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笔者于1985—1986年,对华北地区岩浆岩型磷灰石矿床进行研究时,在山西省临县紫金山的钛榴霞石正长斑岩中,发现了与苏联的达乌松矿(Tausonite)相似的矿物,即等轴锶钛石。该矿物在我国的首次发现,对这一地区碱性岩的矿物学和岩石学研究无疑是很有意义的。本区等轴锶钛石一般为淡棕色,呈立方体或不规则柱状,折射率N=1.977±0.002,比重为4.66,均质体,个别具光性异常并呈环带构造,晶胞参数a_0=3.905A,空间群P_(m3m),晶胞体积v=59.55A。本文重点对该矿物的地质产状、矿物共生组合、物理性质与光学性质、矿物化学成分及X射线分析进行了研究。笔者认为本区等轴锶钛石是富钛富碱贫硅的碱性岩浆中早期结晶的产物。
In 1985-1986, the authors studied the magmatic rock-type apatite deposits in North China and found that the Tausonite (Tausonite) ) Similar minerals, namely equiaxed strontium titanium. The discovery of this mineral for the first time in our country undoubtedly makes sense for the mineralogy and petrology of alkaline rocks in this area. In this region, the strontium-titanium-titanium alloy is generally light brown in color with cubes or irregular columns with a refractive index of N = 1.977 ± 0.002 and a specific gravity of 4.66. The homogeneous body has individual phototropism and an annular structure, and the unit cell parameters a_0 = 3.905A, space group P_ (m3m), unit cell volume v = 59.55A. This paper focuses on the geology of the mineral properties, mineral assemblages, physical and optical properties, mineral chemical composition and X-ray analysis were studied. I believe that this area equiaxed strontium titanium is rich in titanium-rich alkali-poor magma in the early crystallization of the product.