Category:Minerals in space group 31

This is a non-diffusing subcategory of Category:Orthorhombic minerals. It includes minerals that can also be found in the parent category, or in diffusing subcategories of the parent.

This category lists minerals that display the Pn2₁m (No. 31) space group symmetry of the orthorhombic crystal system. This also includes P2₁mn, P2₁nm, and Pmn2₁