A commonly-used method in ore exploration is hydrogen peroxide ammonium citrate (HA) extraction, which has not typically been used waste rock characterization. In this study, the sulfide specificity and leaching of other minerals HA extraction was evaluated its performance compared with aqua regia (AR) for preliminary assessment harmful element mobility. Samples collected from several different...

The crystal structures of natural (Mt. Koashva, Khibiny alkaline massif, Kola Peninsula, Russian Arctic) and synthetic (obtained from an aqueous solution sodium phosphate fluoride (1:1) by evaporation at room temperature (RT)) natrophosphate, Na7(PO4)2F·19H2O, have been investigated using single-crystal X-ray diffraction analysis. Natrophosphate its analogue are cubic, Fd-3c, a = 27.6942(3) Å (...