Aluminite is a hydrous aluminium sulfate mineral with formula: Al2SO4(OH)4·7(H2O). WikipediaNaming It is an earthy white to gray-white monoclinic mineral which almost never exhibits crystal form. In Crystallography, the monoclinic Crystal system is one of the 7 lattice Point groups A crystal system is described by three vectors. It forms botryoidal to mammillary clay-like masses. Clay is a naturally occurring material composed primarily of fine-grained Minerals which show plasticity through a variable range of Water content, and It is very soft Mohs hardness of 1 with a specific gravity of 1. The Mohs scale of mineral hardness characterizes the scratch resistance of various Minerals through the ability of a harder material to scratch a softer material Specific gravity is defined as the ratio of the Density of a given solid or liquid substance to the density of water at a specific temperature and pressure typically 66—1. 7. It forms as an oxidation product of pyrite and marcasite along with aluminous silicates and clays. The Mineral marcasite, sometimes called white iron pyrite, is Iron Sulfide (FeS2
It was first described in 1807 from Halle, Saxony-Anhalt, Germany. Germany, officially the Federal Republic of Germany ( ˈbʊndəsʁepuˌbliːk ˈdɔʏtʃlant is a Country in Central Europe. It is also known as alley stone and websterite (named after English geologist Thomas Webster). Thomas Webster (1773 – December 26, 1844) Scottish Geologist, was born in Orkney, and was educated at Aberdeen.
Aluminite is used by tile & masonry workers to reduce the setting time of cementitious mortars.
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