The free energy of formation of Mg2TiO4 (synthetic qandilite), an inverse spinel with configurational entropy
Synthetic qandilite (Mg2TiO4) is an inverse spinel in which random mixing of Mg and Ti on the octahedral site should give rise to a configurational entropy of 11.5 J K-1 mol -1. The free energy of formation of Mg2TiO 4 has been determined from the location of the univariant reaction MgTiO3 + MgO = Mg2TiO 4 in pressure-temperature space between 0 and 20 kbar; together with literature data for MgTiO3 and MgO, the results give S(98K)0 = 111.2 ± 0.6 J K-1 mol-1 for Mg2TiO4. This entropy is only 7.6...[Show more]
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|Source:||European Journal of Mineralogy|
|01_O'Neill_The_free_energy_of_formation_2005.pdf||3.67 MB||Adobe PDF||Request a copy|
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