Heat of formation (@298): −89.61kJ
Gibbs free energy: 41.78kJ
References
[2][3][4][5][6]
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[7] 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[8] in the linked chain (as opposed to two in the pyroxenes).
^Virta, Robert; Van Gosen, Brad (January 27, 2015). "Mineral Resource of the Month: Wollastonite". Earth Magazine. American Geosciences Institute.
^Whitley, Sean; Halama, Ralf; Gertisser, Ralf; Preece, Katie; Deegan, Frances M.; Troll, Valentin R. (2020-10-18). "Magmatic and Metasomatic Effects of Magma–Carbonate Interaction Recorded in Calc-silicate Xenoliths from Merapi Volcano (Indonesia)". Journal of Petrology. 61 (4). doi:10.1093/petrology/egaa048. ISSN 0022-3530.
^William Alexander Deer; Robert Andrew Howie; J. Zussman (1992). An introduction to the rock-forming minerals. Longman Scientific & Technical. ISBN 978-0-470-21809-9.
Wollastonite is a calcium inosilicate mineral (CaSiO3) that may contain small amounts of iron, magnesium, and manganese substituting for calcium. It is...
Mineral examples include plagioclase, microcline, rhodonite, turquoise, wollastonite and amblygonite, all in triclinic normal (1). Crystal structure Crystal...
minerals available from India are phosphorite, dolomite, gypsum, garnet, wollastonite, vermiculite, ochre, perlite, bentonite, asbestos, cadmium, felspar,...
plagioclase, and depending on the protolith, more calcite/aragonite and wollastonite. Often the easiest way to determine the true nature of an amphibolite...
Massachusetts. Enstatite, with MgSiO3 and FeSiO3 end-members Khondalite Wollastonite, CaSiO3 Warr, L. N. (2021). "IMA–CNMNC approved mineral symbols". Mineralogical...
Balkan, O.; Demirer, H. (2010). "Mechanical properties of glass bead- and wollastonite-filled isotactic-polypropylene composites modified with thermoplastic...
Sonora is the leading producer of gold, copper, graphite, molybdenum, and wollastonite. There are still deposits of silver in the Sierra Madre Occidental. Sonora...
tremolite, anthophyllite and actinolite. Short, fiber-like minerals include wollastonite and palygorskite. Biological fibers, also known as fibrous proteins or...
and is polymorphous with wollastonite. Its formula can alternatively be written as Ca3Si3O9. Other names include ß-Wollastonite, and cyclowollastonite....
low-pressure metamorphic minerals, such as spinel, andalusite, vesuvianite, or wollastonite. Similar changes may be induced in shales by the burning of coal seams...
while some calcium minerals containing little iron or magnesium, such as wollastonite or apatite, were included in the femic minerals. Cross and his coinvestigators...
these objects found that they consist either of hematite (Fe2O3) or wollastonite (CaSiO3) mixed with minor amounts of hematite and goethite (FeOOH). The...
highly abrasive fillers such as chopped or hammer-milled glass fiber and wollastonite.[citation needed] A high-pressure polyurethane dispense unit, showing...
others at low levels of addition such as dolomite, limestone, talc and wollastonite. The production of pottery includes the following stages: Preparing the...
both naturally occurring and synthetic asbestos-like fibers, such as wollastonite, attapulgite, glass wool and rock wool, are believed to have similar...
skarns, contact metamorphosed limestones with vesuvianite, diopside, wollastonite and wernerite. Grossular garnet from Kenya and Tanzania has been called...
(Ca3SiO5); 2CaO·SiO2, (Ca2SiO4); 3CaO·2SiO2, (Ca3Si2O7); and CaO·SiO2, wollastonite (CaSiO3). It has a low bulk density and high physical water absorption...
emerald, granite, and masonry stone. Reserves of barytes, fluorite, wollastonite and vermiculite have also been found.[citation needed] Nearest airports...
found in contact metamorphosed limestones with vesuvianite, diopside, wollastonite and wernerite. A highly sought after variety of gem garnet is the fine...
the yellow fluorescence of esperite, and the orange fluorescence of wollastonite and clinohedrite. Hexavalent uranium, in the form of the uranyl cation...
range of 950 to 1100 °C. The ultimate product is composed of copper-wollastonite ([Ca,Cu]3Si3O9) crystals and a "glassy phase rich in copper, sodium,...
being in the same periodic group, are chemically similar.) The mineral wollastonite was later named after Wollaston for his contributions to crystallography...
other provinces of China, Jilin has extensive deposits of Kieselguhr, wollastonite, floatstone, and molybdenum. Industry in Jilin is concentrated on automobiles...
Tilley and named for the location. At the type locality it occurs with wollastonite, spurrite, perovskite, merwinite, melilite and gehlenite. It occurs in...
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