CaCrO4(s)

Formula : CaCrO4

Family: 
Oxides
Space group: 
Tetragonal - Ditetragonal Dipyramidal HM symbol (4/m 2/m 2/m) Space Group: I 41/amd
Dana class: 
35.3.2.1VI- 35 Anhydrous Chromates ; 35.3 Anhydrous Chromates where A+ XO4 ; 34.8.1
High temperature: 
Natural phase chromatite

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
156.042 49.700 (Ref.: 90rob/cam) Roberts, Willard L., Campbell, Thomas J., and Rapp, George R.: Encyclopedia of Minerals. (Van Nostrand Reinhold Co., 2nd ed., 1990) -1294986 (Ref.: 04wan/li) Wang T. and Li Z., 2004. Some thermodynamic properties of calcium chromate. J. Chem. Eng. Data, 49, p. 1300-1302. -1399193 (Ref.: Internal calculation) 126.000 (Ref.: 03dea) Dean J.A. 2003. Lange's Handbook of chemistry, 2nd edition. Science and technology press: Beijing (in Chinese).
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

CaCrO4(s) ⇌ Ca+2 + CrO4-2

298.15 K, 1 bar log10K: -3.15 ΔH°r:-22807 J·mol-1 (Ref.: Internal calculation)
T(°C) 0 25 60 100 150 200 250 300
log10K -2.85 -3.15 -3.65 -4.26 -5.06 -5.94 -6.97 -8.30
log10K(T) = A + B·T + C·T-1 + D·log10(T) + E·T−2 (T in Kelvin)
A B C D E
-1600.383939 -0.253272 88679.287500 579.484078 -5207398.418978