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六方晶系

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六方晶系(英語:hexagonal crystal system),有一个6次对称轴或者6次倒转轴,该轴是晶体的直立结晶轴C轴。另外三个水平结晶轴正端互成120°夹角。轴角α=β=90°,γ=120°,轴单位a=b≠c。

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
168–173 六方錐面晶族
Hexagonal pyramidal
6 C6 66 [6]+ 霞石鈣霞石 P6, P61, P65, P62, P64, P63
174 三方雙錐晶族
Trigonal dipyramidal
6 C3h 3* [2,3+] 氫氧氯鉛礦 P6
175–176 六方雙錐晶族
Hexagonal dipyramidal
6/m C6h 6* [2,6+] 磷灰石釩鉛礦硼鋁石 P6/m, P63/m
177–182 六方偏方面晶族
Hexagonal trapezohedral
622 D6 226 [2,6]+ 六方鉀霞石英语kalsilite、高溫石英 P622, P6122, P6522, P6222, P6422, P6322
183–186 複六方單錐晶族
Dihexagonal pyramidal
6mm C6v *66 [6] 硫鎘礦纖鋅礦 P6mm, P6cc, P63cm, P63mc
187–190 複三方雙錐晶族
Ditrigonal dipyramidal
6m2 D3h *223 [2,3] 藍錐礦 P6m2, P6c2, P62m, P62c
191–194 複六方雙錐晶族
Dihexagonal dipyramidal
6/mmm(=6/m2/m2/m) D6h *226 [2,6] 綠柱石 P6/mmm, P6/mcc, P63/mcm, P63/mmc

参考文献

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  1. ^ 又名向夫立符號

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六方晶系
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