Mineral Information and Data:

Sinkankasite
Mn2+Al(PO3OH)2(OH) • 6H2O [CNMNC approved formula]

Named for John Sinkankas (1915-2002), Captain, U.S. Navy, and author of books on minerals and gems.

IMA status : Approved Species 1984 ()
CLASSIFICATION 
Dana
(8th edition) :
42.07.01.04  
  (42) Hydrated Phosphates Containing Hydroxyl or Halogen
  (42.07) where (AB)5 (XO4)3 Zq · x(H2O)
  (42.07.01) Childrenite Group
  
Nickel-Strunz
(10th edition) :
08.DB.20
  (08) Phosphates, Arsenates, Vanadates
  (08.D) Phosphates, etc
  (08.DB) With only medium-sized cations, (OH, etc.):RO4< 1:1
  
Crystal system: Triclinic System
Point group (H-M): 1 — pinacoidal
  
  
  

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