Mineral Information and Data:

Phosphammite
(NH4)2(PO3OH) [CNMNC approved formula]

Named as a PHOSPHate of AMMonium.

IMA status : Valid species (Pre-IMA 1870) Grandfathered
CLASSIFICATION 
Dana
(8th edition) :
37.01.03.01  
  (37) Anhydrous Acid Phosphates
  (37.01) with miscellaneous formulae
  (37.01.03)
  
Nickel-Strunz
(10th edition) :
08.AD.20
  (08) Phosphates, Arsenates, Vanadates
  (08.A) Phosphates, etc. without additional anions, without H2O
  (08.AD) With only large cations
  
Crystal system: Monoclinic System
Point group (H-M): 2/m — prismatic
  
  
  

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