Gorceixite

Formula : BaAl3(PO4)2(OH)5:H2O

Family: 
Phosphates
Space group: 
Trigonal - Hexagonal ScalenohedralH-M Symbol (3 2/m) 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
511.279 -5642650 (Ref.: 89sch/her) Schwab R. G., Herold H., Costa M. L. D., and Oliveira N. P. (1989) The formation of aluminous phosphates through lateritic weathering of rocks. Weathering 2, 369-386.
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

Gorceixite + 9H+ ⇌ 3Al+3 + Ba+2 + 2H2PO4- + 6H2O

298.15 K, 1 bar log10K: 13.71 ΔH°r: J·mol-1 (Ref.: )
T(°C) 0 25 60 100 150 200 250 300
log10K 13.71 13.71 13.71 13.71 13.71 13.71 13.71 13.71
log10K(T) = A + B·T + C·T-1 + D·log10(T) + E·T−2 (T in Kelvin)
A B C D E
13.705750 0.000000 0.000000 0.000000 0.000000