Preparation, structure and infrared spectrum of NaEuP2O7

Low‐Temperature Flux Synthesis, Crystal Structure and Ce‐Doped Luminescence of the First Lutetium Diphosphate NH4LuP2O7

“…[10] The structural investigation of NaEuP 2 O 7 [12] and NaGaP 2 O 7 [7] reveals new structural arrangements of type VII and type VIII, respectively.…”

“…Jansen et al [8] prepared CsYbP 2 O 7 by rigorous solid-state reaction (under argon at 1173 K) and characterized the crystal structure without further investigation. Most often it is not so easy to obtain the pure phase and carry out further purification by hightemperature solid reactions, as reported in the preparations of NaGdP 2 O 7 , [7] AYP 2 O 7 (A = Na, [9] K, [10] Cs [11] ), and NaEuP 2 O 7 [12] in the presence of an auxiliary solvent. The above compounds have been mostly prepared by reaction in solution and by the high-temperature flux method.…”

Phase equilibria in the ErPO4–KPO3 system

“…For the last few decades, double diphosphates of a general formula M I LnP 2 O 7 (M I = Li, Na, K, Rb, Cs, Tl, Ag; M III = Al, Ga, In, Fe, Sc, Y, Ln, transition metal) have attracted considerable interest [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19]. It has been primarily focused on the crystal structure, synthesis methods and prospective practical applications.…”

“…Ln 2 O 3 and M I PO 3 using a large amount of an alkali metaphosphate, the excess of which was washed away with hot water, sometimes with lithium chloride [1][2][3][4]; the annealing was carried out in the temperature range 550-750°C. 2.…”

“…They melt incongruently forming LnPO 4 [1]. 3 . It is known that both compounds melt congruently at 1896 ± 20°C [27,28] and 810 ± 20°C [29], respectively.…”