Glass structural studies for borosilicates of the KBSi2O6—RbBSi2O6 system from X-ray diffraction data
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Alexandr Levin
Abstract
Abstract. For technologically important borosilicate glass and crystalline phases, the structure of K1−xRbxBSi2O6 (x = 0.0, 0.2, 0.4, 0.6, 0.8, 1.0) solid solutions has been investigated employing X-ray diffraction data. Glass samples were prepared by a melt quenching from 1250–1300 °C for 0.5–1 hour. For glass samples glass transition(Tg), crystallization (Tcryst) and melting (Tm) temperatures were determined by differential scanning calorimetry. To investigate the glass structure, angle-dispersive X-ray diffractometry was applied by using an energy-resolving semiconductor detector. The radial distribution functions (RDFs) were calculated. Comparing correlation distances of glass RDFs and mean interatomic distances calculated for polycrystalline samples, the conclusion is drawn that in the glass state not only TO4 (T = Si, B) tetrahedra as stable structure-units but two corner sharing tetrahedra and apparently fourfold rings from tetrahedra exist.
© by Oldenbourg Wissenschaftsverlag, München, Germany
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Articles in the same Issue
- Friedrich Liebau (1926–2011) Memorial
- On the symmetry and atomic ordering in (OH,F)-rich spessartine: towards a new hydrogarnet end-member
- Structural and 57Fe Mössbauer spectroscopic characterization of the synthetic NaFeSi2O6 (aegirine) – CaMgSi2O6 (diopside) solid solution series
- A neutron/X-Ray diffraction, IR, and 1H/29Si NMR Spectroscopic investigation of armenite: behavior of extra framework Ca cations and H2O molecules in microporous silicates
- RUB-55, a new hydrous layer silicate with silicate layers known as motives of the sodalite and octadecasil frameworks: Synthesis and crystal structure
- Crystal structure and morphology of fully hydrated zeolite Na-A
- A new borosilicate feldspar, KBSi3O8: synthesis, crystal structure and thermal behavior
- The crystal structure of aklimaite, Ca4[Si2O5(OH)2](OH)4 · 5 H2O
- The [9]-coordinated X site in the crystal structure of tourmaline-group minerals
- Crystal structure of 2M and 1A polytypes of balangeroite
- Twinnite, Pb0.8Tl0.1Sb1.3As0.8S4, the OD character and the question of its polytypism
- The new oxosilicate NaTbSi2O6: A comparison of its A- and D-type structure
- K2Ba5Si12O30 – a member of a homologous series among layered potassium barium silicates
- Synthesis and structures of two open-framework manganese phosphate-silicates
- Glass structural studies for borosilicates of the KBSi2O6—RbBSi2O6 system from X-ray diffraction data
