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辉沸石在我省是首次发现。产于桂阳锡坑岭斑状二长花岗岩和二迭系上统大隆组(P_2d)硅质岩接触的构造破碎带中部,呈脉状产出。共生矿物石英。矿物呈白色、黄色或微红色。形状为薄板状、片状半自形或自形晶。颗粒大小为0.2—20mm。玻璃光泽。硬度为3.5—4。比重为2.18。二轴晶负光性。2V=42°。Ng:1.499,Np:1.492,Ng-Np=0.007。化学全分析结果(％):SiO_2 60.06,Al_2O_3 14.35,TiO_20.01,Fe_2O_3 0.27,FeO 0.13,MgO 0.01,CaO 7.89,Na_2O 0.08,K_2O 0.1,P_2O_50.01,H_2O 17.64,总和100.55。化学式为Ca[Al_2Si_7O_(18)]·7H_2O。最强的粉晶X射线衍射线是9.211(100),4.678(70),4.047(100),3.043(50)。
Uretalite was first discovered in our province. It is produced in the central part of tectonic fractured zone where the Xingkengling porphyritic monzogranite in Guiyang is in contact with the silicic rocks of the Upper Pernambon Dalong Formation (P 2 d), and has a vein-like appearance. Symbiosis mineral quartz. Minerals are white, yellow or reddish. The shape of a thin plate, sheet semi-self or self crystal. Particle size is 0.2-20mm. Shiny glass Hardness of 3.5-4. The proportion is 2.18. Biaxial crystal negative light. 2V = 42 °. Ng: 1.499, Np: 1.492, Ng-Np = 0.007. Chemical analysis (%): SiO 2 60.06, Al 2 O 3 14.35, TiO 2 O 20.01, Fe 2 O 3 0.27, FeO 0.13, MgO 0.01, CaO 7.89, Na 2 O 0.08, K 2 O 0.1, P 2 O 50.01, H 2 O 17.64 and the sum 100.55. The chemical formula is Ca [Al 2 Si 7 O 18] 7H 2 O. The strongest powder X-ray diffraction lines are 9.211 (100), 4.678 (70), 4.047 (100), 3.043 (50).