Science

Amblygonite is a fluorophosphate mineral, (Li, Na) AlPO4 (F, OH), composed of lithium, sodium, aluminum, phosphate, fluoride, and hydroxide. It is a relatively common phosphate…

Amarantite is an amaranth-red to brownish mineral with the general formula of Fe23+O(SO4)2.7H2O or Fe3+(SO4)OH. 3H2O. It is a rare secondary mineral that occurs in…

Amakinite is a semi-transparent yellow-green hydroxide mineral belonging to the brucite group that was discovered in 1962. Its chemical formula is written as (Fe2+, Mg)(OH)2.…

In mathematics, a geometric progression (sequence) (also inaccurately known as a geometric series) is a sequence of numbers such that the quotient of any two…

Alunogen also called feather alum and hair salt is a colorless to white (although often colored by impurities, such as iron substituting for aluminum) fibrous…

Abstract structure It is a formal object that is defined by a set of laws, properties and relationships in a way that is logical if…

Alunite is a hydrated aluminum potassium sulfate mineral, formula KAl3(SO4)2(OH)6. It is a sulfate mineral, first discovered in Monti della Tolfa, Rome, in the 15th…

Geometric Mean The geometric mean is a type of average, usually used for growth rates, like population growth or interest rates. While the arithmetic mean…

Aluminite is a hydrous aluminum sulfate mineral with formula: Al2SO4(OH)4·7H2O. It is a hydrous aluminum sulfate, usually occurring in white compact reniform masses. It is…

Alum-(K) is a hydrous potassium aluminum sulfate mineral with formula KAl(SO4)2·12(H2O). It is the mineral form of potassium alum and is referred to as potassium…

Altisite is an exceedingly rare alkaline titanium aluminosilicate chloride mineral with formula [Na3 K6 Ti2 Al2 Si8 O26 Cl3], from alkaline pegmatites. It is a…

A sequence of numbers is said to be Geometric Progression if the ratio of any term and its preceding term is always a constant quantity.…