tyrolite

{{Infobox mineral

| name = Tyrolite

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| image = Tyrolite-256893.jpg

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| category = Arsenate and carbonate minerals

| formula = {{chem2|CaCu5(AsO4)2CO3(OH)4*6H2O}}

| IMAsymbol = Tyl{{cite journal |last=Warr|first=L. N. |year=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}}

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| strunz = 8.DM.10

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| system = Orthorhombic

| class = Prismatic (2/m)
(same H-M symbol)

| symmetry = P2/c (no. 13) or C2/c (no. 15)

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| color = Blue to green

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| habit = Radial or botryoidal

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| mohs = 1.5–2.0

| luster = Vitreous

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| diaphaneity = Translucent

| gravity = 3.1–3.2

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| refractive = nα = 1.694
nβ = 1.726
nγ = 1.730

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| references = {{cite journal |last1=Krivovichev|first1=S. V. |title=Crystal chemistry and polytypism of tyrolite |journal=American Mineralogist |date=1 August 2006 |volume=91 |issue=8–9 |pages=1378–1384 |doi=10.2138/am.2006.2040 |bibcode=2006AmMin..91.1378K |s2cid=96895661}}

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Tyrolite is a hydrous calcium copper arsenate carbonate mineral with the formula CaCu₅(AsO₄)₂CO₃(OH)₄⋅6H₂O. Tyrolite forms glassy, blue to green orthorhombic radial crystals and botryoidal masses. It has a Mohs hardness of 1.5–2.0 and a specific gravity of 3.1–3.2. It is translucent with refractive indices of nα = 1.694, nβ = 1.726, and nγ = 1.730.

It is a secondary mineral formed by the weathering of associated copper and arsenic minerals. It was first described in 1845 for an occurrence in Schwaz, Tyrol, Austria.

File:Chrysocolla-Tyrolite-Clinotyrolite-202108.jpg on tyrolite and clinotyrolite specimen ({{cvt|4.0|×|2.6|×|2.6|cm|in}}); from San Simon Mine in Santa Rosa-Huantajaya District, Iquique Province, Chile.
{{small|(Click image for details of the mineral chemistry.)}}]]