Synthesis, structure and luminescence properties of lanthanide compounds grown from phosphate-molybdate molten systems

The main crystallization trends of complex oxide compounds of lanthanides from alkaline phosphate-molybdate (tungstate) melts have been studied in light of structure - luminescence properties relationships. The regions of formation M^I3Ln(PO4)2, LnPO4, K2Ln(PO4)(M^VIO4), M^IM^III(M^VIO4)2 from self flux systems M^I-P-Ln-O (M^I-alkaline metal; M^VI-Mo, W) have been defined. The influence of M^I/M^VI ratio in the initial melt has been shown to play the key role in solid phase formation and structural peculiarities of LnOx polyhedral condensation of compounds obtained.