Structural interpretations for some Raman lines from vitreous silica

Abstract An interpretation based on non-random structural features is advanced for the 490 and 604 cm−1 Raman lines from vitreous silica. The sharp, polarized 490 cm−1 line is considered to arise from a small concentration of planar rings involving three SiO 4 2 tetrahedra. The somewhat broader line at 604 cm−1 is thought to be associated with rings of various sizes, both planar and puckered, that are connected to the rest of the structure by elongated SiO bonds. Changes in the concentration and/or Raman scattering cross-section of these ring structures produced by changes in fictive temperature, neutron irradiation, high elastic tensile and compressive stresses, annealing, and by changes in the SiOH content are thought to produce the intensity variations observed in these two Raman lines.

[1]  G. Lucovsky.  Spectroscopic evidence for valence-alternation-pair defect states in vitreous SiO2 , 1979 .

[2]  W. Noll.  Die silicatische Bindung vom Standpunkt der Elektronentheorie , 1963 .

[3]  W. Spitzer,et al.  Theory of the Optical Properties of Quartz in the Infrared , 1962 .

[4]  G. Walrafen,et al.  Raman spectrum of pressure compacted fused silica , 1981 .

[5]  J. T. Krause,et al.  Raman scattering and far infra-red absorption in neutron compacted silica , 1970 .

[6]  F. L. Galeener,et al.  Thermal equilibration of raman active defects in vitreous silica , 1980 .

[7]  R. Mozzi,et al.  The structure of vitreous silica , 1969 .

[8]  J. Scott,et al.  Longitudinal and Transverse Optical Lattice Vibrations in Quartz , 1967 .

[9]  R. W. Hendricks,et al.  Neutron irradiation effects and structure of noncrystalline SiO2 , 1974 .

[10]  Shiv k. Sharma,et al.  Raman investigation of ring configurations in vitreous silica , 1981, Nature.

[11]  T. Ha,et al.  A theoretical study of the electronic structure of disiloxane [(SiH3)2O] and its relation to silicates , 1980 .

[12]  D. Appleman,et al.  The crystal structure of low tridymite , 1978 .

[13]  R. Stolen,et al.  Water and its relation to broken bond defects in fused silica , 1976 .

[14]  J. D. Jorgensen,et al.  Compression mechanisms in α‐quartz structures—SiO2 and GeO2 , 1978 .

[15]  G. Walrafen,et al.  Raman investigation of vitreous and molten boric oxide , 1980 .

[16]  K. Schaumburg,et al.  Infrared and Raman Spectra of Cyclic Dimethylsiloxane Oligomers. , 1971 .

[17]  P. N. Krishnan,et al.  Raman investigation of optical fibers under high tensile stress , 1981 .

[18]  C. M. Bastuscheck,et al.  Superconductivity in niobium triselenide , 1980 .

[19]  R. J. Bell,et al.  The structure of vitreous silica: Validity of the random network theory , 1972 .

[20]  J. Krogh-Moe.  The structure of vitreous and liquid boron oxide , 1969 .