Arsenohauchecornite

Formula:  Ni₁₈Bi₃AsS₁₆

Origin of name:  From arsenic and  chemical relationship to hauchecornite

Crystal system:  Tetragonal

Crystal class:  4/m 2/m 2/m

Twinning:

Unit cell: a = 10.271 Å, c = 10.807 Å

Colour:  Bronze

Diaphaneity: Opaque

Luster:  Metallic, brilliant on fresh surface

Habit:  Crystals tabular; irregular masses

Hardness:  5.5

Specific gravity:  6.35

Cleavage:  None

Tenacity:

Streak: Grayish black

Synonyms/varieties:

Comments:  Series with hauchecornite and with bismutohauchecornite. Formed in hydrothermal Ni-Co-Cu veins