{{Short description|Rare zinc sulfate mineral}} {{infobox mineral | name = Changoite | category = Sulfate mineral | image = Changoite.jpg | imagesize = | alt = | caption = Yellowish crystals of changoite associated to hexagonal colorless caracolite in an aesthetic combination. | formula = Na<sub>2</sub>Zn(SO<sub>4</sub>)<sub>2</sub>·4H<sub>2</sub>O | IMAsymbol = Cgo<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 = 7.CC.50 (10 ed) <br/><small>6/C.18-25 (8 ed)</small> | dana = | system = Monoclinic | class = Prismatic (2/m) <br/><small>(same H-M symbol)</small> | symmetry = ''P2''<sub>1</sub>/a | unit cell = a = 11.08, b = 8.25, <br/>c = 5.53 [Å], β = 100.18° (approximated); Z = 2 | color = Colorless | colour = | habit = Anhedral crystals, in small veins | twinning = | cleavage = | fracture = | tenacity = | mohs = 2-3 | luster = Vitreous | streak = White | diaphaneity = Transparent | gravity = 2.50 (measured) | density = | polish = | opticalprop = Biaxal (-) | refractive = nα=1.51, nβ=1.51, nγ=1.52 (approximated) | birefringence = | pleochroism = | 2V = 83° (calculated) | dispersion = | extinction = | length fast/slow = | fluorescence = | absorption = | melt = | fusibility = | diagnostic = | solubility = | impurities = | alteration = | other = | references = <ref>[https://www.mineralienatlas.de/lexikon/index.php/MineralData?mineral=Changoite Mineralienatlas]</ref><ref name=NJ>Schlüter, J., Klaska, K.-H., and Gebhard, G., 1999. Changoite, Na<sub>2</sub>Zn(SO<sub>4</sub>)<sub>2</sub>·4H<sub>2</sub>O, the zinc analogue of blödite, a new mineral from Sierra Gorda, Antofagasta, Chile. Neues Jahrbuch für Mineralogie - Monatshefte 3(3), 97-103.</ref><ref name=HOM>{{cite web |url=http://www.handbookofmineralogy.org/pdfs/changoite.pdf |title=Chagoite- Handbook of Mineralogy |website=Handbookofmineralogy.org |accessdate=2016-03-11}}</ref><ref name=Mindat></ref> }} '''Changoite''' is a rare zinc sulfate mineral with the formula Na<sub>2</sub>Zn(SO<sub>4</sub>)<sub>2</sub>·4H<sub>2</sub>O.<ref name=Mindat>{{cite web |url=http://www.mindat.org/min-6861.html |title=Changoite: Changoite mineral information and data |website=Mindat.org |accessdate=2016-03-11}}</ref><ref name=NJ></ref> Chagoite was discovered in the San Francisco Mine near Sierra Gorda, Antofagasta, Chile.<ref name=HOM></ref> The mineral is a zinc-analogue of blödite, cobaltoblödite, manganoblödite and nickelblödite - other representatives of the blödite group.<ref name=Mindat></ref> In terms of chemistry changoite is somewhat similar to gordaite.<ref>{{cite web |url=http://www.mindat.org/min-6975.html |title=Gordaite: Gordaite mineral information and data |website=Mindat.org |accessdate=2016-03-11}}</ref> The mineral's name comes from the Chango people, a group of early inhabitants of northern Chile.<ref name=HOM></ref>
Traces of magnesium and calcium in changoite are negligible.<ref name=HOM></ref>
Minerals associating with changoite are gypsum, zinc-bearing paratacamite, and thénardite.<ref name=NJ></ref>
==References== {{reflist}}
Category:Zinc minerals Category:Sulfate minerals Category:Sodium minerals Category:Tetrahydrate minerals Category:Monoclinic minerals Category:Minerals in space group 14 Category:Minerals described in 1999 {{sulfate-mineral-stub}}