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安徽全椒是国内刚发现有露头、可供开采的海泡石产地。本文介绍采用8种手段鉴定此海泡石的结果并与世界各地的海泡石作了对比。 露头取样系石棉状纤维矿物。干涉一级。二轴晶(+)。2V≌61°,Ng=1.5292,Nm=1.5214,Np=1.5188,最大双折射率0.010,平行消光,正延性。X-光粉末衍射显示,样品是结晶良好的海泡石。红外光谱显示,在3885cm~(-1)有一个小而可以辨别的吸收峰。在3560和3410cm~(-1)有两个宽带,在3250cm~(-1)附近有一个肩峰。在400—1300cm~(-1)范围内,样品显示,在1200—12cm~(-1)有1个宽带,在1070,1020和975cm~(-1)有3个很大的吸收带。在780、690(肩峰在723)和640cm~(-1)有3个宽带,在465cm~(-1)(肩峰在425)有一个大的宽带。差热曲线在125-150和805-818℃有吸热双峰,吸放热转换在740℃。化学分析:SiO_2 52.4,MgO 22.01,H_2O(+)12.42,H_2O(-)6.88,SiO_2/MgO 1.59,分子式近于H_6Mg_3Si_(12)O_(30)(OH)_(10)·6H_2O.电子显微镜显示,样品是纯的海泡石。 对海泡石的物理、化学性质、晶体结构、成因租主要用途也作了讨论。
Anhui Quanjiao is the first domestic outcrop that is available for the production of sepiolite origin. This article describes the results of eight different methods of identifying this sepiolite and compares it with sepiolite from around the world. Outcrops are asbestos-like fibrous minerals. Interference level. Biaxial (+). 2V≌61 °, Ng = 1.5292, Nm = 1.5214, Np = 1.5188, maximum birefringence 0.010, parallel extinction, positive ductility. X-ray powder diffraction showed that the sample was well-crystallized sepiolite. The infrared spectrum shows a small and discernible absorption peak at 3885 cm -1. There are two wide bands at 3560 and 3410 cm -1, and a shoulder near 3250 cm -1. In the range of 400-1300 cm -1, the samples showed one broad band at 1200-12 cm -1 and three large bands at 1070, 1020 and 975 cm -1. There are 3 broad bands at 780, 690 (shoulder at 723) and 640 cm -1, and a large band at 465 cm -1 (shoulder at 425). The differential thermal curve has an endothermic bimodal at 125-150 and 805-818 ° C, and the absorption and exotherm shifts at 740 ° C. Chemical analysis: The molecular formula of SiO 2 52.4, MgO 22.01, H 2 O (+) 12.42, H 2 O (-) 6.88 and SiO 2 / MgO 1.59 shows the formula of H_6Mg_3Si_ (12) O_ (30) (OH) _ (10) · 6H_2O. , The sample is pure sepiolite. The physical, chemical properties of the sepiolite, the crystal structure, the main reasons for rent also made a discussion.