Phosphofibrite

Formula: KCuFe15(PO4)12(OH)12.12H2O

Origin of name: combination of composition phosphate and fibrous

 

Crystal system: orthorhombic

Crystal class: 2/m /2m 2/m

Twinning: 

Unit cell: 

 

Colour: yellow to yellow-green

Diaphaneity: 

Luster: vitreous

Habit: crystals fibrous, to 0.5 mm, in radial aggregates

Hardness: 4

Specific gravity: 2.90

Cleavage: 1; perfect, along a pinacoid

Tenacity: 

Streak: 

 

Synonyms/varieties:

 

Comments: 

 

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