Tyrolite is a hydrated

calcium Calcium is a chemical element with the symbol Ca and atomic number 20. As an alkaline earth metal, calcium is a reactive metal that forms a dark oxide-nitride layer when exposed to air. Its physical and chemical properties are most similar t ...

copper Copper is a chemical element with the symbol Cu (from la, cuprum) and atomic number 29. It is a soft, malleable, and ductile metal with very high thermal and electrical conductivity. A freshly exposed surface of pure copper has a pinkis ...

arsenate The arsenate ion is . An arsenate (compound) is any compound that contains this ion. Arsenates are salts or esters of arsenic acid. The arsenic atom in arsenate has a valency of 5 and is also known as pentavalent arsenic or As(V). Arsenate res ...

carbonate A carbonate is a salt of carbonic acid (H2CO3), characterized by the presence of the carbonate ion, a polyatomic ion with the formula . The word ''carbonate'' may also refer to a carbonate ester, an organic compound containing the carbonate ...

mineral with formula: Ca Cu₅( As O₄)₂ CO₃(O H)₄·6 H₂O. Tyrolite forms glassy blue to green orthorhombic radial crystals and botryoidal masses. It has a

Mohs hardness The Mohs scale of mineral hardness () is a qualitative ordinal scale, from 1 to 10, characterizing scratch resistance of various minerals through the ability of harder material to scratch softer material. The scale was introduced in 1812 by t ...

of 1.5 to 2 and a specific gravity of 3.1 to 3.2. It is translucent with

refractive indices In optics, the refractive index (or refraction index) of an optical medium is a dimensionless number that gives the indication of the light bending ability of that medium. The refractive index determines how much the path of light is bent, or ...

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 Schwaz () is a city in the Austrian state of Tyrol. It is the administrative center of the Schwaz district. Schwaz is located in the lower Inn valley. Location Schwaz lies in the middle of the Lower Inn Valley at the foot of the Kellerjoch a ...

Tyrol Tyrol (; historically the Tyrole; de-AT, Tirol ; it, Tirolo) is a historical region in the Alps - in Northern Italy and western Austria. The area was historically the core of the County of Tyrol, part of the Holy Roman Empire, Austrian Emp ...

Austria Austria, , bar, Östareich officially the Republic of Austria, is a country in the southern part of Central Europe, lying in the Eastern Alps. It is a federation of nine states, one of which is the capital, Vienna, the most populous ...

Chrysocolla-Tyrolite-Clinotyrolite-202108

References

WebmineralMindat with location data

Calcium minerals Copper(II) minerals Arsenate minerals Monoclinic minerals Minerals in space group 13 Minerals in space group 15 {{carbonate-mineral-stub