Reorientations and phase transitions in (Kr)1-x(CH4-nD
n
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| Authors: | R Böhmer A Loidl |
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| Institution: | (1) Institut für Physik der Johannes Gutenberg-Universität and Materialwissenschaftliches Forschungszentrum Mainz, Staudinger Weg 7, D-6500 Mainz 1, Germany;(2) Present address: Department of Chemistry, Arizona State University, 85287 Tempe, AZ, USA |
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| Abstract: | The condensed isotopic modifications of methane, CH4, CH2D2, and CD4 and their solutions with Kr were investigated using dielectric techniques. The polarizabilities were computed from the permittivities of the pure liquids. Phase diagrams of methane-krypton alloys were deduced in the liquid-solid coexistence region and for the low temperature phases (T<30 K). From the Curielaws, which described the permittivities of the (Kr)1-x(CH2D2)x mixed crystals, the permanent dioole moment of CH2D2 is calculated to be 4 mD. In the octopolar ordered phases of the solid solutions the effective dipole moments are enhanced significantly. |
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