Junoite

Formula:  Pb₃Cu₂Bi₈(S,Se)₁₆

Origin of name:  After locality; Juno mine, Tennant Creek, Northern Territory, Australia

Crystal system:  Monoclinic

Crystal class:  2/m

Twinning: 

Unit cell: a = 26.66, b = 4.06, c = 17.03, β = 127.2°

Colour:  Creamy white in polished section

Diaphaneity:  Opaque

Luster: Metallic

Habit:  Crystals tabular; irregular grains

Hardness:  3 to 4

Specific gravity:  6.77

Cleavage:  1; Good

Tenacity: 

Streak: 

Synonyms/varieties:

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