Carobbiite | |
Formula: | KF |
Imasymbol: | Crb[1] |
Molweight: | 58.10 gm |
Strunz: | 3.AA.20 |
Dana: | 9.1.1.4 |
System: | Isometric - Hexoctahedral |
Class: | m3m (4/m 3 2/m) - Hexoctahedral |
Symmetry: | Cubic |
Unit Cell: | 152.27 ų |
Colour: | Colorless |
Cleavage: | Distinct/Good |
Mohs: | 2-2.5 |
Luster: | Vitreous (Glassy) |
Streak: | White |
Diaphaneity: | Transparent |
Gravity: | 2.505 |
Density: | 2.524 |
Opticalprop: | Isotropic, n=1.362. |
Carobbiite, chemical formula KF (potassium fluoride), is a rare, soft (Mohs 2 - 2.5), colourless cubic mineral.[2] It is found at Monte Somma, Somma-Vesuvius Complex, Province of Naples, Campania, Italy. It was discovered in 1956 by Italian geologist Guido Carobbi (1900–1983).[3] It has also been reported from Hokkaido, Japan.[4]