Truscottite

Formula : Ca7Si12O29(OH)4:H2O

Space group: 
Trigonal Space Group: p3 or p3
Dana class: 
73.2.2a.2VIII- 73 Phyllosilicates Phyllosilicate Condensed Tetrahedral Sheets ; 73.2 Phyllosilicates Phyllosilicate Condensed Tetrahedral Sheets with double and single layers ; 73.2.2a Reyerite group (Reyerite Subgroup)

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
1167.600 478.730 (Ref.: 95ant/bid) Anthony J.W., Bideaux R.A., Bladh K.W. and Nichols M.C., 1995. Handbook of Mineralogy, Volume II. Silica, Silicates. Mineral Data Publishing, Tucson, 904 pp., 2 vols. -15820398 (Ref.: 10abla/bou) Blanc, Ph.; Bourbon, X.; Lassin, A.; Gaucher, E.C. 2010 - Chemical model for cement-based materials: Temperature dependence of thermodynamic functions for nanocrystalline and crystalline C-S-H phases. Cement and Concrete Research, 40, p. 851-867 -16854619 (Ref.: 10abla/bou) Blanc, Ph.; Bourbon, X.; Lassin, A.; Gaucher, E.C. 2010 - Chemical model for cement-based materials: Temperature dependence of thermodynamic functions for nanocrystalline and crystalline C-S-H phases. Cement and Concrete Research, 40, p. 851-867 927.678 (Ref.: Internal calculation) 1034.10 (Ref.: 10abla/bou) Blanc, Ph.; Bourbon, X.; Lassin, A.; Gaucher, E.C. 2010 - Chemical model for cement-based materials: Temperature dependence of thermodynamic functions for nanocrystalline and crystalline C-S-H phases. Cement and Concrete Research, 40, p. 851-867
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.
1034.10 0.00 0.00 (Ref.: 10abla/bou) Blanc, Ph.; Bourbon, X.; Lassin, A.; Gaucher, E.C. 2010 - Chemical model for cement-based materials: Temperature dependence of thermodynamic functions for nanocrystalline and crystalline C-S-H phases. Cement and Concrete Research, 40, p. 851-867
Reaction properties

Truscottite + 14H+ + 14H2O ⇌ 7Ca+2 + 12H4SiO4

298.15 K, 1 bar log10K: 77.13 ΔH°r:-451092 J·mol-1 (Ref.: 10abla/bou) Blanc, Ph.; Bourbon, X.; Lassin, A.; Gaucher, E.C. 2010 - Chemical model for cement-based materials: Temperature dependence of thermodynamic functions for nanocrystalline and crystalline C-S-H phases. Cement and Concrete Research, 40, p. 851-867
T(°C) 0 25 60 100 150 200 250 300
log10K 83.90 77.13 68.52 60.39 52.35 45.96 40.58 35.61
log10K(T) = A + B·T + C·T-1 + D·log10(T) + E·T−2 (T in Kelvin)
A B C D E
-6049.978899 -0.779694 394923.022586 2145.349624 -24314792.937242