晶族（crystal family）是晶体按对称性分类时的第一级类别， 共有低级晶族、中级晶族和高级晶族等3个晶族。
... 糊用聚氯乙烯树脂、分散型PVC树脂、dispersion PVC resin、paste PVC resin、PVC-P 晶族、crystal family 族、group、family ...
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单面晶族 monohedral class
三方全面象晶族 trigonal holohedral class
正方副象半面象晶族 tetragonal paramorphic hemihedral class
六方对映半面象晶族 hexagonal enatiomorphic hemihedral class
菱形极半面象晶族 rhombohedral hemimorphic hemihedral class
菱形异极半面象晶族 rhombic hemimorphic hemihedral class
低级晶族 lower category
高级晶族 Higher category
中级晶族 intermediate category
在低级晶族光学特性的研究中，光性符号的确定对未知晶体及矿物的鉴定有着重要的意义。
In the study of optical properties of low class crystal system, the identification of optic sign has important meaning to unknown crystal and mineral determination.
晶圆片搀杂剂可以在元素周期表的III和V族元素中发现。
Dopants for silicon wafers are found in Groups III and V of the Periodic Table of the Elements.
基于晶体场理论，系统地给出了铁族离子32个点群的晶场势，并研究了坐标系取法不同时晶场势的变化。
Base on the crystal-field theory, all of the crystal-field potentials of 32point-group are given for family iron ions and the relationships of which with different coordinate-system are studied.
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