{{Infobox mineral | name = Chlorocalcite | category = Halide mineral | boxwidth = | boxbgcolor = | image = | imagesize = | caption = | formula = {{chem2|KCaCl3}} | IMAsymbol=Ccal<ref>{{Cite journal|last=Warr|first=L.N.|date=2021|title=IMA–CNMNC approved mineral symbols|journal=Mineralogical Magazine|volume=85|issue=3|pages=291–320|doi=10.1180/mgm.2021.43|bibcode=2021MinM...85..291W|s2cid=235729616|doi-access=free}}</ref> | strunz = 3.AA.40 | molweight = 185.54 g/mol | system = Orthorhombic | class = Dipyramidal (mmm) <br/>H-M symbol: (2/m 2/m 2/m) | symmetry = ''Pnma'' (from synthetic crystals) | unit cell = a = 7.35 Å, b = 10.44 Å, <br/>c = 7.25 Å; Z = 4 | color = White, tinged violet | habit = Prismatic or tabular cube-like crystals, pseudo cubic | twinning = | cleavage = Perfect on {001}, good on {010} and {100} | fracture = | tenacity = | mohs = 2.5-3 | luster = | refractive = ~1.52 | opticalprop = Biaxial (–) | birefringence = weak | pleochroism = | streak = | gravity = | density = 2.16 calculated | melt = | fusibility = | diagnostic = | solubility = In water | diaphaneity = Transparent to semi-transparent | other = Deliquescent | references = <ref>[https://www.mineralienatlas.de/lexikon/index.php/MineralData?mineral=Chlorocalcite Mineralienatlas]</ref><ref name=Mindat>[http://www.mindat.org/min-1020.html Chlorocalcite on Mindat.org]</ref><ref name=Webmin>[https://www.webmineral.com/data/Chlorocalcite.shtml Chlorocalcite on Webmineral]</ref><ref name=HBM>[http://rruff.geo.arizona.edu/doclib/hom/chlorocalcite.pdf Handbook of Mineralogy]</ref> }}
'''Chlorocalcite''' is a rare potassium calcium chloride evaporite mineral with formula: KCaCl<sub>3</sub>. It is found in active volcanic fumaroles.
It was first described in 1872 for an occurrence on Mount Vesuvius and given the name for its calcium content previous to discovering that it also contained potassium.<ref name=Mindat/><ref name=Webmin/> It has also been reported from the Desdemona Mine, Peine, Lower Saxony, Germany.<ref name=Mindat/>
==References== {{Reflist}}
Category:Potassium minerals Category:Calcium minerals Category:Chloride minerals Category:Orthorhombic minerals Category:Minerals in space group 62 Category:Mount Vesuvius
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