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新的钛、鈪和鋇的矽酸盐矿物——包头矿,是中国科学院和苏联科学院在內蒙某地铁矿产地工作的中苏合作地貭队发現的。包头矿多呈四方状,有时呈长方状,其大小为0.1—1.0厘米,最大为8—10厘米,产于石英脉中(見封三图1)。矿物沿(110)面具有明显的两組解理(見封三图2)。矿物顏色为浅褐至黑色,具玻璃光泽;比重4.42,硬度6。用ПМТ-3型显微鏡測定,显微硬度为769公斤/平方毫米。一軸晶,正光性。Ng=2.16;Np=1.94。Ng—Np=0.22。多色性强,从黑、褐色到浅綠灰
The new silicate minerals of titanium, gallium and barium, Baotou Mine, were discovered by the Sino-Soviet cooperatives working at the Chinese Academy of Sciences and the Soviet Academy of Sciences in a metro area in Inner Mongolia. Baotou mine mostly quadrilateral, sometimes rectangular, its size is 0.1-1.0 cm, the maximum is 8-10 cm, produced in the quartz vein (see cover three Figure 1). There are two distinct sets of cleavages along the (110) surface of the minerals (see Figure 3). Mineral color is light brown to black, with glass gloss; specific gravity 4.42, hardness 6. Measured with a ПМТ-3 microscope, a microhardness of 769 kg / mm2. One-axis crystal, positive optical. Ng = 2.16; Np = 1.94. Ng-Np = 0.22. Multicolor strong, from black, brown to light green ash