The method used is divided into two parts. One part is the determination of La, Ce, Pr and Sm by pretreatment neutron activation analysis. The other part is the
Six kinds of typical commercial Fe2O3 were sampled and divided into two groups A and B. according to the magnetic measurement results. The samples of group A ar
Mossbauer absorption spectra in a natural chromite from Shanxi province of China were measured, covering a temperature range from 12 K to 800 K. Each spectrum a
Electrolyte-diffusion of CoSO4 in pure aqueous solution is studied at 25 ℃ over a concentration range of 10-5-0.25 mol/l. The measurement of diffusion coeffici