Abstract
The alkaline earth metals calcium, strontium and barium with the highest purities reported hitherto were prepared by metallothermic reduction of their high purity oxides with high purity aluminium in ultrahigh vacuum. The vapour pressure of aluminium at the reduction temperature is considerable (approximately 0.01 mbar), resulting in contamination of the alkaline earth metal condensates. By subsequent ultrahigh vacuum distillation (calcium, 880 °C; barium, 880 °C; strontium, 760 °C) the content of the aluminium impurity was markedly decreased. The high purity metals calcium, strontium and barium were characterized by trace analytical techniques and by the residual resistivity ratio. The trace analytical techniques were standardized chemically.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
