Landesite

Formula:  (Mn,Mg)9Fe3(PO4)8(OH)3 . 9H2O

Origin of name:  For K. Landes, American geologist

 

Crystal system:  Orthorhombic

Crystal class:  2/m 2/m 2/m

Twinning: 

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Colour:  Brown

Diaphaneity: 

Luster: 

Habit:  Crystals octahedral-like pseudomorphs of reddingite

Hardness:  3 to 3.5

Specific gravity:  3.03

Cleavage:  1; {010} distinct

Tenacity: 

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