Spectra of Fe-Ti silicate glasses - Implications to remote-sensing of planetary surfacesOptical spectra of synthetic Fe-Ti silicate glasses and the temperature variations of the spectral features were investigated. The spectra are assigned to absorptions due to crystal field (CF) transitions in Ti(3+), Fe(2+) in octahedral coordination, and Fe(2+) in tetrahedral coordination, and to metal-metal and oxygen-metal charge transfer (CT) transitions which contribute to the near ultraviolet absorption edge. Temperature variations of the optical bands have been studied to explore implications for remote sensing. Caution is urged in the use of the absorption edge as a measure of TiO2 concentrations on planetary surfaces and in regolith samples.
Document ID
19800039487
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Nolet, D. A. (Massachusetts Inst. of Tech. Cambridge, MA, United States)
Burns, R. G. (MIT Cambridge, Mass., United States)
Flamm, S. L. (Massachusetts Inst. of Tech. Cambridge, MA, United States)
Besancon, J. R. (Wellesley College Wellesley, Mass., United States)