Hopeite(para)

Formula : Zn3(PO4)2:4H2O

Family: 
Phosphates
Space group: 
Orthorhombic - Dipyramidal HM symbol (2/m 2/m 2/m) Space Group: P nma
Dana class: 
40.3.4.1VII - 40 Hydrated Phosphates, etc ; 40.3 Hydrated Phosphates, etc where (A++)3 (XO4)2 . x(H2O) ; 40.3.4

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
458.174 146.830 (Ref.: 63wyc) Wyckoff, R.W.G., 1963, Crystal Structures, Second edition, tome 4, Interscience Publishers, New York, p. 320-322. -3606300 (Ref.: 84vie/tar) Vieillard P., Tardy Y., 1984, Thermochemical properties of phosphates, Chap. 4. In: Phosphate Minerals, J.O. Nriagu and P.B. Moore (Eds), Springer-Verlag, New York, ISBN 3-540-12757-7, 171-198 -4077750 (Ref.: 84vie/tar) Vieillard P., Tardy Y., 1984, Thermochemical properties of phosphates, Chap. 4. In: Phosphate Minerals, J.O. Nriagu and P.B. Moore (Eds), Springer-Verlag, New York, ISBN 3-540-12757-7, 171-198 379.712 (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

Hopeite(para) + 4H+ ⇌ 2H2PO4- + 3Zn+2 + 4H2O

298.15 K, 1 bar log10K: 10.21 ΔH°r:-130926 J·mol-1 (Ref.: 84vie/tar) Vieillard P., Tardy Y., 1984, Thermochemical properties of phosphates, Chap. 4. In: Phosphate Minerals, J.O. Nriagu and P.B. Moore (Eds), Springer-Verlag, New York, ISBN 3-540-12757-7, 171-198
T(°C) 0 25 60 100 150 200 250 300
log10K 12.34 10.21 7.87 5.88 4.05 2.61 1.29 -0.22
log10K(T) = A + B·T + C·T-1 + D·log10(T) + E·T−2 (T in Kelvin)
A B C D E
-2304.398355 -0.338591 129479.557876 831.240789 -6717702.392153