A study of the hydrogen sorption properties, thermal stability and the character of the chemical bonds of Ho and Lu Me-H hydrides through the use of thermodesorption and X-ray absorption spectroscopy

Hydrogensorption properties and thermal stability of HoH2, HoH3 and LuH3 hydrides have been studied with the use of thermodesorption and X-ray absorption spectroscopy methods. A charge transfer from a metal to hydrogen was determined through the LIII-absorption spectra shift in these hydrides. The experiments conducted has demonstrated that in the case of REM hydrides as in the case of early studied hydrides of III and IV groups of the periodical table metals the correlation exists between value of charge transferred from metal to hydrogen (or ionicity of metal-hydrogen bonds) in metalhydrides and their thermal stability and decomposition temperature.