Argutite(alpha)

Formula : GeO2

Family: 
Space group: 
Tetragonal - Ditetragonal Dipyramidal H-M Symbol (4/m 2/m 2/m) Space Group: P 4/mnm
Dana class: 
4.4.1.7 (4) Simple Oxides (4.4) with a cation charge of 4+ (A++++ O2) (4.4.1)Rutile group (Tetragonal: P4/mnm)
High temperature: 
High temperature mineral.
Geological context: 
In a zinc deposit formed in metamorphosed lower Paleozoic sediments.

Dernière mise à jour le 11.06.2018

THERMODYNAMICS

Individual properties (298.15 K)
M
g·mol-1
cm3·mol-1
ΔGºf
J·mol-1
ΔHºf
J·mol-1
J·mol-1·k-1
CP
J·mol-1·K-1
104.609 17.420 -521724 -580321 39.706 50.16
Reaction properties

Argutite(alpha) + 2H2O ⇌ Ge(OH)4

298.15 K, 1 bar log10K: -5.02 ΔH°r: 34742 J·mol-1
T(°C) 0 25 60 100 150 200 250 300
log10K -5.58 -5.02 -4.38 -3.78 -3.16 -2.67 -2.26 -1.94