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 Cmc2₁ (No. 36) space group symmetry of the orthorhombic crystal system. This also includes Ccm2₁, Bb2₁m, Bm2₁b, A2₁ma, and A2₁am.