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首页> 外文期刊>Zeitschrift fur Anorganische und Allgemeine Chemie >Mg[ZnPO4(H2O)](2)center dot 10H(2)O - a layered hydrous zinc phosphate retrieved from an industrial filter cake residual
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Mg[ZnPO4(H2O)](2)center dot 10H(2)O - a layered hydrous zinc phosphate retrieved from an industrial filter cake residual

机译：Mg [ZnPO4（H2O）]（2）中心点10H（2）O-从工业滤饼残余物中回收的层状含水磷酸锌

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摘要

A phase analysis of an industrial filter cake residual based on X-ray powder diffraction data gave evidence for the existence of a previously unknown hydrous magnesium zinc phosphate. An optical investigation of the sample indicated the presence of milky white crystals (intergrown with polycrystalline rutile) with a maximum diameter of about 150 pm. Aided by an EDX-analysis, a single crystal diffraction study performed at -100 degrees C proofed that the material represents a phase with composition Mg[ZnPO4(H2O)](2)center dot 10H(2)O. Basic crystallographic data are as follows: monoclinic symmetry, space group P2(1)/c, a = 10.702(1), b = 7.4740(9) angstrom, c 11.444(1) angstrom, beta = 104.09(1)degrees, V = 887.8(2) angstrom(3), Z = 2, (R(vertical bar F vertical bar) = 0.048). From a structural point of view the new compound is based on [ZnPO4(H2O)](-) layers containing ZnO3(H2O)- and PO4-tetrahedra arranged at the vertices of a 4.82 net. The layers are parallel to (100) and alternate with sheets of isolated Mg(H2O)(6)(2+)-octahedra and additional interstitial water molecules. Linkage between the tetrahedral and octahedral sheets is provided by hydrogen bonding. The topology and geometry of the tetrahedral layers are very similar to those observed in the minerals veszelyite, herderite and kipushite. According to the DTA-measurements the present compound is stable up to 89 degrees C, where dehydration to an amorphous product occurs.
机译：根据X射线粉末衍射数据对工业滤饼残余物进行相分析，可以证明存在以前未知的含水磷酸镁锌。样品的光学检查表明存在乳白色晶体（与多晶金红石共生），最大直径约为150 pm。在EDX分析的帮助下，在-100摄氏度下进行的单晶衍射研究证明该材料代表具有Mg [ZnPO4（H2O）]（2）中心点10H（2）O的相。基本晶体学数据如下：单斜晶对称性，空间群P2（1）/ c，a = 10.702（1），b = 7.4740（9）埃，c 11.444（1）埃，β= 104.09（1）度，V = 887.8（2）埃（3），Z = 2，（R（垂直线F垂直线）= 0.048）。从结构的角度来看，新化合物基于[ZnPO4（H2O）]（-）层，该层包含布置在4.82网的顶点处的ZnO3（H2O）-和PO4-四面体。这些层平行于（100），并与隔离的Mg（H2O）（6）（2 +）-八面体和其他间隙水分子薄片交替排列。四面体和八面体片之间的连接是通过氢键提供的。四面体层的拓扑结构和几何形状与在矿物维沸石，钙蒙脱石和钾辉石中观察到的非常相似。根据DTA测量，本发明化合物在高达89℃下是稳定的，在该温度下发生脱水成无定形产物。

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