Mineral Information and Data:

Kempite
Mn2+2Cl(OH)3 [CNMNC approved formula]

Named for James Furman Kemp (1859-1926), Professor of Geology, Columbia University, New York City, New York, USA.

IMA status : Valid species (Pre-IMA 1924) Grandfathered
CLASSIFICATION 
Dana
(8th edition) :
10.01.04.01  
  (10) Oxyhalides and Hydroxyhalides
  (10.01) where (A)2 (O,OH)3 Xq
  (10.01.04)
  
Nickel-Strunz
(10th edition) :
03.DA.10a
  (03) Halides
  (03.D) Oxyhalides, Hydroxyhalides and Related Double Halides
  (03.DA) With Cu, etc., without Pb
  
Crystal system: Orthorhombic System
Point group (H-M): mmm (or 2/m 2/m 2/m) — dipyramidal
  
  
  
Other Properties: H2O Soluble.

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