Beudantite

Formula : PbFe3(AsO4)2(OH)5:H2O

Family: 
Arsenate
Space group: 
Trigonal - Ditrigonal pyramidal l HM Symbol (3m) Space group: R 3m

Dernière mise à jour le 25.01.2021

THERMODYNAMICS

Individual properties (298.15 K)
M
g·mol-1
 V°
cm3·mol-1
 ΔGºf
J·mol-1
 ΔHºf
J·mol-1
 Sº
J·mol-1·k-1
 CP
J·mol-1·K-1
755.631 -3055600 (Ref.: 04gab/vie) Gaboreau S. and Vieillard Ph. (2004). Prediction of Gibbs free energies of formation of minerals of the alunite supergroup. Geochimica and Cosmochimica Acta, 68, 3307-3316
CP(T) = a + b·T + ·c·T-2 (T in Kelvin)
a
J·mol-1·K-1
 b * 103
J·mol-1·K-2
 c * 10-5
J·K·mol-1
 Maier Kelley Ref.
Reaction properties

Beudantite + 9H+ ⇌ 2H2AsO4- + 3Fe+3 + Pb+2 + 6H2O

298.15 K, 1 bar log10K: -9.34 ΔH°r: J·mol-1 (Ref.: )
T(°C) 0 25 60 100 150 200 250 300
log10K -9.34 -9.34 -9.34 -9.34 -9.34 -9.34 -9.34 -9.34
log10K(T) = A + B·T + C·T-1 + D·log10(T) + E·T−2 (T in Kelvin)
A B C D E
-9.341593 0.000000 0.000000 0.000000 0.000000