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在白云鄂博地区发现的水磷钙钍石呈脉状产于元古代变质石英砂岩中,共生矿物有透辉石、金红石、磷灰石、重晶石、赤铁矿和黄铁矿等。颜色从浅黄色到红褐色乃至黑色,从透明至半透明以至不透明。红褐色水磷钙钍石为玻璃光泽,比重3.42,摩氏硬度4.28—4.29,磁化率(2.34—3.99)×10~(-6)C·G·S·m cm~3/g,平均折光率No=1.65,Ne=1,66,一轴晶(+)。 水磷钙钍石的化学式为:(Ca_(0.5751)Th_(0.4502)U_(0.0070)La_(0.0030))_(1.0353)(P_(0.7578)S_(0.0928))_(0.8506)O_4(CO_3)_(0.1603),0.9H_2O。六方晶系,晶胞参数a=6.94A,c=6.51A。
Phosphorcalcite found in the Bayan Obo region is vein-shaped in Proterozoic metamorphic quartz sandstone, and the symbiotic minerals are diopside, rutile, apatite, barite, hematite and pyrite. Colors range from light yellow to reddish brown and even black, from clear to translucent to opaque. The reddish brown phosphoricite and thorium stone are glassy, the specific gravity is 3.42, the Mohs hardness is 4.28-4.29, the magnetic susceptibility (2.34-3.99) × 10 -6 C · G · S · m cm -3 / g, the average refraction Rate No = 1.65, Ne = 1,66, uniaxial (+). The chemical formula of water-phosphorus calcium-thorium stone is as follows: (0.5751) Th 0.4502 U 0.0070 La 0.0030 1.0353 P 0.7578 S 0.0928 0.8506 O 4 (CO 3) _ (0.1603), 0.9 H 2 O. Hexagonal system, cell parameters a = 6.94A, c = 6.51A.