Ilmenite-rutile-iron and ulvospinel-ilmenite-iron equilibria and the thermochemistry of ilmenite (FeTiO sub 3 ) and ulvospinel (Fe sub 2 TiO sub 4 )
Journal Article
·
· Geochimica et Cosmochimica Acta; (USA)
- Australian National Univ., Canberra (Australia)
- Monash Univ., Clayton (Australia)
The ilmenite-rutile-iron equilibria and ulvospinel-ilmenite-iron equilibria have been studied in the temperature range 990-1320 and 1050-1355 K, respectively, using an electrochemical technique. Effects on experimental results from deviations from the ideal stoichiometries FeTiO{sub 3}, TiO{sub 2}, and Fe{sub 2}TiO{sub 4} have been modelled from available data in the literature. Results from the IRI equilibrium are in good agreement with most of the previous phase equilibrium studies. In detail, however, there is evidence of possible error in the calorimetric data for TiO{sub 2} or FeTiO{sub 3}, or both. For the UII equilibrium, results indicate Fe{sub 2}TiO{sub 4} probably has the theoretically ideal zero point entropy of 2R 1n 2, caused by mixing of Fe{sup 2+} and Ti on the octahedral site of this inverse spinel.
- OSTI ID:
- 7164141
- Journal Information:
- Geochimica et Cosmochimica Acta; (USA), Journal Name: Geochimica et Cosmochimica Acta; (USA) Vol. 52:8; ISSN GCACA; ISSN 0016-7037
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
58 GEOSCIENCES
580000* -- Geosciences
ALKALINE EARTH METAL COMPOUNDS
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CHALCOGENIDES
CHEMISTRY
ELECTROCHEMISTRY
EQUILIBRIUM
GEOCHEMISTRY
GEOTHERMOMETERS
GEOTHERMOMETRY
IGNEOUS ROCKS
ILMENITE
IRON COMPOUNDS
IRON OXIDES
MAGNESIUM COMPOUNDS
MAGNESIUM OXIDES
MATERIALS
MATHEMATICAL MODELS
MEASURING INSTRUMENTS
METAMORPHIC ROCKS
MINERALOGY
MINERALS
MOLECULAR MODELS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PHASE STUDIES
PHYSICAL PROPERTIES
RADIOACTIVE MATERIALS
RADIOACTIVE MINERALS
ROCKS
RUTILE
SPECIFIC HEAT
SPINELS
STOICHIOMETRY
THERMOCHEMICAL PROCESSES
THERMODYNAMIC PROPERTIES
THERMOMETERS
TITANIUM COMPOUNDS
TITANIUM OXIDES
TRANSITION ELEMENT COMPOUNDS
580000* -- Geosciences
ALKALINE EARTH METAL COMPOUNDS
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CHALCOGENIDES
CHEMISTRY
ELECTROCHEMISTRY
EQUILIBRIUM
GEOCHEMISTRY
GEOTHERMOMETERS
GEOTHERMOMETRY
IGNEOUS ROCKS
ILMENITE
IRON COMPOUNDS
IRON OXIDES
MAGNESIUM COMPOUNDS
MAGNESIUM OXIDES
MATERIALS
MATHEMATICAL MODELS
MEASURING INSTRUMENTS
METAMORPHIC ROCKS
MINERALOGY
MINERALS
MOLECULAR MODELS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PHASE STUDIES
PHYSICAL PROPERTIES
RADIOACTIVE MATERIALS
RADIOACTIVE MINERALS
ROCKS
RUTILE
SPECIFIC HEAT
SPINELS
STOICHIOMETRY
THERMOCHEMICAL PROCESSES
THERMODYNAMIC PROPERTIES
THERMOMETERS
TITANIUM COMPOUNDS
TITANIUM OXIDES
TRANSITION ELEMENT COMPOUNDS