Valentinite

Formula : Sb2O3

Family: 
Oxides
Space group: 
Orthorhombic - Dipyramidal HM symbol (2/m 2/m 2/m) Space Group: Pccn
Dana class: 
4.3.11.1III - 4 Oxide Minerals ; 4.3 Simple Oxides with a cation charge of 3+ (A+++2 O3) ; 4.3.11

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
291.518 50.010 (Ref.: 03zot/shi) Zotov A. V., Shikina N. D. and Akinfiev N. N., 2003. Thermodynamic properties of the Sb(III) hydroxide complex Sb(OH)3(aq) at hydrothermal conditions. Geochimica et Cosmochimica Acta, Volume 67, 1821-1836 -625926 (Ref.: 03zot/shi) Zotov A. V., Shikina N. D. and Akinfiev N. N., 2003. Thermodynamic properties of the Sb(III) hydroxide complex Sb(OH)3(aq) at hydrothermal conditions. Geochimica et Cosmochimica Acta, Volume 67, 1821-1836 -708106 (Ref.: Internal calculation) 123.135 (Ref.: 03zot/shi) Zotov A. V., Shikina N. D. and Akinfiev N. N., 2003. Thermodynamic properties of the Sb(III) hydroxide complex Sb(OH)3(aq) at hydrothermal conditions. Geochimica et Cosmochimica Acta, Volume 67, 1821-1836 131.71 (Ref.: 03zot/shi) Zotov A. V., Shikina N. D. and Akinfiev N. N., 2003. Thermodynamic properties of the Sb(III) hydroxide complex Sb(OH)3(aq) at hydrothermal conditions. Geochimica et Cosmochimica Acta, Volume 67, 1821-1836
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.
103.94 42.68 13.38 (Ref.: 03zot/shi) Zotov A. V., Shikina N. D. and Akinfiev N. N., 2003. Thermodynamic properties of the Sb(III) hydroxide complex Sb(OH)3(aq) at hydrothermal conditions. Geochimica et Cosmochimica Acta, Volume 67, 1821-1836
Reaction properties

Valentinite + 3H2O ⇌ 2Sb(OH)3

298.15 K, 1 bar log10K: -8.52 ΔH°r:57242 J·mol-1 (Ref.: Internal calculation)
T(°C) 0 25 60 100 150 200 250 300
log10K -9.38 -8.52 -7.41 -6.34 -5.24 -4.36 -3.64 -3.05
log10K(T) = A + B·T + C·T-1 + D·log10(T) + E·T−2 (T in Kelvin)
A B C D E
186.305822 0.017324 -17580.045364 -62.458160 1202339.797644