作者: Ray L. Frost , Caroline Pinto
DOI: 10.1002/JRS.1711
关键词: Infrared 、 Diffraction 、 Silicate 、 Chemistry 、 Group (periodic table) 、 Analytical chemistry 、 Mineral 、 Raman spectroscopy
摘要: Selected joaquinite minerals have been studied by Raman spectroscopy. The are categorised into two groups depending upon whether bands occur in the 3250 to 3450 cm−1 region and 3600 region, or latter only. first set of is attributed water stretching vibrations second OH bands. In literature, X-ray diffraction could not identify presence units structure joaquinite. spectroscopy proves that mineral group contains their structure, some cases both units. A series at 1123, 1062, 1031, 971, 912 892 assigned SiO vibrations. Bands above 1000 attributable νas modes (SiO4)4− (Si2O7)6− observed 738, around 700, 682 668, 621 602 OSiO bending modes. patterns do appear match published infrared spectral either reason actual formulation mineral, which significant amounts Ti Nb Fe found. Copyright © 2007 John Wiley & Sons, Ltd.