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A silicate mineral is generally an inorganic compound consisting of subunits with the formula [SiO 2+n] 2n−. Although depicted as such, the description of silicates as anions is a simplification. Balancing the charges of the silicate anions are metal cations, M x+. Typical cations are Mg 2+, Fe 2+, and Na +.
This list gives an overview of the classification of minerals (silicates) and includes mostly International Mineralogical Association (IMA) recognized minerals and its groupings. This list complements the List of minerals recognized by the International Mineralogical Association series of articles and List of minerals. Rocks, ores, mineral ...
A silicate is any member of a family of polyatomic anions consisting of silicon and oxygen, usually with the general formula [SiO(4-2x)−. 4−x] n, where 0 ≤ x < 2. The family includes orthosilicate SiO4− 4 (x = 0), metasilicate SiO2− 3 (x = 1), and pyrosilicate Si2O6− 7 (x = 0.5, n = 2). The name is also used for any salt of such ...
The perovskite structure is adopted at high pressure by bridgmanite, a silicate with the chemical formula (Mg,Fe)SiO 3, which is the most common mineral in the Earth's mantle. As pressure increases, the SiO 4 4− tetrahedral units in the dominant silica-bearing minerals become unstable compared with SiO 6 8− octahedral units.
Silicon is a chemical element; it has symbol Si and atomic number 14. It is a hard, brittle crystalline solid with a blue-grey metallic luster, and is a tetravalent metalloid and semiconductor. It is a member of group 14 in the periodic table: carbon is above it; and germanium, tin, lead, and flerovium are below it. It is relatively unreactive.
Category. : Tectosilicates. Tectosilicates are framework silicates which have a three-dimensional framework of silicate tetrahedra with an Si:O ratio of 1:2. This is the largest mineral group comprising nearly 75% of the crust of the Earth. Wikimedia Commons has media related to Tectosilicates.
Zeolite is a family of several microporous, crystalline aluminosilicate materials commonly used as commercial adsorbents and catalysts. [ 1 ] They mainly consist of silicon, aluminium, oxygen, and have the general formula Mn+1/n(AlO2)−(SiO2)x ･y H2O where Mn+1/n is either a metal ion or H +.
Orthosilicate salts, like sodium orthosilicate, are stable, and occur widely in nature as silicate minerals, being the defining feature of the nesosilicates. [2] Olivine, a magnesium or iron(II) orthosilicate, is the most abundant mineral in the upper mantle.