Humite
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Humite is a mineral found in the volcanically ejected masses of Vesuvius. It was first described in 1813 and named for Abraham Hume.
Humite specimen, Italy
Clinohumite
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Clinohumite is an uncommon member of the humite group, a magnesium silicate according to the chemical formula 942. The formula can be thought of as four olivine, plus one brucite. Indeed, the mineral
Two intergrown crystals (1.5 x 1 x 0.5 cm) from Koksha Valley, Badakhshan Province, Afghanistan
Crystal structure of clinohumite in polyhedral representation, a-axis projection, b-horizontal. H atom are blue spheres.