Clinochalcomenite is a rare mineral that belongs to the mineral class of sulfates. It is composed of a combination of copper, aluminum, nickel, and sulfur, and its chemical formula is Cu9(Al, Ni)6(SO4)2(OH)24·36H2O. The name "clinochalcomenite" is derived from its characteristic properties. "Clino" references its crystallographic structure, which belongs to the monoclinic system, while "chalcomenite" signifies its close relationship to other minerals in the chalcomenite group.
Clinochalcomenite crystals are typically prismatic or acicular, meaning they are long and slender with a needle-like shape. The crystals can form in clusters or aggregates, and their color ranges from pale blue to bright green. This mineral has a vitreous to pearly luster and a transparent to translucent appearance. It is also characterized by its perfect cleavage and a relatively low hardness on the Mohs scale.
Clinochalcomenite is found in oxidized copper-nickel deposits and forms as a secondary mineral resulting from the alteration of primary sulfide minerals. Its presence is often associated with other copper minerals such as chalcomenite, atacamite, brochantite, and malachite. Due to its scarcity and limited distribution, clinochalcomenite is primarily sought after by mineral collectors and researchers in the earth sciences field.
In summary, clinochalcomenite is a rare sulfate mineral composed of copper, aluminum, nickel, and sulfur. It typically occurs in prismatic or acicular crystals with colors ranging from pale blue to bright green.
