Corkite

Formula:  PbFe3(PO4)(SO4)(OH)6

 

Origin of name:  Locality; County of Cork, Ireland

 

Crystal system:  Hexagonal

Crystal class:  3m

Twinning:

Unit cell:

 

Colour:  Dark green, yellowish green to pale yellow

Diaphaneity:

Luster:  Vitreous to resinous

Habit:  Crystals rhombohedral, often pseudo-cubic; fine-grained aggregates

Hardness:  3.5 to 4.5

Specific gravity:  4.29

Cleavage:  1; {0001} perfect

Tenacity:

Streak:

 

Synonyms/varieties:

 

Comments:

 

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