Thermal Behavior of Howlite,Ca2B5SiO9(OH)5 |
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| Authors: | L. A. Gorelova M. G. Krzhizhanovskaya R. S. Bubnova |
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| Affiliation: | 1.Grebenshchikov Institute of Silicate Chemistry,Russian Academy of Sciences,St. Petersburg,Russia;2.St. Petersburg State University,St. Petersburg,Russia |
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| Abstract: | The thermal behavior of natural borosilicate howlite, Ca2B5SiO9(OH)5, is studied by the methods of high-temperature X-ray diffraction and differential thermal analysis in the temperature range of 30–1100°C. The thermal expansion is anisotropic (αmax/αmin = 3.6); the degree of anisotropy increases (αmax/αmin = 4.3) with a temperature increase up to 480°C (360–480°C). |
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