[Raman active vibrations of aluminosilicates].
Raman spectra of aluminosilicate minerals, namely kyanite, andalusite, and sillimanite and K2O-Al2O3-SiO2 glasses were recorded. Four alumino-silicon tetrahedral model clusters were calculated by self-consistent (SCF) molecular orbital ab-ini-tio calculation of the quantum chem (QC) method. The result shows a decrease tendency in Raman frequencies in the 800-1200 cm(-1) frequency region with increase in four-coordinated Al content, which is assigned to the Si--Onb symmetry stretching vibrations. The Raman spectra in the 700-800 cm(-1) frequency region is attributed to Al-Onb symmetry stretching vibrations.
Pan
Feng
F
China University of Geosciences, Beijing 100083, China.
Yu
Xue-hui
XH
Mo
Xuan-xue
XX
You
Jing-lin
JL
Wang
Chen
C
Chen
Hui
H
Jiang
Guo-chang
GC