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The effect of site geometry, Ti content and Ti oxidation state on the Ti K-edge XANES spectrum of synthetic hibonite

Doyle, P. M.; Berry, Andrew J.; Schofield, P. F.; Mosselmans, J. F. W.


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]

CollectionsANU Research Publications
Date published: 2016-08-15
Type: Journal article
Source: Geochimica et Cosmochimica Acta
DOI: 10.1016/j.gca.2016.05.001
Access Rights: Open Access


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