Cafarsite

Formula:  Ca₈(Ti,Fe,Fe,Mn)_6-7(AsO₃)₁₂ ^. 4H₂O

Origin of name:  Combination of symbols of elements

Crystal system:  Cubic

Crystal class:  2/m -3

Twinning:

Unit cell: a = 16.01 Ǻ

Colour:  Dark brown

Diaphaneity:

Luster:

Habit:   Crystals well formed, rough faces

Hardness:  5.5 to 6

Specific gravity:  3.90

Cleavage:  None

Tenacity:  Conchoidal

Streak:  Yellowish brown

Synonyms/varieties:

Comments: