Euchroite from Slovakia

Euchroite is a hydrated copper arsenate hydroxide mineral with formula: Cu₂AsO₄OH·3H₂O. It is a vitreous green to emerald green mineral crystallizing in the orthorhombic system. It has a Mohs hardness of 3.5 - 4.0 and a specific gravity of 3.39 - 3.45. It was first described in 1823 from Libethen, Slovakia. Image File history File links locality: Slovakia: Ľubietová, Veporské vrchy sk: Slovensky: euchroit Cu2[OH I AsO4].3H2O Source: http://www. ... Image File history File links locality: Slovakia: Ľubietová, Veporské vrchy sk: Slovensky: euchroit Cu2[OH I AsO4].3H2O Source: http://www. ... General Name, Symbol, Number copper, Cu, 29 Chemical series transition metals Group, Period, Block 11, 4, d Appearance copper, metallic Atomic mass 63. ... The arsenate ion is AsO43-. An arsenate (compound) is some compound that contains this ion. ... Hydroxide is a polyatomic ion consisting of oxygen and hydrogen: −O−H It has a charge of −1. ... In crystallography, the orthorhombic crystal system is one of the 7 lattice point groups. ... Mohs scale of mineral hardness characterizes the scratch resistance of various minerals through the ability of a harder material to scratch a softer. ... Relative density (also known as specific gravity) is a measure of the density of a material. ...

External links

• Mindat localities
• Webmineral