Abstract
Preston and Trotter1 have described a change of symmetry with temperature in the Laue photographs of basic beryllium acetate, Be4O(CH3COO)6. This change of symmetry, according to Preston and Trotter, is a reversible one and occurs between 30° and 50° C. At the higher temperature the crystal class possesses three-fold axes with parallel mirror-planes, whereas at the lower temperature only the three-fold axes are present. Preston and Trotter suggest that the increase in symmetry is due to the setting in of molecular vibration of the acetate groups.
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References
NATURE, 151, 166 (1943).
Proc. U.S. Nat. Acad. Sci., 20, 340 (1934).
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BEEVERS, C. Change of Symmetry of Basic Beryllium Acetate. Nature 152, 447 (1943). https://doi.org/10.1038/152447a0
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DOI: https://doi.org/10.1038/152447a0
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