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首页> 外文期刊>Crystallography reports >Crystal Structure of a New Mineral Lahnsteinite Zn_4(S0_4)(OH)_6 ? 3H_2O
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Crystal Structure of a New Mineral Lahnsteinite Zn_4(S0_4)(OH)_6 ? 3H_2O

机译:新型矿物长石锌矿Zn_4(S0_4)(OH)_6的晶体结构3H_2O

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摘要

A sample of a new mineral from the oxidation zone of the hydrothermal Pb, Zn, Ag Friedrichsse-gen deposit (Rhineland-Palatinate, Germany) was studied by single-crystal X-ray diffraction. The parameters of the triclinic (pseudoorthorhombic) unit cell are found to be a = 8.312(1) ?, b = 14.545(1) ?, c = 18.504(2) ?, α = 89.71 (1)°, β = 90.05(1)°, γ= 90.13(1)°, and V= 2237.3(3) ?~3. The structure is solved by direct methods into the sp. gr. Pl and refined to an R factor of 10.7% using 3788 reflections with FI > 3σ(F) in the isotropic-anisotropic approximation. The crystallochemical formula of lahnsteinite (Z= 8) is [(Zn~(2.6)Fe_(0.3)Cuo 1)~(VI)(OH)_3][Zn~(IV)(OH)_3(H_2O)][SO_4] ? 2H_2O, where the compositions of the layer composed of Zn octahedra and isolated Zn and S tetrahedra are given in square brackets. The mineral under study is chemically and structurally similar to namuwite and is a natural analog of synthetic zinc hydroxide sulfate trihydrate.
机译:通过单晶X射线衍射研究了来自水热铅,锌,银弗里德里希斯根矿床(德国莱茵兰-普法尔茨)的氧化带的一种新矿物的样品。三斜晶系(伪正交)的参数为a = 8.312(1)?,b = 14.545(1)?,c = 18.504(2)?,α= 89.71(1)°,β= 90.05( 1)°,γ= 90.13(1)°,和V = 2237.3(3)α〜3。通过直接方法将结构解析为sp。 gr。在各向同性各向异性近似中,使用FI>3σ(F)的3788次反射将Pl细化为10.7%的R因子。锌长石(Z = 8)的晶体化学式为[(Zn〜(2.6)Fe_(0.3)Cuo 1)〜(VI)(OH)_3] [Zn〜(IV)(OH)_3(H_2O)] [SO_4 ]? 2H_2O,其中由八面体Zn和分离的Zn和S四面体组成的层的组成在方括号中给出。所研究的矿物在化学和结构上均类似于钠白钨矿,并且是合成氢氧化三水硫酸锌的天然类似物。

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