Clinomimetite

Formula:  Pb₅(AsO₄)₃Cl

Origin of name:  From monoclinic and mimetite

Crystal system:  Monoclinic

Crystal class:  2/m

Twinning:

Unit cell:

Colour:  Greenish yellow

Diaphaneity:

Luster:

Habit:  Barrel-shaped or short prismatic crystals

Hardness:  4

Specific gravity:  7.36

Cleavage:  None

Tenacity:

Streak:

Synonyms/varieties:

Comments:  At 98-120°C mimetite  makes reversible phase transition to monoclinic dimorph