Spectroscopic investigation of the interaction of hydroxamate with bastnaesite (cerium) and rare earth oxides

Raman and Fluorescence Spectroscopy of CeO2, Er2O3, Nd2O3, Tm2O3, Yb2O3, La2O3, and Tb4O7

“…Most of the studies have used one laser source and the identification of Raman bands from fluorescence emissions is often ambiguous. Raman spectroscopy and fluorescent emissions are valuable techniques for identifying the interactions in the RE minerals flotation system [7]. The fundamental physics studies of REO fluorescence are not readily appreciated by mineral technologists, and there is a need for presenting the data to these investigators in a clear and unified way.…”

Depression Mechanism of Strontium Ions in Bastnaesite Flotation with Salicylhydroxamic Acid as Collector

“…As shown in Figure 9a, the O 1s spectrum of the original bastnaesite could be fitted reasonably, with two peaks at 531.57 eV and 532.3 eV. The O 1s peak positioned at 531.57 eV was attributed to the oxygen in carbonate group of bastnaesite [41], and the other peak positioned at 532.3 eV was related to the oxygen in hydroxyl species (≡ CeOH 0 ) [22,40,42]. Table 1.…”

“…The C 1s spectrum in Figure 8a exhibited two well-separated peaks at 284.8 eV and 289.6 eV. The components at 284.8 eV were assigned to carbon contamination, while the peak at 289.6 eV was assigned to the C of CO 2− 3 in bastnaesite [40,41]. As shown in Figure 8b, after strontium ion adsorption, the binding energy of C 1s in CO 2− 3 was 289.65 eV; this indicates that the chemical surroundings of the C atom in the carbonate group had not changed.…”

The Effect of Quartz on the Flotation of Fine Wolframite with Octyl Hydroxamic Acid

“…The peaks at 2955 cm −1 , 2918 cm −1 , 2849 cm −1 , and 724 cm −1 referred to stretching vibrations and bending vibrations of -CH 3 /-CH 2 -groups. Additionally, the peaks at 1662 cm −1 and 1623 cm −1 correspond to the characteristic peaks of the C=O stretching vibration and the C=N stretching vibration, respectively [21,22]. In the quartz spectrum (Figure 10a), the peaks at 3427 cm −1 and 1620 cm −1 belonged to the stretching vibration of -OH and the bending vibration of -OH from Si-OH silanol groups, respectively.…”