Glass, Volume 1 |
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Page 11
Bell and Dean ( 1966 ) found that a distribution of bond angles with a mean value
of 150° was obtained when a fused silica model was constructed , allowing for
the proper constraints such as density , entropy , stoichiometry , and bonding .
Bell and Dean ( 1966 ) found that a distribution of bond angles with a mean value
of 150° was obtained when a fused silica model was constructed , allowing for
the proper constraints such as density , entropy , stoichiometry , and bonding .
Page 32
Each unit shows the top oxygen in an unshared a bond configuration
corresponding to the short bond length . This bond is stronger than the other P -
O bonds so that it is not expected to produce a shift of the uv edge to longer
wavelengths .
Each unit shows the top oxygen in an unshared a bond configuration
corresponding to the short bond length . This bond is stronger than the other P -
O bonds so that it is not expected to produce a shift of the uv edge to longer
wavelengths .
Page 236
6 represents a computer fit to the experimental data which employs the crystalline
model for the E ' center and essentially a Gaussian distribution in the bond angle
between the unpaired spin and one of the Si – O bonds . Although the values ...
6 represents a computer fit to the experimental data which employs the crystalline
model for the E ' center and essentially a Gaussian distribution in the bond angle
between the unpaired spin and one of the Si – O bonds . Although the values ...
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absorption alkali annealing applied assumed atoms band birefringence bleaching bond borate glasses Bray Brillouin calculations caused Ceram charge Chem coefficient color composition concentration conductivity considered constant containing coordination copper crystal crystalline curve darkening density dependence described detailed determined dielectric diffusion discussed distribution effect electron energy equation equilibrium et al experimental fading field fluctuations frequency function given gives heat treatment hole increased indicated intensity ions levels light liquid material measured mole negative observed obtained optical oxide oxygen particles phase photochromic Phys polarization positive present probably produce properties range ratio reduced relaxation reported respectively sample scattering separation shift shown in Fig silicate glasses silver halide similar SiO2 sodium Solids spectra spectrum strain stretching structural studied Taylor techniques temperature term thermal tion transition trapped units unpublished wavelengths York