三斜晶系 Triclinic crystal system
（重定向自Triclinic System）
三斜晶系的矿物既无对称轴也无对称面，有的属于该晶系的矿物甚至连对称中心也没有。三个结晶轴均斜交α≠β≠γ≠90;a≠b≠c.主折射率有三个方向并且与结晶轴无关。
Triclinic System
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英语百科
Triclinic crystal system 三斜晶系
（重定向自Triclinic System）
In crystallography, the triclinic crystal system is one of the 7 crystal systems. A crystal system is described by three basis vectors. In the triclinic system, the crystal is described by vectors of unequal length, as in the orthorhombic system. In addition, no vector is at right angles (90°) orthogonal to another.