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In geology and mineralogy, a mineral group is a set of mineral species with essentially the same crystal structure and composed of chemically similar elements. [1] Silicon-oxygen double chain in the anions of amphibole minerals. For example, the amphibole group consists of 15 or more mineral species, most of them with the general unit formula A ...
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]
Amethyst crystals – a purple quartz Apophyllite crystals sitting right beside a cluster of peachy bowtie stilbite Aquamarine variety of beryl with tourmaline on orthoclase Arsenopyrite from Hidalgo del Parral, Chihuahua, Mexico Aurichalcite needles spraying out within a protected pocket lined by bladed calcite crystals Austinite from the Ojuela Mine, Mapimí, Durango, Mexico Ametrine ...
Inosilicates contain two important rock-forming mineral groups; single-chain silicates are most commonly pyroxenes, while double-chain silicates are often amphiboles. [118] Higher-order chains exist (e.g. three-member, four-member, five-member chains, etc.) but they are rare. [119] The pyroxene group consists of 21 mineral species. [120]
The classification of minerals was based on chemical composition by Dana in the fourth edition (1854, in two volumes) of his book System of Mineralogy. [ 5 ] [ 6 ] For the 20th century, this classification was completed thanks to scientific progress, particularly in the field of crystallography .
The classification of minerals is a process of determining to which of several groups minerals belong based on their chemical characteristics. Since the 1950s, this classification has been carried out by the International Mineralogical Association, which classifies minerals into the following broad classes: Classification of non-silicate minerals
The concept of mineral is distinct from rock, which is any bulk solid geologic material that is relatively homogeneous at a large enough scale. A rock may consist of one type of mineral or may be an aggregate of two or more different types of minerals, spacially segregated into distinct phases.
This is the category of minerals in general. ... Mineral groups (29 C, 15 P) Mineral supergroups (8 C) Minerals described in the 18th century (3 C)