Atheneite

Formula:  (Pd, Hg)₃As

Origin of name:  From Greek goddess Pallas Athene, in allusion to its palladium content

Crystal system:  Hexagonal

Crystal class:  6/m 2/m 2/m

Twinning:

Unit cell: a = 6.789 Å, c = 3.483 Å

Colour:  White

Diaphaneity: Opaque

Luster:  Metallic

Habit:  Grains, crystal outlines seldom displayed

Hardness:  5.5

Specific gravity:  10.2

Cleavage:  None

Tenacity:

Streak:

Synonyms/varieties:

Comments: Found in concentrates from gold washings