Monteneroite

monteneroite

vivianite

strashimirite

braunite

Images

Formula: Cu²⁺Mn²⁺₂(AsO₄)₂.8H₂O
Arsenate of copper and manganese, vivianite group
Crystal System: Monoclinic
Specific gravity: 2.97 measured, 2.983 calculated
Hardness: 2
Streak: White
Colour: Light green
Environments

Hydrothermal environments

Monteneroite is a new mineral, approved in 2020 and to date (January 2023) reported only from the type locality.

Localities

At the type locality, the Monte Nero mine, Rocchetta di Vara, La Spezia Province, Liguria, Italy, monteneroite is a secondary mineral that crystallised from arsenic-, copper- and manganese-rich fluids, and it is associated with braunite, copper, cuprite, rhodochrosite and strashimirite. Monteneroite occurs as light green, thick blades up to 2.5 mm long. It has a vivianite-type structure (MM 84.6.881-887).

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