Mineral Information and Data:

Picropharmacolite
Ca4Mg(AsO3OH)2(AsO4)2 • 11H2O [CNMNC approved formula]

Named for its magnesia content and the similarity to pharmacolite.

IMA status : Valid species (Pre-IMA 1819) Grandfathered
CLASSIFICATION 
Dana
(8th edition) :
39.02.04.01  
  (39) Hydrated Acid Phosphates
  (39.02) H2 (AB)5 (XO4)4 · x(H2O)
  (39.02.04)
  
Nickel-Strunz
(10th edition) :
08.CH.15
  (08) Phosphates, Arsenates, Vanadates
  (08.C) Phosphates without Additional Anions, with H2O
  (08.CH) With large and medium-sized cations, RO4:H2O < 1:1
  
Crystal system: Triclinic System
Point group (H-M): 1 — pinacoidal
  
  
  

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