title: [Raman active vibrations of aluminosilicates].
abstract: 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.
authors.affiliation: China University of Geosciences, Beijing 100083, China.
authors.forename: Feng
authors.initials: F
authors.lastname: Pan
authors.forename: Xue-hui
authors.initials: XH
authors.lastname: Yu
authors.forename: Xuan-xue
authors.initials: XX
authors.lastname: Mo
authors.forename: Jing-lin
authors.initials: JL
authors.lastname: You
authors.forename: Chen
authors.initials: C
authors.lastname: Wang
authors.forename: Hui
authors.initials: H
authors.lastname: Chen
authors.forename: Guo-chang
authors.initials: GC
authors.lastname: Jiang