RAMAN SPECTRA AND STRUCTURE OF BAO-SIO2, SRO-SIO2 AND CAO-SIO2 MELTS TO 1600°C
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dc.contributor.author | Frantz J.D. | |
dc.contributor.author | Mysen B.O. | |
dc.date.accessioned | 2020-11-24T04:34:52Z | |
dc.date.available | 2020-11-24T04:34:52Z | |
dc.date.issued | 1995 | |
dc.identifier | https://elibrary.ru/item.asp?id=656418 | |
dc.identifier.citation | Chemical Geology, 1995, , 1, 155-176 | |
dc.identifier.issn | 0009-2541 | |
dc.identifier.uri | https://repository.geologyscience.ru/handle/123456789/19473 | |
dc.description.abstract | Raman spectra were collected for barium silicate, strontium silicate and calcium silicate melts at temperatures ranging from the glass transition region to temperatures as high as 1600°C. For melts less polymrized than disilicate, the spectra were used to determine the relative abundances of the Q3, Q2 and Q1 tetrahedra and the Si2O2-5, SiO2-3 and Si2O6-77 structural units in the melts. A concentration constant was computed for the reaction: 4SiO2-3 # Si2O2-5 + Si2O6-7 and was found to vary with composition from approximately log10 Kc = 0.5 for barium silicate melts with NBO/Si = 1.143 to log10 Kc = -1.75 for calcium metasilicate melts with NBO/Si = 2. Little difference was found to exist in the structural behavior of the melts on the three alkaline-earth silicate binary joins. Activity coefficients were computed for the SiO2-3 structural unit as a function of bulk composition. The logarithm of the activity coefficients and mole fraction of the structural unit are linearly correlated. | |
dc.title | RAMAN SPECTRA AND STRUCTURE OF BAO-SIO2, SRO-SIO2 AND CAO-SIO2 MELTS TO 1600°C | |
dc.type | Статья |
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