Florencite(La)

Formula : LaAl3(PO4)2(OH)6

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
511.837 -5742530 (Ref.: 93sch/got) Schwab R. G., Gotz C., Herold H., and Oliveira N. P. (1993) Compounds of the crandallite type-Thermodynamic properties of Caphosphates, Sr-phosphates, Ba-phosphates, Pb-phosphates, La-phosphates, Ce-phosphates to Gd-phosphates and Ca-arsenates, Ba-arsenates, Pb-arsenates, La-arsenates, Ce-arsenate.Srarsenates, Neues Jahrb Miner Monatsh. 12, 551-568.
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

Florencite(La) + 10H+ ⇌ 3Al+3 + La+3 + 2H2PO4- + 6H2O

298.15 K, 1 bar log10K: 18.18 ΔH°r: J·mol-1 (Ref.: )
T(°C) 0 25 60 100 150 200 250 300
log10K 18.18 18.18 18.18 18.18 18.18 18.18 18.18 18.18
log10K(T) = A + B·T + C·T-1 + D·log10(T) + E·T−2 (T in Kelvin)
A B C D E
18.175668 0.000000 0.000000 0.000000 0.000000