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Mineral speciesFormula
 AugeliteAl2PO4(OH)3 
Mineralogy
Family: Pseudomalachite Group, Brazilianite - Viitaniemiite series 
Space group: Monoclinic - Prismatic HM symbol (2/m) Space Group: C 2/m 
Dana class: 41.6.8.1VII - 41 Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen ; 41.6 Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen where(?)2 (XO4) Zq ; 41.6.8 
Geological context
Geological context: Hydrogen metamorphism of phosphate bearing rocks. Some high temperature hydrothermal veins. 
Thermodynamics
Individual properties
Molar weight: 199.956 g/mol  ΔGºf-2,765,210 J/mol ref.   
   
Reaction properties
Chemical reaction:  Augelite + 5H+ = 2Al+3 + H2PO4- + 3H2O 
log10(Keq) = A + B.T + C.T-1 + D.log10(T) + E.T−2 (with T expressed in Kelvin)
A B C D E
 1.02769052e+1   0.00000000e+0   0.00000000e+0   0.00000000e+0   0.00000000e+0 
Van t'Hoff
@ 25°C, 1 bar: log 10(Keq)10.28
T (ºC) : 0 25 60 100 150 200 250 300
log 10(Keq):  10.28   10.28   10.28   10.28   10.28   10.28   10.28   10.28 

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