Fanfaniite
Fanfaniite is a rare phosphate mineral with the chemical formula calcium tetramanganese tetraaluminum hexakisphosphate tetrahydroxide dodecahydrate. It belongs to the apatite group and crystallizes in the hexagonal crystal system. The mineral is typically found in low hardness, with a Mohs hardness of 3 to 4, and has a low density. It exhibits a vitreous to pearly luster and is usually colorless or white. Fanfaniite is classified as a hydrous calcium-manganese-aluminum phosphate mineral.
Composition
- OOxygen54.4%
- PPhosphorus15.8%
- CaCalcium13.6%
- AlAluminium9.2%
- MnManganese4.7%
- HHydrogen2.4%
Overview
Fanfaniite is a rare phosphate mineral with the chemical formula calcium tetramanganese tetraaluminum hexakisphosphate tetrahydroxide dodecahydrate. It belongs to the apatite group and crystallizes in the hexagonal crystal system. The mineral is typically found in low hardness, with a Mohs hardness of 3 to 4, and has a low density. It exhibits a vitreous to pearly luster and is usually colorless or white. Fanfaniite is classified as a hydrous calcium-manganese-aluminum phosphate mineral.
Etymology
Fanfaniite is named after Luca Fanfani, in recognition of his contributions to mineralogy.
How to recognize it
Fanfaniite can be identified by its low hardness of 3 to 4 on the Mohs scale, its colorless or white color, and its vitreous to pearly luster. It has a low density and a white streak. It is often confused with other hydrous phosphate minerals due to its similar appearance and properties.