Cafetite

Formula:  Ca(Fe,Al)2Ti4O12 . 4H2O

Origin of name:  Combination of symbols of elements

 

Crystal system:  Orthorhombic

Crystal class:  2/m 2/m 2/m

Twinning:

Unit cell:

 

Colour:  Pale yellow to colourless

Diaphaneity:

Luster:  Adamantine

Habit:  Crystals columnar to acicular; fibrous aggregates or radial-fibrous aggregates

Hardness:  4 to 5

Specific gravity:  3.28

Cleavage:  2; prismatic

Tenacity:

Streak:

 

Synonyms/varieties:

 

Comments:

 

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