Hopeite(alpha)

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
458.174 146.827 (Ref.: 63wyc) Wyckoff, R.W.G., 1963, Crystal Structures, Second edition, tome 4, Interscience Publishers, New York, p. 320-322. -3642740 (Ref.: 73bnri,76smi/mar) -4102000 (Ref.: 84vie/tar, after 78yag) 420.598 (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(alpha) + 4H+ ⇌ 2H2PO4- + 3Zn+2 + 4H2O

298.15 K, 1 bar log10K: 3.82 ΔH°r:-106676 J·mol-1 (Ref.: 84vie/tar, after 78yag)
T(°C) 0 25 60 100 150 200 250 300
log10K 5.57 3.82 1.93 0.35 -1.08 -2.20 -3.26 -4.56
log10K(T) = A + B·T + C·T-1 + D·log10(T) + E·T−2 (T in Kelvin)
A B C D E
-2306.536183 -0.338592 128213.013563 831.241593 -6717708.543049