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首页> 外文期刊>Crystallography reports >Structure of the new mineral paratsepinite-Na and its place in the labuntsovite group
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Structure of the new mineral paratsepinite-Na and its place in the labuntsovite group

机译：新型矿物隐锰锌矿-Na的结构及其在拉伏陶土群中的位置

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X-ray diffraction study of high-strontium Ti-nenadkevichite showed that it is a new mineral, which was given the name paratsepinite-Na, sp. gr. C2/m, a double value of the parameter c, and a different distribution of the non-framework cations in comparison with tsepinite-Na. In particular, strontium is located not only in the hexagonal window of the small channel, but also in three positions of the large channel. The characteristics of the mosaic blocks constituting the crystal are studied. It is assumed that polysynthetic twinning in these crystals and many other representatives of this family is associated with the phase transformation occurring in this hydrothermal mineral during its cooling after formation. The comparison of all the three structures of the vuoriyarvite subgroups of the labuntsovite group allows us to explain the disability of vuoriyarvite to absorb strontium from the aqueous solution by its smaller unit-cell volume and higher framework charge in comparison with those of tsepinites. (C) 2004 MAIK "Nauka/Interperiodica".
机译：X射线衍射研究表明，钛是一种新型矿物，被命名为paratsepinite-Na，sp.。 gr。 C2 / m，参数c的双值，和非硒酸钠-钠相比，非骨架阳离子的分布不同。特别地，锶不仅位于小通道的六边形窗口中，而且位于大通道的三个位置中。研究了构成晶体的镶嵌块的特性。假定这些晶体和该族的许多其他代表中的多合成孪晶与这种热液矿物在形成后冷却期间发生的相变有关。通过对Labuntsovite组的Vuoriyarvite亚组的所有三个结构进行比较，我们可以解释Vuoriyarvite不能从水溶液中吸收锶，原因是它的单位晶胞体积较小，而骨架材料的电荷却比Tsepinite高。 （C）2004 MAIK“ Nauka / Interperiodica”。

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