High-Pressure Raman and Infrared Spectroscopic Study of Prehnite

High-pressure Raman spectroscopic study of Fo90 hydrous wadsleyite

Raman spectra of monoclinic Fo90 hydrous wadsleyite with 2.4 wt% H2O have been measured in a diamond-anvil cell with helium as a pressure-transmitting medium to 58.4 GPa at room temperature. The most intense, characteristic wadsleyite modes, the Si–O– Si symmetric stretch at 721 cm 1 and the symmetric stretch of the SiO3 unit at 918 cm , shift continuously to 58.4 GPa showing no evidence of a f...

High-pressure Raman and infrared study of HfW2O8

B. Chen, D. V. S. Muthu, Z. X. Liu, A. W. Sleight, and M. B. Kruger Department of Physics, University of Missouri, Kansas City, Missouri 64110 Department of Physics, Indian Institute of Science, Bangalore 560 012, India Geophysical Laboratory and Center for High Pressure Research, Carnegie Institution of Washington, Washington, D.C. 20015 Department of Chemistry, Oregon State University, Corval...

Raman and infrared spectroscopic study of kamphaugite-(Y).

We have studied the carbonate mineral kamphaugite-(Y)(CaY(CO3)2(OH)·H2O), a mineral which contains yttrium and specific rare earth elements. Chemical analysis shows the presence of Ca, Y and C. Back scattering SEM appears to indicate a single pure phase. The vibrational spectroscopy of kamphaugite-(Y) was obtained using a combination of Raman and infrared spectroscopy. Two distinct Raman bands ...

Raman and infrared spectroscopic study of turquoise minerals.

Raman and infrared spectra of three well-defined turquoise samples, CuAl6(PO4)4(OH)8·4H2O, from Lavender Pit, Bisbee, Cochise county, Arizona; Kouroudaiko mine, Faleme river, Senegal and Lynch Station, Virginia were studied, interpreted and compared. Observed Raman and infrared bands were assigned to the stretching and bending vibrations of phosphate tetrahedra, water molecules and hydroxyl ion...

1 High - pressure Raman spectroscopic studies of hydrous wadsleyite II