wollastonite - Definition. Was ist wollastonite
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Was (wer) ist wollastonite - definition

SINGLE CHAIN INOSILICATE MINERAL; POLYTYPES: 1A, 3A, 4A, 5A, 7A, 1T
Calcium metasilicate; CaSiO3; Grammite
  • Wollastonite output in 2005
  • Tetrahedra arrangement within the chains in pyroxenes compared to wollastonite
  • Wollastonite [[skarn]] with [[diopside]] (green), [[andradite]] [[garnet]] (red) and [[vesuvianite]] (dark brown) from the Stanisław mine near [[Szklarska Poręba]], Izerskie Mountains, [[Lower Silesia]], [[Poland]].
  • White acicular crystals of wollastonite (field of view 8 mm) from the Central Bohemia Region, Czech Republic
  • Unit cell of triclinic wollastonite-1A

wollastonite         
['w?l?st?n??t]
¦ noun a white or greyish mineral consisting of calcium silicate, used as a source of rock wool.
Origin
C19: named after the English chemist William Hyde Wollaston + -ite1.
Wollastonite         
·noun A silicate of lime of a white to gray, red, or yellow color, occurring generally in cleavable masses, rarely in tabular crystals; tabular spar.

Wikipedia

Wollastonite

Wollastonite is a calcium inosilicate mineral (CaSiO3) that may contain small amounts of iron, magnesium, and manganese substituting for calcium. It is usually white. It forms when impure limestone or dolomite is subjected to high temperature and pressure, which sometimes occurs in the presence of silica-bearing fluids as in skarns or in contact with metamorphic rocks. Associated minerals include garnets, vesuvianite, diopside, tremolite, epidote, plagioclase feldspar, pyroxene and calcite. It is named after the English chemist and mineralogist William Hyde Wollaston (1766–1828).

Despite its chemical similarity to the compositional spectrum of the pyroxene group of minerals—where magnesium (Mg) and iron (Fe) substitution for calcium ends with diopside and hedenbergite respectively—it is structurally very different, with a third SiO4−4 tetrahedron in the linked chain (as opposed to two in the pyroxenes).