Spectral files to accompany the paper by Hofmeister, Wopenka, and Locock:

"Spectroscopy and Structure of hibonite, grossite, and CaAl2O4: implications for astronomical environments" Geochim Cosmochim Acta (2004).

Download All Data Files Here

CaAlO4merge.txt is tab delimited text of the merged spectra of synthetic CaAl2O4 in Figure 3a. The left column is the frequency in wavenumbers. The right column is the chemical absorbance (common logarithm based). The thickness of the sample is no more than 3 micron, see text section 5.2 for discussion.

Grosmerge.txt is tab delimited text of the merged spectra of synthetic grossite in Figure 3b. Pure isotopically normal sample was used except for the interval of 300 to 500 cm-1, where the 17O enriched sample was used. The left column is the frequency in wavenumbers. The right column is the chemical absorbance (common logarithm based). The thickness of the sample is no more than 0.4 micron, see text section 5.2 for discussion.

Hibsynmerge.txt is tab delimited text of the merged spectra of synthetic hibonite in Figure 3c. The left column is the frequency in wavenumbers. The right column is the chemical absorbance (common logarithm based). The thickness of the sample is no more than 2.2 micron, see text section 5.2 for discussion.

CaOmerge.txt is tab delimited text of the merged spectra of synthetic, dried, CaO in Figure 3d. The left column is the frequency in wavenumbers. The right column is the chemical absorbance (common logarithm based). The thickness of the sample is no more than 2.2 micron, see text section 5.2 for discussion.

Corsynmerge.txt is tab delimited text of the merged spectra of synthetic corundum in Figure 3d. The left column is the frequency in wavenumbers. The right column is the chemical absorbance (common logarithm based). The thickness of the sample is 0.45 micron, see text section 5.2 for discussion.

hibnatkramers.txt is tab delimited text of the merged reflectance spectra of natural hibonite, E perpendicular to c, and its Kramers-Kronig analysis. From left to right, columns are: frequency, real part of dielectric function, imaginary part of dielectric function, imaginary part of 1/dielectric function, reflectivity (0-1), absorption coefficient (1/cm), n, k, conductivity. Only the frequency column has units (1/cm). The data are shown in Fig. 4. Above about 1200 cm-1, the data have interference fringes.

farIRminerals.txt is tab delimited text of the far-IR data in Figure 6. The three columns are from left to right, mineral name, frequency, chemical absorbance. From top to bottom, the minerals are forsterite, diopside, enstatite, akermanite, gehlenite, and melilite. Film thickness is about 1 micron.

© 2006. All rights reserved.
Anne M. Hofmeister
Department of Earth & Planetary Sciences
Washington University, St. Louis, Missouri, USA