Actinide samples available for high-pressure studies and their preparation
The actinide material preparation programme at the Institute of Transuranium Elements consists of two different parts: - single crystals are grown to allow a systematic investigation of the physical properties of large families of isostructural compounds; - new compounds containing actinide elements are synthesized and their basic properties are investigated. Single crystals of congruently melting materials are pulled from the melt by the Czochralski method or by zone melting. Single crystals of compounds which decompose at the melting point by evaporation or peritectic decomposition are obtained by crystal growth from the solid (mineralisation), by chemical or physical vapour transport, or by crystallisation from solutions (molten salts and metals). Reliable and sensitive characterisation techniques have been developed for the quality control of the samples. Impurities at the ppm level are detected by spark source mass spectroscopy or by hot extraction chromatography. Scanning electron microscopy, metallography and electron microprobe analysis supply information about the sample homogeneity. Crystal structure and crystal orientation are determined by X-ray diffraction.
Bibliographic Reference: Article: High Pressure Research, Vol. 2 (1990) pp. 399-400
Record Number: 199110323 / Last updated on: 1994-12-02
Original language: en
Available languages: en