The effect of site geometry, Ti content and Ti oxidation state on the Ti K-edge XANES spectrum of synthetic hibonite
The Al-rich oxide hibonite (CaAl¹²O¹⁹) is modeled to be the second mineral to condense from a gas of solar composition and is found within calcium–aluminum-rich inclusions and the matrix of chondritic meteorites. Both Ti³⁺ and Ti⁴⁺ are reported in meteoritic hibonite, so hibonite has been proposed as a single mineral oxybarometer that could be used to elucidate conditions within the first 0.2 Myrs of the Solar System. Synthetic hibonites with Ti³⁺/(Ti³⁺ + Ti⁴⁺) (hereafter Ti³⁺/ΣTi) ranging...[Show more]
|Collections||ANU Research Publications|
|Source:||Geochimica et Cosmochimica Acta|
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