Atlasovite

Formula:  Cu₆FeBiO₄(SO₄)₅ ^. KCl

Origin of name:  For Vladimir Atlasov, Russian explorer

Crystal system:  Tetragonal

Crystal class:  4/m 2/m 2/m

Twinning:

Unit cell:

Colour:  Dark brown

Diaphaneity: Transparent

Luster:  Vitreous

Habit:  Tabular crystals

Hardness:  2 to 2.5

Specific gravity:  4.20

Cleavage:  1; {001} prefect

Tenacity:

Streak:  Light brown

Synonyms/varieties:

Comments:  Series with nabokoite