Dargaite

{{Short description|Barium-analogue mineral}} {{Infobox mineral | name = Dargaite | boxwidth = | boxbgcolor = | image = | imagesize = | alt = | caption = | struct image = | struct caption = | struct imagesize = | struct2 image = | struct2 caption = | struct2 imagesize= | SMILES = | Jmol = | category = | formula = BaCa₁₂(SiO₄)₄(SO₄)₂O₃ | IMAsymbol = | molweight = | strunz = | dana = | system = | class = | symmetry = | unit cell = | color = | colour = | habit = | twinning = | cleavage = | fracture = | tenacity = | toughness = | mohs = | luster = | streak = | diaphaneity = | gravity = | density = | polish = | opticalprop = | refractive = | birefringence = | pleochroism = | 2V = | dispersion = | extinction = | length fast/slow = | fluorescence = | absorption = | melt = | Curie temp = | fusibility = | diagnostic = | solubility = | impurities = | alteration = | other = | prop1 = | prop1text = | references = | var1 = | var1text = | var2 = | var2text = | var3 = | var3text = | var4 = | var4text = | var5 = | var5text = | var6 = | var6text = }} '''Dargaite''' is a rare mineral with formula BaCa₁₂(SiO₄)₄(SO₄)₂O₃. It is the barium-analogue of nabimusaite, also differing from it in the lack of fluorine. It is one of many recently approved new minerals coming from the Hatrurim complex. Dargaite, as nabimusaite, is trigonal (space group ''R''-3''m'').<ref>: Gfeller, F., Galuskina, I.O., Galuskin, E.V., Armbruster, T., Vapnik, Y., Dulski, M., Gardocki, M., Jeżak, L., and Murashko, M., 2015. Dargaite, IMA 2015-068. CNMNC Newsletter No. 28, December 2015, 1860; Mineralogical Magazine 79, 1859–1864</ref><ref>{{cite web|url=http://www.mindat.org/min-46885.htmll |title=Dargaite: Dargaite mineral information and data |website=Mindat.org |accessdate=2016-03-02}}</ref>

==References== {{reflist}}

Category:Silicate minerals Category:Sulfate minerals Category:Calcium minerals Category:Barium minerals Category:Trigonal minerals Category:Minerals in space group 166

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