Zenzénite

Formula: Pb₃Fe₄Mn₃O₁₅

Origin of name: for Nils Zenzen, (1883-1959), formerly Senior curator of the Swedish museum of Natural History, Stockholm, Sweden.

Crystal system: Hexagonal

Crystal class: 6/m 2/m 2/m

Twinning:

Unit cell: a = 10.008, c = 13.672

Colour: Black

Diaphaneity: Opaque

Luster: Metallic

Habit: Tabular subhedral to anhedral grains to 150µm long

Hardness: 5.7

Specific gravity: 6.83

Cleavage: 1; {0001} indistinct to distinct

Tenacity:

Streak:

Synonyms/varieties:

Comments: Weakly magnetic