Argutite(beta)

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 -504320 -557335 58.430 52.09
Reaction properties

Argutite(beta) + 2H2O ⇌ Ge(OH)4

298.15 K, 1 bar log10K: -1.97 ΔH°r: 11756 J·mol-1
T(°C) 0 25 60 100 150 200 250 300
log10K -2.16 -1.97 -1.75 -1.54 -1.30 -1.11 -0.94 -0.81