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立方晶系

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立方晶系,也叫等轴晶系,它有4个三重对称轴以及3个互相垂直的4次对称轴或者3个相互垂直的二重对称轴。其中的3个互相垂直的4次对称轴或者3个相互垂直的二重对称轴是晶体结晶轴。轴角α=β=γ=90o,轴单位a=b=c。所以凡是等轴晶系的晶体在各个方向上的性质——光学性质、电磁性、折射率都相同。即具有所谓各向同性。

立方晶系 简单立方 体心立方 面心立方
简单立方 体心立方 面心立方

分類

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# 點群 空間群
名稱 國際標記法 熊夫利標記法英语Schoenflies notation[1] 軌形英语Orbifold 考克斯特符號英语Coxeter notation
簡單立方

面心立方

體心立方
195–197 四分半面晶族(Tetartoidal) T 23 332 [3,3]+ 輝銻鎳礦英语Ullmannite氯酸钠 P23 F23 I23
198–199 P213 I213
200–204 偏方二十四面晶族(Diploidal) Th 2/m3(=m3) 3*2 [3+,4] 黃鐵礦 Pm3, Pn3 Fm3, Fd3 I3
205–206 Pa3 Ia3
207–211 五角二十四面晶族(Gyroidal) O 432 432 [3,4]+ 碲金銀礦英语Petzite P432, P4232 F432, F4132 I432
212–214 P4332, P4132 I4132
215–217 六四面體晶族(Hextetrahedral) Td 43m *332 [3,3] 閃鋅礦 P43m F43m I43m
218–220 P43n F43c I43d
221–230 六八面體晶族(Hexoctahedral) Oh 4/m32/m(=m3m) *432 [3,4] 方鉛礦鑽石尖晶石 Pm3m, Pn3n, Pm3n, Pn3m Fm3m, Fm3c, Fd3m, Fd3c Im3m, Ia3d

脚注

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  1. ^ 又名向夫立符號

參見

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立方晶系
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