A general study of packing in oxide glass systems containing alkali

The packing fraction, defined as the ionic volume divided by the molar volume, appears to hold promise as a general measure of the structure of alkali oxide modified glasses. For modifying ions having volumes larger than oxygen (K, Rb, and Cs), the packing is dominated by the modifier as alkali oxid...

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Published inJournal of non-crystalline solids Vol. 347; no. 1-3; pp. 87 - 92
Main Authors Giri, Sandeep, Gaebler, Carl, Helmus, Jonathan, Affatigato, Mario, Feller, Steve, Kodama, Masao
Format Journal Article
LanguageEnglish
Published Amsterdam Elsevier B.V 01.11.2004
Elsevier
Subjects
Condensed matter: structure, mechanical and thermal properties
Equations of state, phase equilibria, and phase transitions
Exact sciences and technology
Glass transitions
Physics
Specific phase transitions
F205
D130
S440
Molar volume
Vanadates
Cesium
Germanates
Silicates
Phosphate glass
Rubidium
Glass formation
Borates
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Summary:The packing fraction, defined as the ionic volume divided by the molar volume, appears to hold promise as a general measure of the structure of alkali oxide modified glasses. For modifying ions having volumes larger than oxygen (K, Rb, and Cs), the packing is dominated by the modifier as alkali oxide concentration increases and is largely independent of glass former; we define this as ionic packing. For alkali smaller than oxygen (Li and Na) the packing is controlled by the oxygen covalent network and is heavily dependent on glass former; we call this covalent packing. In this paper we compare the packing fractions of alkali borate, silicate, germanate, phosphate, and vanadate glass systems.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0022-3093
1873-4812
DOI:10.1016/j.jnoncrysol.2004.08.103