GLASS STRUCTURE AND PROPERTIES

Halide Glasses. Fluoride glasses are the most important of the haUde glasses. The only primary fluoride glass former is beryUium fluoride, 

Oxyhalide Glasses. Many glasses contain both oxide and haUde anions. The introduction of haUdes into an oxide glass typically serves to reduce the glass-transition temperature, T, and to increase the coefficient of thermal expansion. Oxyfluorophosphates have been investigated as laser host 

Carbonate Glasses. Carbonate glasses must be melted under moderate pressures to prevent the escape of carbon dioxide gas. The simplest carbonate glass forming system is K CO —MgCO.  

Sulfate Glasses. The sulfate ion is tetrahedral (quasispherical), so the formation of sulfate glasses is more difficult than the formation of nitrate glasses (4). The presence of cations of different valences appears to be necessary for sulfate glasses. An example is the ZnSO —K SO system. Glass 

Kirk-Othmer Encyclopedia of Chemical Technology (4th Edition) 

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