Infrared reflection spectra of gypsum |
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| Affiliation: | 1. Laboratorio di Risonanza Magnetica “Annalaura Segre”, Istituto di Metodologie Chimiche, Consiglio Nazionale delle Ricerche (IMC-CNR), Area della Ricerca di Roma 1, Via Salaria km 29,300, 00015 Monterotondo (Roma), Italy;2. Dipartimento di Scienze Farmaceutiche, Università di Perugia, via Fabbretti 48, 06123 Perugia, Italy;3. Istituto per i Polimeri, Compositi e Biomateriali, Consiglio Nazionale delle Ricerche (IPCB-CNR), Via Campi Flegrei, 34, 80078 Pozzuoli (Napoli), Italy;4. Dipartimento di Chimica e Centro SMAArt, Università di Perugia, via Elce di Sotto 8, 06123 Perugia, Italy;1. Department of Neurosciences, Winthrop University Hospital, 222 Station Plaza, Mineola, NY 11501, USA;2. Department of Radiology, University of Pennsylvania, 317 Anatomy Chemistry Building, 3620 Hamilton Walk, Pennsylvania, PA 19104, USA;3. Department of Biochemistry and Molecular Biology, New York Medical College, Basic Sciences, 15 Dana Road, Valhalla, NY 10595, USA |
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| Abstract: | Polarized i.r. reflection spectra of gypsum single crystals have been measured and analysed using the Kramers—Kronig relation. The transverse and longitudinal frequencies are obtained together with the optical and dielectric constants of the crystal. The librational bands of water of crystallization are identified based on the i.r. spectra of deuterated powders and low-temperature i.r. spectra. Polarized Raman spectra have also been measured, which agree well with those reported previously. |
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