CHALCOALUMITE Meaning and
Definition
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Chalcoalumite is a complex mineral compound that belongs to the mineral class of sulfates. It is characterized by its distinctive greenish-blue color and crystalline structure. The name "chalcoalumite" is derived from the Greek words "chalkos" meaning copper and "alumen" meaning alum, indicating its primary constituents.
The chemical formula for chalcoalumite is CuAl4(SO4)(OH)12·3H2O. Its crystal system is triclinic, and it typically occurs in small tabular or prismatic crystals. Chalcoalumite has a moderate hardness, ranging from 3 to 3.5 on the Mohs scale. It is translucent to transparent with a vitreous to pearly luster.
This mineral is commonly found in the oxidized zone of copper deposits, where it forms as a secondary mineral through the interaction of copper-bearing solutions with aluminous rocks. It is often associated with other copper minerals such as malachite, azurite, brochantite, and alumotantite.
Chalcoalumite has various industrial uses, including as a potential source of copper and alumina. In addition, it has attracted attention from mineral collectors due to its unique color and crystal habit. Chalcoalumite specimens are sought-after for their aesthetic value and rarity.
Overall, chalcoalumite is a striking mineral known for its distinct greenish-blue color and can be recognized by its complex crystal structure and association with copper-bearing deposits.
Etymology of CHALCOALUMITE
The word "chalcoalumite" has a relatively straightforward etymology. It is derived from combining the Greek word "chalcos" meaning "copper", and the Latin word "alumen" meaning "alum" (a chemical compound), with the suffix "-ite" indicating a mineral or rock. Thus, "chalcoalumite" refers to a mineral that contains copper and alum.
