Phase formation in the Rb2MoO4-Er2(MoO4)3-Hf(MoO4)2 system and the crystal structure of new triple molybdate Rb5ErHf(MoO4)6

Synthesis, structural and vibrational properties of microcrystalline RbNd(MoO4)2

“…Complex molybdates display a variety of crystal structures and possess useful electro-physical, optical and catalytic properties [1][2][3][4][5][6][7][8]. Double molybdates containing alkali and trivalent metals are well known in literature and belong to the wide crystal family MLn(MoO 4 ) 2 (M-alkali metal and Ln-lanthanide) having important properties and applications.…”

Phase equilibria in the Tl2MoO4–R2(MoO4)3–Zr(MoO4)2 (R = Al, Cr) systems: synthesis, structure and properties of new triple molybdates Tl5RZr(MoO4)6 and TlRZr0.5(MoO4)3

“…The information about the phase formation in the Tl 2 MoO 4 -R 2 (MoO 4 ) 3 -Zr(MoO 4 ) 2 (R = Al, Cr) systems, which represent the bounding sides of the studied system, were taken from previous papers [3][4][5] 6 .…”

“…Rb 5 ErHf(MoO 4 ) 6 possesses the trigonal crystal structure: a = 10.7511(1) Å, c = 38.6543(7) Å, V = 3869.31(9) Å 3 , ρ calc =4.462 g/cm 3 , Z = 6, space group R3c [6]. The three-dimensional framework of the structure is formed of the MoO 4 tetrahedra, which are sharing corners with two ErO 6 and HfO 6 octahedra (Fig.…”

“…The lines for Tl 5 CrZr(MoO 4 ) 6 were indexed using Rb 5 ErHf(MoO 4 ) 6 [6] as analogous isostructural compound. The unit cell parameters that were refined using the TOPAS-4 software are listed in Table 1 along with the melting points of the corresponding compounds.…”

“…Earlier we studied phase equilibria in the Tl 2 MoO 4 -Fe 2 (MoO 4 ) 3 -Hf(MoO 4 ) 2 system [2]. Subsolidus phase diagrams for this system and constituent double systems were constructed, and triple molybdates Tl 5 FeHf(MoO 4 ) 6 and TlFeHf 0.5 (MoO 4 ) 3 had been detected. The aims of the present study include (1) investigation of phase equilibria in the ternary salt systems Tl 2 MoO 4 -R 2 (MoO 4 ) 3 -Zr(MoO 4 ) 2 (R = Al, Cr), (2) determination of optimal condition for the solid state synthesis of ternary molybdates found in these systems, and (3) determination of crystallographic and thermal characteristics of the obtained compounds.…”