Determination of temperature and enthalpy of melting of alkali disilicates by differential calorimetric analysis
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Alkali disilicates (lithium, sodium, potassium, rubidium, caesium) have been synthesized and the temperature, enthalpy and entropies of melting measured by differential calorimetric analysis. Unknown solid-solid transitions were detected for sodium and caesium disilicates. New X-ray diffraction patterns are given to characterize each disilicate.
KeywordsSodium Polymer Potassium Entropy Enthalpy
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- 1.F. C. Kracek,J. Phys. Chem. 34 (1939) 2863.Google Scholar
- 3.Range andWilligallis, ASTM 23-529i (American Society for Testing and Materials, Philadelphia, PA, 1964).Google Scholar
- 4.J. Willamson andF. P. Glasser,Chem. Glasses 7 (1966) 127.Google Scholar
- 5.R. Hultgren, P. D. Desai, D. T. Hawkins, M. Gleiser, K. K. Kelley andD. D. Wagmans, “Selected values of the thermodynamic properties of the elements” (American Society for Metals, Metals Park, OH, 1973).Google Scholar
- 6.Certificate Standard Reference Materials 720, US Department of Commerce (National Bureau of Standards, Washington, DC, 1970).Google Scholar
- 7.D. R. Stull andH. Prophet, “JANAF Thermochemical Tables”, National Standards Reference Data Series, 2nd Edn. (National Bureau of Standards, Washington, DC, 1971).Google Scholar
- 9.Y. Bottinga, private communication, 1985.Google Scholar
- 10.Z. D. Alekseeva,Zh. Neorgan. Khim. 8 (1963) 1426.Google Scholar
- 11.Idem. ibid. 11 (1966) 1171.Google Scholar