Mineral group in the context of "Serpentine group"

⭐ In the context of the Serpentine group, the characteristic composition of these minerals primarily involves which two elements?

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⭐ Core Definition: Mineral group

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.

For example, the amphibole group consists of 15 or more mineral species, most of them with the general unit formula A
xB
yC
14-3x-2ySi
8O
22(OH)
2, where A is a trivalent cation such as Fe
 or Al
, B is a divalent cation such as Fe
, Ca
, or Mg
, and C is an alkali metal cation such as Li
, Na
, or K
. In all these minerals, the anions consist mainly of groups of four SiO
4 tetrahedra connected by shared oxygen corners so as to form a double chain of fused six-member rings. In some of the species, aluminum Al
 may replace some silicon atoms Si
 in the backbone, with extra B or C cations to balance the charges.

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👉 Mineral group in the context of Serpentine group

Serpentine subgroup (part of the kaolinite-serpentine group in the category of phyllosilicates) are greenish, brownish, or spotted minerals commonly found in serpentinite. They are used as a source of magnesium and asbestos, and as decorative stone. The name comes from the greenish color and smooth or scaly appearance from the Latin serpentinus, meaning "snake-like".

Serpentine subgroup is a set of common rock-forming hydrous magnesium iron phyllosilicate ((Mg,Fe)
3Si
2O
5(OH)
4) minerals, resulting from the metamorphism of the minerals that are contained in mafic to ultramafic rocks. They may contain minor amounts of other elements including chromium, manganese, cobalt or nickel. In mineralogy and gemology, serpentine may refer to any of the 20 varieties belonging to the serpentine subgroup. Owing to admixture, these varieties are not always easy to individualize, and distinctions are not usually made. There are three important mineral polymorphs of serpentine: antigorite, lizardite and chrysotile.

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Mineral group in the context of Quartz

Quartz is a hard mineral composed of silica (silicon dioxide). Its atoms are linked in a continuous framework of SiO4 silicon–oxygen tetrahedra, with each oxygen atom being shared between two tetrahedra, giving an overall chemical formula of SiO2. Therefore, quartz is classified structurally as a framework silicate mineral and compositionally as an oxide mineral. Quartz is the second most common mineral or mineral group in Earth's lithosphere, comprising about 12% by mass.

Quartz exists in two forms, the normal α-quartz and the high-temperature β-quartz, both of which are chiral. The transformation from α-quartz to β-quartz takes place abruptly at 573 °C (846 K; 1,063 °F). Since the transformation is accompanied by a significant change in volume, it can easily induce microfracturing of ceramics or rocks passing through this temperature threshold.

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Mineral group in the context of Tourmaline

Tourmaline (/ˈtʊərməlɪn, -ˌliːn/ TOOR-mə-lin, -⁠leen) is a crystalline silicate mineral group in which boron is compounded with elements such as aluminium, iron, magnesium, sodium, lithium, or potassium. This gemstone comes in a wide variety of colors.

The name is derived from the Sinhalese tōramalli (ටෝරමල්ලි), which refers to the carnelian gemstones.

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LINKED FROM (PARENTS)
← Quartz ← Serpentine group ← Serpentine subgroup ← Tourmaline
LINKS TO (CHILDREN)
Geology → Mineralogy → Mineral species → Amphibole → Trivalent → Cation → Alkali metal → Oxygen → Aluminum → Silicon →