کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1233328 | 968806 | 2011 | 6 صفحه PDF | دانلود رایگان |
The mineral crandallite CaAl3(PO4)2(OH)5·(H2O) has been identified in deposits found in the Jenolan Caves, New South Wales, Australia by using a combination of X-ray diffraction and Raman spectroscopic techniques. A comparison is made between the vibrational spectra of crandallite found in the Jenolan Caves and a standard crandallite. Raman and infrared bands are assigned to PO43− and HPO42− stretching and bending modes. The predominant features are the internal vibrations of the PO43− and HPO42− groups. A mechanism for the formation of crandallite is presented and the conditions for the formation are elucidated.
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► The mineral crandallite CaAl3(PO4)2(OH)5·(H2O) has been identified in deposits found in the Jenolan Caves, using a combination of X-ray diffraction and Raman spectroscopy.
► A comparison is made between the vibrational spectra of crandallite found in the Jenolan cave and a standard crandallite.
► Raman and infrared bands are assigned to PO43− and HPO42− stretching and bending modes.
► The predominant features are the internal vibrations of the PO43 and HPO42− groups.
► A mechanism for the formation of crandallite is presented and the conditions for the formation are elucidated.
Journal: Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy - Volume 82, Issue 1, November 2011, Pages 461–466