阳离子呈十二面体三方配位，六价钨阳离子位于氧化物四面体的中心。

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Crystal structure of defect scheelite-type Nd2/3[WO4]

The crystal structure of defect-scheelite type Nd_2/3[WO₄] consists of [WO₄]²⁻ tetrahedra and trigonal [NdO₈]^13– dodecahedra.

Neodymium(III) ortho-oxidotungstate(VI) was synthesized as a side-product in an unsuccessful synthesis attempt at fluoride derivatives of neodymium tungstate in fused silica ampoules, using neodymium(III) oxide, neodymium(III) fluoride and tungsten trioxide. Violet, platelet-shaped single crystals of the title compound emerged of the bulk, which crystallize in the defect scheelite type with a trigonal dodecahedral coordination of oxide anions around the Nd³⁺ cations and the hexavalent tungsten cations situated in the centers of oxide tetrahedra.

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