Glaserite

Formula : Na2K6(SO4)4

Family: 
Sulfates
Space group: 
synonyme de aphtitalite Trigonal - Hexagonal ScalenohedralH-M Symbol (3 2/m) Space Group: P 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
664.824 251.830 (Ref.: 63wyc) Wyckoff, R.W.G., 1963, Crystal Structures, Second edition, tome 4, Interscience Publishers, New York, p. 320-322. -5238419 (Ref.: 80har/wea) Harvie C.E., and Weare J.H., 1980. The prediction of mineral soluhilities in natural waters: the Na K Mg Ca Cl SO4 H2O system from zero to high concentration at 25C. Geochimica et Cosmochimica Acta, 44, p. 981 997. -5709240 (Ref.: 82wag/eva) Wagman D.D., Evans W.H., Parker V.B., Schumm R.H., Halow I., Bailey S.M., Churney K.L., and Nutall R.L., 1982. The NBS Tables of Chemical Thermodynamic Properties. J. Phys. Chem. Ref. Data, 11, Suppl. 2. 680.972 (Ref.: Internal calculation)
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

Glaserite ⇌ 6K+ + 2Na+ + 4SO4-2

298.15 K, 1 bar log10K: -7.61 ΔH°r:78360 J·mol-1 (Ref.: 82wag/eva) Wagman D.D., Evans W.H., Parker V.B., Schumm R.H., Halow I., Bailey S.M., Churney K.L., and Nutall R.L., 1982. The NBS Tables of Chemical Thermodynamic Properties. J. Phys. Chem. Ref. Data, 11, Suppl. 2.
T(°C) 0 25 60 100 150 200 250 300
log10K -9.09 -7.61 -6.40 -5.71 -5.55 -6.12 -7.56 -10.39
log10K(T) = A + B·T + C·T-1 + D·log10(T) + E·T−2 (T in Kelvin)
A B C D E
-6260.641319 -0.960722 343989.606929 2270.966622 -20768608.862245