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CRYSTALLIZATION KINETICS AND GLASS FORMA
CONSTITUTION OF PHOSPHATE GLASSES
NUCLEAR MAGNETIC RESONANCE ABSORPTION
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absorption acid alkali Amer amorphous angle anions approximately band BeF2 behaviour bonds borates boron atoms boron oxide calculated cation cent metal oxide ceram chain length chem composition configurational coordination number corresponding coupling constant cristobalite crystal growth crystalline decrease diffraction electron entropy equation equilibrium experimental fluidity free volume frequency function glass formation glass forming tendency glass structure glass temperature glass transition temperature groups hydrogen hydrogen bonding increase infra-red investigated ionic ions kinetic lattice liquid silicates Mc/s method mole per cent molecular weight molecules nuclear magnetic resonance number average observed obtained oxygen partition function peaks phase phosphate glasses phosphorus Phys polymers properties quadrupole radial distribution curve random network ratio scattering segments shown in Figure silicate glasses silicon sodium solid Structure of Glass studies supercooled tetrahedra theoretical theory thermodynamic undercooled units values variation vibrations viscosity vitreous vitreous silica Warren Wazer X-ray diffraction Zachariasen