热液型水晶晶体形貌标型特征研究

Study on Typomorphic Features of Crystal Morphology of Quartz Crystal in Hydrothermal Type

利用微分干涉显微镜等测试手段, 对不同类型的水晶晶体各族晶面的形貌特征进行观察和描述, 采用编码统计方式定量表达晶体形态与生长环境条件的关系. 测试了水晶晶体中包裹体的均一温度、盐度等参数, 水晶晶体各族晶面c∶R∶r的生长速率比例主要与环境温度、过饱和度有关: 低温、低过饱和度时, 晶体以柱状晶习占优势; 温度及过饱和度升高,晶体生长速度加快, 晶面之间生长速率差异相对减少, 则以菱面体状晶习占优势.

A careful study is made in the crystal morphology and surface structures of natural quartz with differential interference microscope and mineral microscope.With code and test data the relation of various quartz and growth conditions is discussed.From the study of the crystal morphology,surface structures and inclusions,and the basis of internal structure,the connection between the crystal morphology and growth conditions can be revealed.Temperature and super-saturation change the growth velocity of crystal.It is concluded that quartz presents prismatic habit at low temperature and super-saturation yet rhombohedral habits at high temperature and super-saturation condition.