High-Pressure Brillouin Study of KH_2PO_4
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The pressure dependence of six ratios of elastic constants to density in the phases II and IV of potassium dihydrogen phosphate (KH<SUB>2</SUB>PO<SUB>4</SUB>) have been determined for a single crystal with tetragonal structure up to 7. 5 GPa at room temperature by high-pressure Brillouin spectroscopy. The C<SUB>11</SUB>/ρ, C<SUB>12</SUB>/ρ, C<SUB>13</SUB>/ρ, and C<SUB>33</SUB>/ρ increase in proportion to an increase in pressure, except for C<SUB>44</SUB>/ρ and C<SUB>66</SUB>/ρ which decrease against pressure. No anomaly on the elastic properties is found at the II-IV phase transition at 2. 7 GPa and at room temperature in comparison with previous studies.
- The Review of High Pressure Science and Technology
The Review of High Pressure Science and Technology 7, 721-723, 1998
The Japan Society of High Pressure Science and Technology