Osarizawaite

{{Short description|Sulfate mineral}}

{{Infobox mineral

| name = Osarizawaite

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| image = Osarizawaite Hydrous Lead Copper sulfate Silver Hill Mine Pima County Arizona 1946.jpg

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| caption = Osarizawaite from Arizona

| category = Sulfate minerals, alunite group

| formula = PbCuAl₂(SO₄)₂(OH)₆

| IMAsymbol = Orz{{Cite journal|last=Warr|first=L.N.|date=2021|title=IMA–CNMNC approved mineral symbols|url=https://www.cambridge.org/core/journals/mineralogical-magazine/article/imacnmnc-approved-mineral-symbols/62311F45ED37831D78603C6E6B25EE0A|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}}

| molweight =

| strunz = 7.BC.10

| dana =

| system = Trigonal

| class = Hexagonal scalenohedral ({{Overline|3}}m)
H-M symbol: ({{Overline|3}} 2/m)

| symmetry = R{{Overline|3}}m

| unit cell = a = 7.05, c = 17.24(1) [Å], Z = 3

| color = Greenish yellow

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| tenacity = Brittle

| mohs = 3 - 4

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| gravity = 3.89 - 4.037

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| opticalprop = Uniaxial (+)

| refractive = n_ω = 1.712() n_ε = 1.732(2)

| birefringence = δ = 0.020

| pleochroism = Visible

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| references = [http://www.mindat.org/min-3033.html Mindat.org][http://www.webmineral.com/data/Osarizawaite.shtml Webmineral.com][http://www.handbookofmineralogy.com/pdfs/osarizawaite.pdf Handbook of Mineralogy]

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Osarizawaite is a greenish yellow sulfate mineral with the chemical formula: PbCuAl₂(SO₄)₂(OH)₆. It has rhombohedral crystals.Fleischer, Michael & Mandarino, Joseph, "Glossary of Mineral Species", The Mineralogical Record, 1991

It was first described in 1961 for an occurrence in the oxidized zone of the Osarizawa mine, Akita Prefecture, Honshu Island, Japan.