Abstract
The ternary palladium hydride K 3PdH 3 has been synthesized by the reaction of potassium hydride with palladium sponge in a pure hydrogen atmosphere. The crystal structure was determined by X-ray investigations on powdered samples and a neutron diffraction experiment on the deuterated compound. The room temperature modification (space group P4 2/ mnm) contains linear [PdH 2 2−] groups and additional hydride ions which are coordinated by potassium ions exclusively. In the cubic high temperature modification (space group Pm3 m) the movements of the [PdH 2 2−] groups result in a structure in which the arrangement of the metal cations correspond to the Cu 3Au type.
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