Determination of the Molar Absorptivity of Dissolved Carbonate in Basanitic Glass
absorption, basanite, carbonates, glasses, igneous rocks, infrared spectra, solutes, spectra, volcanic glass, volcanic rocks, molar
Digital Object Identifier (DOI)
Basanitic glasses with known dissolved C concentrations have been analyzed using infrared spectroscopy to calibrate the molar absorptivity of carbonate. C is dissolved as carbonate complexes in the glass resulting in absorption bands at 1525 and 1425 cm−1. Molar absorptivities of 283 ± 8 L/(mol·cm) were determined for both 1525 and 1425 cm−1 absorption bands. An integrated molar absorptivity of 60000 ± 1700 L/(mol·cm2) was determined using the integrated area under the doublet. These values are about 20–25% lower than those determined for tholeiitic and leucititic glasses and are intermediate between values characteristic of Na- and Ca-rich silicate glasses. Carbonate molar absorptivities for a range of basaltic glass compositions correlate with the molar ratio of Na/(Na + Ca).
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Citation / Publisher Attribution
American Mineralogist, v. 80, no. 11-12, p. 1339-1342
Scholar Commons Citation
Dixon, Jacqueline Eaby and Pan, Vivian, "Determination of the Molar Absorptivity of Dissolved Carbonate in Basanitic Glass" (1995). Marine Science Faculty Publications. 1325.