Amphibole Group

Complex family of hydrous double-chain silicateThe most abundant group of minerals in Earth's crust, the structure of silicates are dominated by the silica tetrahedron, SiO44-, with metal ions occurring between tetrahedra). The mesodesmic bonds of the silicon tetrahedron allow extensive polymerization and silicates are classified according to the amount of linking that occurs between the minerals. Amphiboles are common in terrestrial metamorphicRocks that have recrystallized in a solid state due to changes in temperature, pressure, and chemical environment. and igneous rocks, forming in the presence of water. Except for kaersutite amphibole that is commonly found in Martian shergottitesIgneous stony meteorite with a Martian origin consisting mainly of plagioclase (or a shocked glass of plagioclase composition) and pyroxene. They are the most abundant type of SNC meteorites and the type member is the Shergotty meteorite, which fell in India in 1865. Shergottites are igneous rocks of volcanic or, amphiboles in general are not often found in extraterrestrial materials.

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