Trends in rare earth thiophosphate syntheses: Rb3Ln(PS4)2 (Ln = La, Ce, Pr), Rb3−xNaxLn(PS4)2 (Ln = Ce, Pr; x = 0.50, 0.55), and RbEuPS4 obtained by molten flux crystal growth

Crystal structures of new rubidium rare earth thiophosphates with the formulas Rb₃Ln(PS₄)₂ (Ln = La, Ce, Pr), Rb_3−xNa_xLn(PS₄)₂ (Ln = Ce, Pr; x = 0.50, 0.55), and RbEuPS₄ crystallized out of a molten RbCl flux.