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Mineral speciesFormula
 Fluorapatite(Natur)Ca5(PO4)3F 
Mineralogy
Family: Apatite - Pyromorphite Group 
Space group: Monoclinic - Domatic HM symbol (m) Space Group: P 63/m 6/ 
Dana class: 41.8.1.1VII - 41 Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen ; 41.8 Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen where(?)5 (XO4)3 Zq ; 41.8.1 
Geological context
High temperature: It is stable in a wide range of temperature. Its stability at room temperature is possible. 
Geological context: Apatite is the most abundant naturally occuring phosphate on Earth. Occurs in metamorphic rocks, sedimentary environments or precipitate from hydrothermal solutions 
Thermodynamics
Individual properties
Molar weight: 504.302 g/mol  ΔGºf-6,462,206 J/mol ref.  Sº: 387.85 J/mol/K ref. 
  ΔHºf-6,842,549 J/mol ref.  Cp: 375.91 J/mol/K ref. 
Reaction properties
Chemical reaction:  Fluorapatite(Natur) + 6H+ = 5Ca+2 + F- + 3H2PO4- 
log10(Keq) = A + B.T + C.T-1 + D.log10(T) + E.T−2 (with T expressed in Kelvin)
A B C D E
 -3.76761098e+3   -6.22277209e-1   2.07196882e+5   1.36991221e+3   -1.17754704e+7 
Van t'Hoff
@ 25°C, 1 bar: log 10(Keq)-0.91
ΔH°r-115,601 J/mol ref.
T (ºC) : 0 25 60 100 150 200 250 300
log 10(Keq):  0.79   -0.91   -3.24   -5.81   -8.97   -12.22   -15.77   -20.02 
Maier Kelley
Cp(T) = a + b*10-3T + C*105T-2 (with T expressed in Kelvin)  ref.
a:474.43 J/mol/K 
b:56.89 J/mol/K2 
c:-102.65 J.K/mol 
Mineral speciesFormula
 Fluorapatite(Pp)Ca5(PO4)3F 
Mineralogy
Family: Apatite - Pyromorphite Group 
Space group: Monoclinic - Domatic HM symbol (m) Space Group: P 63/m 6/ 
Dana class: 41.8.1.1VII - 41 Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen ; 41.8 Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen where(?)5 (XO4)3 Zq ; 41.8.1 
Geological context
High temperature: It is stable in a wide range of temperature. Its stability at room temperature is possible. 
Geological context: Apatite is the most abundant naturally occuring phosphate on Earth. Occurs in metamorphic rocks, sedimentary environments or precipitate from hydrothermal solutions 
Thermodynamics
Individual properties
Molar weight: 504.302 g/mol  ΔGºf-6,394,150 J/mol ref.   
   Cp: 375.91 J/mol/K ref. 
Reaction properties
Chemical reaction:  Fluorapatite(Pp) + 6H+ = 5Ca+2 + F- + 3H2PO4- 
log10(Keq) = A + B.T + C.T-1 + D.log10(T) + E.T−2 (with T expressed in Kelvin)
A B C D E
 1.10128075e+1   0.00000000e+0   0.00000000e+0   0.00000000e+0   0.00000000e+0 
Van t'Hoff
@ 25°C, 1 bar: log 10(Keq)11.01
T (ºC) : 0 25 60 100 150 200 250 300
log 10(Keq):  11.01   11.01   11.01   11.01   11.01   11.01   11.01   11.01 
Maier Kelley
Cp(T) = a + b*10-3T + C*105T-2 (with T expressed in Kelvin)  ref.
a:474.43 J/mol/K 
b:56.89 J/mol/K2 
c:-102.65 J.K/mol 
Mineral speciesFormula
 Fluorapatite(Synth)Ca5(PO4)3F 
Mineralogy
Family: Apatite - Pyromorphite Group 
Space group: Monoclinic - Domatic HM symbol (m) Space Group: P 63/m 6/ 
Dana class: 41.8.1.1VII - 41 Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen ; 41.8 Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen where(?)5 (XO4)3 Zq ; 41.8.1 
Geological context
High temperature: It is stable in a wide range of temperature. Its stability at room temperature is possible. 
Geological context: Apatite is the most abundant naturally occuring phosphate on Earth. Occurs in metamorphic rocks, sedimentary environments or precipitate from hydrothermal solutions 
Thermodynamics
Individual properties
Molar weight: 504.302 g/mol  ΔGºf-6,462,434 J/mol ref.   
   Cp: 375.91 J/mol/K ref. 
Reaction properties
Chemical reaction:  Fluorapatite(Synth) + 6H+ = 5Ca+2 + F- + 3H2PO4- 
log10(Keq) = A + B.T + C.T-1 + D.log10(T) + E.T−2 (with T expressed in Kelvin)
A B C D E
 -9.50000000e-1   0.00000000e+0   0.00000000e+0   0.00000000e+0   0.00000000e+0 
Van t'Hoff
@ 25°C, 1 bar: log 10(Keq)-0.95
T (ºC) : 0 25 60 100 150 200 250 300
log 10(Keq):  -0.95   -0.95   -0.95   -0.95   -0.95   -0.95   -0.95   -0.95 
Maier Kelley
Cp(T) = a + b*10-3T + C*105T-2 (with T expressed in Kelvin)  ref.
a:474.43 J/mol/K 
b:56.89 J/mol/K2 
c:-102.65 J.K/mol 

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