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CHARACTERIZATION OF INDIAN NATURAL MINERAL ANDALUSITE USING XRD, OPTICAL ABSORPTION, INFRARED, EPR AND NMR SPECTROSCOPIC TECHNIQUES
unpublished
Andalusite, a variety of aluminosilicate mineral has been investigated through optical absorption and EPR studies. The morphology of the sample shows dense, homogeneous single-crystal structure. Prominent X-ray powder diffraction lines observed at the d-spacing 4.5255, 3.9339, 2.7898, 2.2969 and 1.2834Å confirm the crystalline nature of andalusite. Andalusite shows prominent characteristic infrared absorption bands in the region 1200-900, 900-630 and 600-450 cm-1 corresponding to Si-O. The
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