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Mineral speciesFormula
 Ag(element)Ag 
Mineralogy
Family: Metal 
Space group: Isometric - Hexoctahedral H-M Symbol (4/m 3 2/m) Space Group: F m3m 
Dana class: 1.1.1.2 (1) Native Elements (1.1) with metallic elements other than the platinum group (1.1.1) Gold group 
Geological context
High temperature: Silver is stable at room temperature but in geological environment it is difficult to give a upper limit of stability . 
Geological context: Originally, silver was mined largely as native silver from supergene enriched, high grade, vein deposits. 
Thermodynamics
Individual properties
Molar weight: 107.868 g/mol  ΔGºf0 J/mol ref.  Sº: 42.55 J/mol/K ref. 
  ΔHºf0 J/mol ref.  Cp: 25.35 J/mol/K ref. 
Reaction properties
Chemical reaction:  Ag(element) + 0.5O2 + 2H+ = Ag+2 + H2O 
log10(Keq) = A + B.T + C.T-1 + D.log10(T) + E.T−2 (with T expressed in Kelvin)
A B C D E
 -4.09159694e+2   -6.30760607e-2   2.30132428e+4   1.46272352e+2   -1.35996251e+6 
Van t'Hoff
@ 25°C, 1 bar: log 10(Keq)-4.14
ΔH°r-34,108 J/mol ref.
T (ºC) : 0 25 60 100 150 200 250 300
log 10(Keq):  -3.99   -4.14   -4.35   -4.59   -4.88   -5.16   -5.47   -5.84 
Maier Kelley
Cp(T) = a + b*10-3T + C*105T-2 (with T expressed in Kelvin)  ref.
a:22.69 J/mol/K 
b:6.92 J/mol/K2 
c:0.53 J.K/mol 

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