Porphine-like substances. III - Synthesis by electrical discharge

Dorphine compound synthesis from pyrrole- benzaldehyde mixture by electrical discharg

Solid oxide electrolyte emf cell determination of the standard free energy of Cr2O3 and applications to chromium-bearing mineral systems

Emf measurements are reported on cells using a thoria-yttria solid oxide electrolyte. The measured potentials from two cells, Cr, Cr2O3|ThO2-Y2O3|Co, CoQ and Cr, Cr2O3 |ThO2-Y2O3| Mn, MnO, were used to calculate the standard Gibbs free energy of formation of Cr2O3 in the temperature range 875-1275[deg]C. The two separate series of measurements are in good agreement with critically assessed data from the literature based on gas equilibration and calorimetric results.A summary of solid oxide electrolyte studies on mineral systems is presented with special attention paid to chromium-bearing solutions or compounds. The application of this experimental technique in investigating thermodynamic properties of chromium minerals is discussed.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/22053/1/0000471.pd