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锌赤铁矾是1964年在我国首次发现的一种硫酸盐类新矿物。它的实验化学式是(Zno_(0.64)Mg_(0.27)Mn_(0.11)Fe_(0.05)~(2+))_(1.07)Fe_(1.00)~(3+)(SO_4)_(1.96)(OH)·6.61H_2O,理论分子式为ZnFe~(3+)(SO_4)_2(OH)·7H_2O。本文在前人工作的基础上,利用四圆衍射仪对其结构进行了精测。根据所得实验资料,着重对如下晶体化学问题做了讨论;(1)氢键;(2)多面体的畸变;(3)原子的热运动;(4)结构和物性的关系;(5)Zn~(2+)和Mg~(2+)的类质同象等。同时,对锌赤铁矾的某些谱学特征和它与类同矿物的关系做了对比和讨论。
Zirconia is the first sulfate-type mineral discovered in China in 1964. The experimental chemical formula of (Zno_ (0.64) Mg_ (0.27) Mn_ (0.11) Fe_ (0.05) ~ (2 +)) _1.07 Fe_ (1.00) ~ (3 +) (SO_4) _ (1.96) ) · 6.61H_2O, the theoretical formula is ZnFe ~ (3 +) (SO_4) _2 (OH) · 7H_2O. Based on the work of predecessors, this paper uses the four-circle diffractometer to measure the structure. Based on the experimental data obtained, the following crystal chemistry issues are discussed: (1) hydrogen bonding; (2) distortion of polyhedrons; (3) thermal motion of atoms; (4) relationship between structure and physical properties; (2+) and Mg ~ (2+) isomorphism and so on. At the same time, some spectroscopic characteristics of zinc-hectorite and its relationship with similar minerals are compared and discussed.