摘要
四川九龙绿柱石晶体形态有短柱状、板柱状、扁平板状以及板锥状晶体,晶体上出现的单形有平行双面c{0001}、六方双锥p{1011}s、{1121}、六方柱m{1010}、a{1120}以及复六方双锥v{2131}、n{3141}。利用微分干涉显微镜等手段,对九龙绿柱石晶体进行了形貌研究,发现{0001}{、1121}和{1010}面上具有丰富的表面微形貌。晶面上的六边形溶蚀丘、六边形生长丘、拉长六边形螺旋生长纹和三角生长丘体现了相应面网结构的对称性,螺旋生长纹发生束合、三角形圆化等现象均反映了环境条件的变化。
According to the habit of beryl crystal and the relation of intergrowth, the beryls which were found in Jiulong county, Sichuan province were classified as short prismatic, tabular prismatic, flat tabular and tabular pyramidal crystals.There are some simple crystal forms： pinakoid （ c ）, hexagonal prism （ rn ＆ a ）, hexagonal bipyramid （ s ＆ p ） and dihexagonal bipyramid（ n ＆ v ）. By means of differential interference microscopy, and so on, the authors studied the morphology of beryl crystals from jiulong county. Pinakoid, hexagonal prism and hexagonal bipyramid possess abundant surface microtopography among the surfaces of beryl crystals. Hexagonal corrosion hillock, elongated hexagonal spiral growth layers and triangular growth hillock reflect the symmetrical characteristics of surface-net structure. Bunching of spiral growth lamellae, the roundness of triangle and so on all reflect conditional variations in the environment, q^nis paper also discussed growth mechanism of beryl and the influence of growing conditions on beryl crystal morphology.
出处
《矿物学报》
CAS
CSCD
北大核心
2005年第2期191-196,共6页
Acta Mineralogica Sinica
基金
广西自然科学基金资助项目(桂科自0229054)
关键词
绿柱石
晶体形貌
表面微形貌
晶体结构
环境条件
九龙
beryl
crystal morphology
surface micmtopography
crystal structure
growth condition
Jiulong county
Sichuan
