Инд. авторы:	Kuryaeva R.G., Dmitrieva N.V., Surkov N.V.
Заглавие:	Refractive index and compressibility of LiAlSi3O8 glass in the pressure range up to 6.0 GPa
Библ. ссылка:	Kuryaeva R.G., Dmitrieva N.V., Surkov N.V. Refractive index and compressibility of LiAlSi3O8 glass in the pressure range up to 6.0 GPa // Materials Research Bulletin. - 2016. - Vol.74. - P.360-366. - ISSN 0025-5408.
Внешние системы:	DOI: 10.1016/j.materresbull.2015.10.037; SCOPUS: 2-s2.0-84946944245; WoS: 000367775000053;
Реферат:	eng: The refractive index and the relative changes in the density for LiAlSi3O8 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 NaAlSi3O8 and KAlSi3O8 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 LiAlSi3O8 glass was calculated. A high degree of depolymerization of the LiAlSi3O8 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. © 2015 Elsevier Ltd.
Ключевые слова:	Structural networks; Structural groups; Polarization interferences; Literature data; High pressure; Elastic properties; Degree of depolymerization; Alkali metal cations; Optical properties; Microscopes; Refractive index; Equations of state; Coordination reactions; Compressibility; Aluminum; Optical properties; High pressure; Glasses; Equations-of-state; Elastic properties; Glass;
Издано:	2016
Физ. характеристика:	с.360-366