Abstract
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·cm 2 ) 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).
Original language | American English |
---|---|
Journal | American Mineralogist |
Volume | 80 |
DOIs | |
State | Published - Dec 1 1995 |
Externally published | Yes |
Keywords
- absorption
- basanite
- carbonates
- glasses
- igneous rocks
- infrared spectra
- solutes
- spectra
- volcanic glass
- volcanic rocks
- molar
Disciplines
- Life Sciences