Mawbyite

Formula:  Pb2 (Fe, Zn)4 (AsO4)4 (OH)3 . H2O

Origin of name:  For Sir Maurice Mawby, Australian mineral collector

 

Crystal system:  Monoclinic

Crystal class:  2/m

Twinning: 

Unit cell: 

 

Colour:  Orange brown to reddish brown

Diaphaneity:  Transparent to translucent

Luster:  Adamantine

Habit:  Dogtooth to prismatic crystals or tabular, to 0.2 mm long

Hardness:  4

Specific gravity

Cleavage:  1; {001} prominent

Tenacity: 

Streak:  Orange-yellow

 

Synonyms/varieties:

 

Comments:  Fe analogue of tsumcorite

 

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