Mineral Information and Data:

Whitlockite
Ca9Mg(PO3OH)(PO4)6 [CNMNC approved formula]

Named for Herbert Percy Whitlock (1868-1948), American mineralogist, Curator, American Museum of Natural History, New York City, NY, USA.

IMA status : Valid species (Pre-IMA 1941) Grandfathered
CLASSIFICATION 
Dana
(8th edition) :
38.03.04.01  
  (38) Anhydrous Phosphates, etc
  (38.03) (A+ B++)3 (XO4)2
  (38.03.04) Whitlockite group
  
Nickel-Strunz
(10th edition) :
08.AC.45
  (08) Phosphates, Arsenates, Vanadates
  (08.A) Phosphates, etc. without additional anions, without H2O
  (08.AC) With medium-sized and large cations
  
Crystal system: Trigonal System
Point group (H-M): 3m — ditrigonal-pyramidal
  
  
  
Other Properties: BioMineral.

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