| 晶系 | 点群 | 条件 | | 三斜晶系 | (1) | 无限制条件 | | 单斜晶系 | (2) | h and/or l ⊂ Z* a, k ⊂ Z* (second setting) | | 斜方晶系 | (2 2 2) | h and k and l ⊂ Z* | | 四方晶系 | (4), (4 2 2) | h and k and l ⊂ Z*, (h ≠ k) | | 三方晶系 | (3), (3 2) | h and k and l ⊂ Z*, (h ≠ k) | | 六方晶系 | (6), (6 2 2) | h and k and l ⊂ Z*, (h ≠ k) | | 立方晶系 | (2 3), (4 3 2) | h and k and l ⊂ Z*, (h ≠ k, k ≠ l, l ≠ h) |
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