The reaction of [Au,L,]2+ (L = PPh,) with an excess of Li[Co(CO),] in tetrahydrofuran results in the formation of Au,L,[Co(CO),],, the structure of which has been determined by X-ray crystallography.

Velocity calibration of a Mössbauer spectrometer operating in a constant acceleration mode has been obtained with a Michelson interferometer using an (Al, Ga)As laser diode. The very small size of the laser diode makes it possible to construct a very compact optical system for velocity calibration.

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