On the acoustic properties of CsD2PO4 and RbD2PO4 crystals near phase transitions under hydrostatic pressure

The influence of hydrostatic pressure on the temperature behaviour of acoustic properties in the vicinity of phase transitions of CsD2PO4 and RbD2PO4 crystals is studied. The pressure-temperature phase diagrams are obtained. The results are considered within the framework of phenomenological theory.

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