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Silicate minerals are rock-forming minerals made up of silicate groups. They are the largest and most important class of minerals and make up approximately 90 percent of Earth's crust. [1] [2] [3] In mineralogy, silica (silicon dioxide, SiO 2) is usually considered a silicate mineral rather than an oxide mineral. Silica is found in nature as ...
The grouping of the New Dana Classification and of the mindat.org is similar only, and so this classification is an overview only. Consistency is missing too on the group name endings (group, subgroup, series) between New Dana Classification and mindat.org. Category, class and supergroup name endings are used as layout tools in the list as well.
The largest group of minerals by far are the silicates, which are composed largely of silicon and oxygen, with the addition of ions such as aluminium, magnesium, iron and calcium. Some important rock-forming silicates include the feldspars , quartz , olivines , pyroxenes , amphiboles , garnets and micas .
Classification of non-silicate minerals – List of IMA recognized minerals and groupings; Classification of silicate minerals – List of IMA recognized minerals and groupings; Classification of organic minerals – List of IMA recognized minerals and groupings; Industrial mineral – Geological materials mined for commercial value in industry
Evaporite – Water-soluble mineral deposit formed by evaporation from an aqueous solution; Flint – Cryptocrystalline form of the mineral quartz; Geyserite – Form of opaline silica often found around hot springs and geysers; Greywacke – Sandstone with angular grains in a clay-fine matrix; Gritstone – Hard, coarse-grained, siliceous ...
Chalcedony (/ k æ l ˈ s ɛ d ə n i / kal-SED-ə-nee or / ˈ k æ l s ə ˌ d oʊ n i / KAL-sə-doh-nee) [2] is a cryptocrystalline form of silica, composed of very fine intergrowths of quartz and moganite. [3] These are both silica minerals, but they differ in that quartz has a trigonal crystal structure, while moganite is monoclinic.
Some names are not names of minerals anymore, but names of a group of minerals: Micas, biotite group. [54] [nb 1] [55] The IMA/CNMMN, Subcommittee on Nomenclature of the Micas (1998, 1999) has recommended that the name biotite be used for a series including phlogopite, siderophyllite, annite and eastonite. [56]
Sericite is the name given to very fine, ragged grains ... are a group of silicate minerals whose outstanding physical characteristic is that individual mica crystals ...
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