Scanning electron microscopy with energy dispersive spectroscopy and Raman and infrared spectroscopic study of tilleyite Ca5Si2O7(CO3)2-Y.

Submitted by Marise Leite (marise_mg@yahoo.com.br) on 2015-12-16T11:46:18Z No. of bitstreams: 1 ARTIGO_ScanningElectronMicroscopy.pdf: 1160910 bytes, checksum: c5982f080b53d45f85dd2914185eb5c7 (MD5)Approved for entry into archive by Oliveira Flávia (flavia@sisbin.ufop.br) on 2015-12-17T16:51:36Z (GMT) No. of bitstreams: 1 ARTIGO_ScanningElectronMicroscopy.pdf: 1160910 bytes, checksum: c5982f080b53d45f85dd2914185eb5c7 (MD5)Made available in DSpace on 2016-01-18T16:17:58Z (GMT). No. of bitstreams: 1 ARTIGO_ScanningElectronMicroscopy.pdf: 1160910 bytes, checksum: c5982f080b53d45f85dd2914185eb5c7 (MD5) Previous issue date: 2015The mineral tilleyite-Y, a carbonate-silicate of calcium, has been studied by scanning electron microscopy with chemical analysis using energy dispersive spectroscopy (EDX) and Raman and infrared spectroscopy. Multiple carbonate stretching modes are observed and support the concept of non-equivalent carbonate units in the tilleyite structure. Multiple Raman and infrared bands in the OH stretching region are observed, proving the existence of water in different molecular environments in the structure of tilleyite. Vibrational spectroscopy offers new information on the mineral tilleyite