KCaFeSi2O6

KCaFeSi2O6 is a mineral belonging to the pyroxene group. Its chemical formula indicates that it is a potassium calcium iron silicate. This particular composition is known as an end-member of a solid solution series within the pyroxene crystal structure. The mineral is a member of the clinopyroxene subclass, meaning it crystallizes in the monoclinic system. It is a relatively rare mineral, typically found in alkalic igneous rocks. Its occurrence is often associated with environments rich in potassium and calcium, and where iron is present in significant amounts. The color of KCaFeSi2O6 can vary, often appearing dark brown to black. Its physical properties, such as hardness and specific gravity, are consistent with those of other pyroxene minerals. The structure of KCaFeSi2O6 features the characteristic chain silicate arrangement of the pyroxene group, with [SiO4] tetrahedra linked together in single chains. Cations, in this case potassium, calcium, and iron, occupy the interstitial sites between these chains. Understanding the specific chemical composition helps in classifying and identifying this mineral within the broader pyroxene family.