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香花石(Ca3Li2[BeSiO4]3F2,I213)是1958年在中国发现的第一个新矿物,它在地球上产出非常稀少.近年来对香花石的研究报道也很少.本文对复杂的香花石晶体形态进行了测量,并借助背散射电子衍射(electron backscattered diffraction,EBSD)技术发现了香花石的双晶结构,双晶关系的分析是基于极图进行的.香花石的双晶律是双晶面{110}.这种双晶律与以前用结晶学理论分析推测出的香花石双晶律完全相同,本文的散射电子衍射实验研究证实了以前对香花石双晶律的分析结论.这种香花石的双晶结构自1958年香花石被发现以来从未报道过.
In1958, the first new mineral discovered in China, Ca3Li2 [BeSiO4] 3F2 and I213, produced very little on earth .Recent studies on the stone are rare. The crystal morphology of the stone was measured and the double crystal structure of the stone was found by backscattered electron diffraction (EBSD) technique. The analysis of the twin relationship was based on the pole figure. The double crystal law of the stone is double Crystal plane {110} .This birefringence is exactly the same as the bimodal law previously estimated by the theory of crystallography. The experimental results of scattering electron diffraction in this paper confirm the previous analysis of bimodal law of the fragrant stone. The bimodal structure has never been reported since 1958 when the stone was discovered.