Structure and vibrational properties of scheelite type Cd0.25RE0.5□0.25MoO4 solid solutions where □ is the cationic vacancy and RE=Sm–Dy

Synthesis, structure, and thermal stability of new scheelite-type Pb1−3x□xPr2x(MoO4)1−3x(WO4)3x ceramic materials

“…The appearance of additional absorption band and a change in its position suggests the presence of other types of molybdenum and tungsten polyhedra, i.e., distorted MoO 4 as well as WO 4 tetrahedra with cationic vacancy near one or two corners of MoO 4 and WO 4 . The same phenomenon has been observed in the case of a similar solid solution with gadolinium ions (Cd 1-3x h x Gd 2x MoO 4 ) [33,34]. Gradual increase in the intensity of the additional IR band (at *930 cm …”

“…Our earlier studies on a reactivity in a solid state of divalent metal molybdates or tungstates (CdMoO 4 , CdWO 4 and others) with rare-earth compounds (molybdates or tungstates) have been showed an existence of new interesting materials for applications in optoelectronics [25][26][27][28][29][30][31][32][33][34]. The scheelite-type ceramic materials, i.e., Cd 0.25 RE 0.50-h 0.25 WO 4 (RE = Pr, Nd, Sm, Eu, and Gd, vacancy is denoted by h), were synthesized via a solid-state reaction of CdWO 4 with rare-earth ditungstates RE 2 W 2 O 9 [25][26][27][28].…”

“…As allows tuning of laser action over the 1030-to 1080-nm range for generation of very short pulses, and therefore, it has applications in pico-or femtosecond lasers [26]. Important group of very good and new candidates for applications in optoelectronics are scheelite-type cadmium and rare-earth metal molybdates Cd 1-3x h x RE 2x MoO 4 , where RE = Pr-Yb [29][30][31][32][33][34]. Value of x parameter strongly depends on a radius of trivalent rare-earth ion, and it can reach a maximum value of 0.25 [29][30][31][32][33][34].…”

“…Important group of very good and new candidates for applications in optoelectronics are scheelite-type cadmium and rare-earth metal molybdates Cd 1-3x h x RE 2x MoO 4 , where RE = Pr-Yb [29][30][31][32][33][34]. Value of x parameter strongly depends on a radius of trivalent rare-earth ion, and it can reach a maximum value of 0.25 [29][30][31][32][33][34]. The substitution of divalent cadmium ions by RE 3? ones leads to formation of cationic vacancies (h) in CdMoO 4 framework [29][30][31][32][33][34].…”

“…Value of x parameter strongly depends on a radius of trivalent rare-earth ion, and it can reach a maximum value of 0.25 [29][30][31][32][33][34]. The substitution of divalent cadmium ions by RE 3? ones leads to formation of cationic vacancies (h) in CdMoO 4 framework [29][30][31][32][33][34]. The appearance of vacancies results in some disorder of crystal lattice around RE 3? ions.…”