Guerinite

Formula : Ca5H2(AsO4)4:9H2O

Family: 
Arsenate
Space group: 
Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 21/n

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
920.220 335.847 (Ref.: 00bla/bid) Bladh K.W., Bideaux R.A., Anthony-Morton E., Nichols B.G. (2000) The Handbook of Mineralogy Volume IV, Mineralogical Society of America. -7798607 (Ref.: 99bot/bro) Bothe JV, Brown PW (1999) The stabilities of calcium arsenates at 23 C. J Hazard Mater B 69:197-207
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

Guerinite + 6H+ ⇌ 4H2AsO4- + 5Ca+2 + 9H2O

298.15 K, 1 bar log10K: 19.69 ΔH°r: J·mol-1 (Ref.: )
T(°C) 0 25 60 100 150 200 250 300
log10K 19.69 19.69 19.69 19.69 19.69 19.69 19.69 19.69
log10K(T) = A + B·T + C·T-1 + D·log10(T) + E·T−2 (T in Kelvin)
A B C D E
19.689145 0.000000 0.000000 0.000000 0.000000