Tags: Chemical Substance, Mineral.

Apophyllite-(KF) or fluorapophyllite is a mineral of the apophyllite group with the chemical formula of KCa4Si8O20(FOH)·8(H2O). It gets the first half of its name fluor from containing more fluorine than hydroxide compared to the other minerals in the apophyllite group. Fluorapophyllite crystallizes in the tetragonal crystal system. Tetragonal minerals have three axes of different lengths and angles of 90 degrees. Fluorapophyllite is an anisotropic mineral and has low relief.

Apophyllite-(KF)-114628.jpg

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