chlorocalcite

{{Infobox mineral | name = Chlorocalcite | category = Halide mineral | boxwidth = | boxbgcolor = | image = | imagesize = | caption = | formula = | IMAsymbol=Ccal | strunz = 3.AA.40 | molweight = 185.54 g/mol | system = Orthorhombic | class = Dipyramidal (mmm) H-M symbol: (2/m 2/m 2/m) | symmetry = Pnma (from synthetic crystals) | unit cell = a = 7.35 Å, b = 10.44 Å, 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 = }}

Chlorocalcite is a rare potassium calcium chloride evaporite mineral with formula: KCaCl3. It is found in active volcanic fumaroles.