Structural, magnetic and spectroscopic investigations of europium oxychloride, EuOCl

Treatment of a waste salt delivered from an electrorefining process by an oxidative precipitation of the rare earth elements

“…(NdEuPr)O 3 Cl 3 ). These estimations coincide well with other researches: CeO 2 and PrO 2 have a cubic fluorite structure [15][16][17] and PrOCl, NdOCl and EuOCl have a tetragonal structure [18,19].…”

Synthesis, Structural and Magnetic Characterization of a New Scheelite Related Compound: Eu2Mo3O12

“…Below 15 K, a sharp decrease in the inverse susceptibility is observed. This has been already been observed with other Eu compounds, as in the oxychloride EuOX (X = Br, Cl), [15,16] and attributedto the presence of a slight amount of Eu 2+ impurity, since Eu 2+ with the 4 f 7 electron configuration has high paramagnetic susceptibility. In order to understand this phenomenon, a study on partially reduced Eu 3+ samples is in progress.…”

“…This behavior can be qualitatively explained by the exceptional 7 F J (J = 0-6) ground term energy level Scheme of the Eu 3+ ion. [16,17] The 7 F 0 -7 F 1 energy gap is large enough to induce a plateau in the inverse paramagnetic susceptibility curve due to the constant temperature independent paramagnetism, since practically only the ground level 7 F 0 is populated. The 7 F 0 ground level is non-magnetic and gives no contribution to the Eu 2 Mo 3 O 12 susceptibility at low temperatures.…”

EPR and luminescence studies of Eu(II) magnetically diluted in LiCl–KCl salt

“…The spontaneous reduction of europium from Eu 2 O 3 to a stable Eu(II) state without any external driving force is somewhat surprising. However, it is reported that stable Eu(II) may be produced in some cases under a high temperature and anaerobic conditions [10], as is the case in this study. Spectrum 3(b) shows the existence of Eu(III) as indicated by a circle in Fig.…”