【摘要】 菱水碳铁镁石是一种稀少矿物。产子超基性岩型纤蛇纹石石棉中的纤维状菱水碳铁镁石,在我国还是首次发现。该矿物单晶直径为200～300A,无色透明或呈浅灰白色。低突起,干涉色为一级灰——一级灰白,平衍消光,正延长。一轴晶正光性,No=1.541、Ne=1.556、Ne-No=0.015。电子探针分析,其主要成份有Si,Mg,Fe,Al,Mn等,而且Fe明显多于Al。化学式为:Mg₆Fe₂Co₃（OH）₁₆·4H₂O。六方晶系,晶胞参数为a₀=3.098±0.005A,c₀=23.564±0.03A。x射线衍射最强线为:7.840（100）,3.926（60）,2.603（50）,1.541（30）,2.332（20）。z=1。更多还原

【Abstract】 Pyroaurite is a rare mineral. Fibrous pyroaurite occured in chrysot-ile of ultrabasic rock type is found for first time in china. The size ofmineral is 200-300 A in diameter, white or light grey-white in colour, lowrelief, first-order colour of grey-white in interference colour, parallelextinction, positive elongation, optically uniaxial（+）, N₀=1.541, N₆=1.556. Electron probe analysis is given: Si, Mg, Fe, Al, Mn and Fe more thanAl. Formula is Mg₆Fe₂CO₃（OH）₁₆·4H₂O. Mineral is hexa gonal system with a₀=3.098±0.005A, C₀=23.564±0.03A. The strongest lines of the x-ray diffraction pattern are: 7.84（100）,3.926（90）, 2.603（50）, 1.541（30）, 2.332（20）.更多还原