Boehmite

Formula : AlO(OH)

Space group: 
Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: Amam
Dana class: 
6.1.2.1 (6)Hydroxides and Oxides Containing Hydroxyl (6.1)where X+++O OH (6.1.2)Dana Group
High temperature: 
Stable at room temperature
Geological context: 
Major constituent of most bauxite ores that are secondary deposits from supergene alteration.

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
59.988 19.540 -918406 -996400 37.200 54.24
Reaction properties

Boehmite + 3H+ ⇌ Al+3 + 2H2O

298.15 K, 1 bar log10K: 7.63 ΔH°r: -113660 J·mol-1
T(°C) 0 25 60 100 150 200 250 300
log10K 9.44 7.63 5.53 3.59 1.64 0.03 -1.40 -2.73