Zemannite

zemannite

tellurite

spiroffite

moctezumite

Images

Formula: Mg0.5ZnFe3+(Te4+O3)3.nH2O (3 ≤ n ≤ 4.5)
Tellurite
Specific gravity: 4.05
Hardness: Quite soft
Streak: White
Colour: Light brown, dark brown
Environments

Hydrothermal environments

Localities

At the type locality, the Moctezuma Mine, Moctezuma, Moctezuma Municipality, Sonora, Mexico, zemannite is a rare secondary mineral in the oxidised zone of a hydrothermal gold-tellurium deposit, occurring as crystals usually less than 1 mm long. Associated minerals include tellurium, tellurite, paratellurite, spiroffite, mroseite, moctezumite, denningite and burckhardtite (CM 14.387-390, HOM, Dana).

Back to Minerals