Kempite

Formula:  Mn2Cl(OH)3

Origin of name:  For James Kemp, American geologist

 

Crystal system:  Orthorhombic

Crystal class:  2/m 2/m 2/m

Twinning: 

Unit cell: 

 

Colour:  Emerald-green

Diaphaneity: 

Luster: 

Habit:  Crystals prismatic, elongated on c-axis, minute

Hardness:  ~ 3.5

Specific gravity:  ~ 2.94

Cleavage:  None

Tenacity: 

Streak: 

 

Synonyms/varieties:

 

Comments: 

 

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