Euchroite is a hydrated

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

hydroxide Hydroxide is a diatomic anion with chemical formula OH−. It consists of an oxygen and hydrogen atom held together by a single covalent bond, and carries a negative electric charge. It is an important but usually minor constituent of water. I ...

mineral with formula: Cu₂AsO₄OH·3H₂O. It is a vitreous green to emerald green mineral crystallizing in the

orthorhombic In crystallography, the orthorhombic crystal system is one of the 7 crystal systems. Orthorhombic lattices result from stretching a cubic lattice along two of its orthogonal pairs by two different factors, resulting in a rectangular prism with a r ...

system. 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 th ...

of 3.5 - 4.0 and a

specific gravity Relative density, or specific gravity, is the ratio of the density (mass of a unit volume) of a substance to the density of a given reference material. Specific gravity for liquids is nearly always measured with respect to water (molecule), wa ...

of 3.39 - 3.45. It was first described in 1823 in

Ľubietová Ľubietová (german: Libethen) is a village in central Slovakia. Originally an ancient mining town, it is known for precious minerals. Geography Ľubietová is part of the Banská Bystrica District in the Banská Bystrica Region. It is situated 25 ...

Slovakia Slovakia (; sk, Slovensko ), officially the Slovak Republic ( sk, Slovenská republika, links=no ), is a landlocked country in Central Europe. It is bordered by Poland to the north, Ukraine to the east, Hungary to the south, Austria to the s ...

References

External links

Mindat localitiesWebmineral
Copper(II) minerals Arsenate minerals Orthorhombic minerals Minerals in space group 19 {{mineral-stub