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富锡硼镁铁矿是硼镁铁矿的含锡亚种。它产于湖南常宁县七里坪镁质矽卡岩硼矿床中。矿物中SnO_2变化范围为4.6—12.0%,其分子式为(Mg_1.64Fe~(2+_(0.35))Mn~(2+_(0.01))(Fe~(3+_(0.55))Sn_(0.16)Mg(0.23))BO_5,这是迄今未见详细报导过的。笔者从矿物的光学物理性质、化学成分、X射线晶体学以及晶体化学等方面进行了研究。同时,与它的类似矿物在晶体学方面作了对比讨论。从以上研究中得出结论:Sn~(4+)在结构中占据Fe~(3+)的位置,并以伴随着的Mg~(2+)作电荷补偿。还提出了Sn元素在硼镁铁矿中不仅作为微量元素存在,而且可以作为造种元素存在的新见解。
Fusilite is a tin-bearing subspecies of bauxite. It is produced in Changning County, Hunan Qiliping magmatic skarn boron deposit. The content of SnO_2 in mineral varies from 4.6% to 12.0%, and the formula is (Mg_1.64Fe ~ (2 + _ (0.35)) Mn ~ (2 + _ (0.01)) (Fe ~ (3 + _ (0.55)) Sn_ 0.16) Mg (0.23)) BO_5, which has not been reported in detail so far.The author studied the optical and physical properties, chemical composition, X-ray crystallography and crystal chemistry of minerals.At the same time, with its similar minerals In the aspect of crystallography, it is concluded that Sn 4+ occupies the position of Fe 3+ in the structure and compensates with the charge of Mg 2+. It is also proposed that the Sn element not only exists as a trace element in the boraxite, but also serves as a new insight into the existence of the element for seed production.