Carobbiite, chemical formula KF (potassium fluoride), is a rare, soft (Mohs 2 – 2.5), colorless cubic mineral. It consists of Potassium fluoride, a rare, soft, colorless cubic mineral. 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). It has also been reported from Hokkaido, Japan.
General information
- Formula: KF
- Hardness: 2 – 2½
- Specific Gravity: 2.505
- Crystal System: Isometric
- Member of: Halite Group
Properties
- Color: Colorless
- Cleavage: Distinct/Good On {001}.
- Density: 2.505 g/cm3 (Measured) and 2.528 g/cm3 (Calculated)
Occurrence: In stalactites in cavities in lava.
Association: Halite, mercallite, hieratite.
Distribution: On Vesuvius, Campania, Italy.
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