Calcioferrite

Formula:  Ca4Fe(Fe,Al)4(PO4)6(OH)4 . 13H2O

Origin of name:  From composition

 

Crystal system:  Monoclinic

Crystal class:  2/m

Twinning:

Unit cell:

 

Colour:  Yellowish white to yellow, greenish to yellowish green

Diaphaneity:  Opaque

Luster:  Pearly

Habit:  Foliated reniform or nodular masses

Hardness:  2.5

Specific gravity:  2.53

Cleavage:  1; Parallel to foliation perfect

Tenacity:

Streak:

 

Synonyms/varieties:

 

Comments:

 

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