Refractive index and compressibility of LiAlSi3O8 glass in the pressure range up to 6.0GPa
| Autor: | N.V. Dmitrieva, R.G. Kuryaeva, N.V. Surkov |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Materials science
Depolymerization Mechanical Engineering Analytical chemistry chemistry.chemical_element Diamond Mineralogy 02 engineering and technology engineering.material 010502 geochemistry & geophysics 021001 nanoscience & nanotechnology Condensed Matter Physics Polarization (waves) Alkali metal 01 natural sciences chemistry Mechanics of Materials Aluminium Compressibility engineering General Materials Science 0210 nano-technology Refractive index 0105 earth and related environmental sciences Natural bond orbital |
| Zdroj: | Materials Research Bulletin. 74:360-366 |
| ISSN: | 0025-5408 |
| Popis: | The refractive index and the relative changes in the density for LiAlSi 3 O 8 glass in the pressure range up to 6.0 GPa were obtained using a polarization-interference microscope and an apparatus with diamond anvils. The results were compared with the previous data for the NaAlSi 3 O 8 and KAlSi 3 O 8 glasses. The compressibility of glasses increases in a series of alkali metal cations Li + , Na + , K + . From the previously found dependence of the compressibility (at P = 4.0 GPa) on the degree of depolymerization the value of NBO/T = 0.31 for LiAlSi 3 O 8 glass was calculated. A high degree of depolymerization of the LiAlSi 3 O 8 glass indicates not only a high content of NBOs atoms in the structural network, but also the presence of highly coordinated aluminum (according to the literature data ∼9%). The proposed schematic reaction for the formation of different structural groups corresponds to the condition of the existence of 9% highly coordinated aluminum. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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