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作者在我国福建省上杭紫金山铜矿中发现了一种具有页片构造的Cu S矿物。其基质相的化学式可表示为Cu1.756S ,与 1 969年在日本发现的斜方蓝辉铜矿的化学式一致 ,这是该矿物在我国的首次发现 ;该矿物页片相的化学式可表示为Cu1.684 S ,是笔者未曾查到有人曾描述过的一种新的Cu S矿物相。该矿物基质相和页片相混合的X射线衍射图谱上的绝大多数峰与合成斜方蓝辉铜矿的衍射峰可对应。由此 ,笔者认为上述成分略有差异的连生的两相晶体结构是相像的 ,只是Cu的缺位有所不同。根据两相混合的X射线粉末衍射图谱得到的晶胞参数为 :a=0 .787( 2 ) ,b=0 .785( 4) ,c=1 .1 0 8( 4)nm。该矿物页片相加温至60℃以上时会变成含Cu更低的新物相。笔者在文中讨论了这种具页片构造的Cu S矿物的形成机理。
The authors found a sheet-structured Cu S mineral in the Zijinshan copper deposit, Shanghang, Fujian Province, China. The chemical formula of its matrix phase can be expressed as Cu1.756S, which is consistent with the chemical formula of orthorhombic blue-chalcopyrite discovered in Japan in 1969. This is the first discovery of this mineral in our country. The chemical formula of this mineral phase can be expressed as Cu1. 684 S, is a new Cu S mineral phase that the author has not found. Most of the peaks on the X-ray diffraction pattern of the mixed mineral matrix phase and the sheet correspond to the diffraction peak of the synthetic orthorhombic blue-chalcopyrite. As a result, I believe that the composition of slightly different even with the two-phase crystal structure is similar, but the vacancy of Cu is different. According to the two-phase mixed X-ray powder diffraction pattern obtained unit cell parameters are: a = 0.787 (2), b = 0.785 (4), c = 1.108 (4) nm. The mineral flakes heat up to above 60 ° C and become a new phase with lower Cu content. The author discusses the formation mechanism of Cu S mineral with sheet structure in this paper.