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Near-infrared (NIR) spectra of carbonates have proved important in many disciplines including planetary exploration. Classically bands in the 4000–6000cm−1 (2.5–1.67μm) region are assigned to [CO32–] internal mode combinations and overtones. However band assignments remain equivocal. This study examines three prominent bands ((ca 4505cm−1 (2.219μm), 4900cm−1 (2.041μm) and 5145cm−1 (1.944μm)) from...
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