Polymorphism in yttrium molybdate Y2Mo3O12

The Power of Non-Hydrolytic Sol-Gel Chemistry: A Review

“…Thus, it was shown, that Al-O-Ti system offers highly homogeneous products, which formed a metastable pseudo-brookite β-Al 2 TiO 5 phase during the calcination [59,60]. Similarly, many other systems were shown to produce highly homogeneous materials, as well as new and metastable phases (e.g., ZrTiO 4 [61], M 2 Mo 3 O 12 (M = Ga, Y, Sc, Fe, In, Al)) [62][63][64][65]. High homogeneity was described in the Al-O-Si [66] and Zr-O-Si [67] mixed oxides as well.…”

“…Scandium, indium, and iron molybdates were obtained in the crystalline form at temperatures as low as 230 • C [62]. Moreover a new polymorph of Y 2 Mo 3 O 12 thermodynamically stable below 550 • C was observed (Pba2, Figure 8) [64] and a completely new compound Ga 2 Mo 3 O 12 was prepared from GaCl 3 and MoCl 5 . This thermodynamically unstable ternary oxide was obtained through the homogeneous mixing of Ga and Mo at the atomic level.…”

“…One of their research topics is the synthesis of crystalline ternary and quaternary metal oxides with A 2 M 3 O 12 stoichiometry (A = Al, Sc, Fe, In, Ga, Y, Mg-Zr, Mg-Hf, etc. ; M = Mo or W) that exhibit negative thermal expansion (NTE) [62][63][64][65]188,189]. The intrinsic advantage of NHSG chemistry-a high homogeneity of element mixing was fully exploited for NTE materials preparation.…”

Solid state reaction synthesis and optical spectroscopy of ferroelectric (Gd1−Ln )2(MoO4)3; with Ln = Yb or Tm

“…Compound edge, but interesting information is available on Y 2 (MoO 4 ) 3 which attracted interest by its negative thermal expansion [17][18][19]. This compound crystallizes in the orthorhombic Pbcn (no.…”

Controlled synthesis, characterization and photoluminescence property of olive-like tetragonal α-Nd2(MoO4)3

“…Among all inorganic nanomaterials, rare earth molybdates have attracted a great deal of interests due to their unique optical, catalytic, thermal, electronic and magnetic properties [2][3][4][5][6][7]. A variety of approaches have been employed to prepare rare earth molybdates with controlled morphology and regular particle sizes, for example, the coprecipitation method synthesized flower-like Y 2 (MoO 4 ) 3 [8], the melt quenching technique prepared Eu 4 Mo 7 O 27 and Eu 6 Mo 10 O 39 [9], the Czohralski method obtained Tb 2 (MoO 4 ) 3 [4], the floatingzone approach formed Sm 2 Mo 2 O 7 single-crystal [10], the Pechini method synthesized Gd 2 (MoO 4 ) 3 nanoparticle [11], the sol-gel process fabricated Y 2 Mo 3 O 12 [12], the surfactant-assisted ultrasound route [13] and the hydrothermal method [14] synthesized La 2 (MoO 4 ) 3 micropompon. Among rare earth molybdates, neodymium molybdate has been studied due to the structure, magnetic and physical properties [15][16][17].…”