Fiemmeite
Fiemmeite is a rare copper oxalate hydroxide mineral with the chemical formula Cu2(C2O4)(OH)2·2H2O. It belongs to the monoclinic crystal system and is classified as a basic copper oxalate. The mineral typically exhibits a vitreous luster and is usually found in shades of green or blue. It has a relatively low hardness on the Mohs scale and a moderate density. Fiemmeite is notable for its unique chemical composition, which includes oxalate and hydroxide groups, making it a distinct species within the broader category of copper minerals.
Composition
- OOxygen44.9%
- CuCopper44.6%
- CCarbon8.4%
- HHydrogen2.1%
Overview
Fiemmeite is a rare copper oxalate hydroxide mineral with the chemical formula Cu2(C2O4)(OH)2·2H2O. It belongs to the monoclinic crystal system and is classified as a basic copper oxalate. The mineral typically exhibits a vitreous luster and is usually found in shades of green or blue. It has a relatively low hardness on the Mohs scale and a moderate density. Fiemmeite is notable for its unique chemical composition, which includes oxalate and hydroxide groups, making it a distinct species within the broader category of copper minerals.
Etymology
Fiemmeite is named after the Fiemme Valley, the region where it was first discovered. The name reflects its geographic origin and honors the locality associated with its initial identification.
How to recognize it
Fiemmeite can be identified by its green or blue color and vitreous luster. Its hardness is relatively low, though the exact Mohs value is not specified. The mineral can be distinguished from similar copper minerals by its unique chemical composition, particularly the presence of oxalate and hydroxide. A streak test and density check may also aid in identification, though these properties are not explicitly detailed in the available facts.
Trivia
Fiemmeite is a rare mineral with a unique chemical formula that includes oxalate and hydroxide groups, which is uncommon among copper minerals. It is named after the Fiemme Valley, highlighting its specific geographic origin. As a monoclinic mineral, it exhibits a crystal system that is less common than cubic or hexagonal systems, adding to its scientific interest.