Syntheses and characterization of zero-dimensional molybdoantimonites, A2(Mo4Sb2O18) (A=Y, La, Nd, Sm, Gd and Dy)

Materials Discovery by Flux Crystal Growth: Quaternary and Higher Order Oxides

“…The yellow hexagonal block crystals of RbMnVO 4 were accompanied by clear crystals of RbVO 3 , dark green crystals of MnO, and yellow‐green crystals of Rb 2 MnV 2 O 7 . Red block crystals of Ln 2 (Mo 4 Sb 2 O 18 ) (Ln=Y, La, Nd, Sm, Dy) (Figure 19)99 were successfully grown in evacuated quartz tubes. The binary oxides Ln 2 O 3 and Sb 2 O 3 were reacted with molten MoO 3 at 900 °C for 4 days.…”

Solid-state synthesis and lanthanide photoluminescence of doped yttrium molybdo-antimonites, Y2−nAnMo4Sb2O18 (A=Pr, Sm, Eu, Tb, Dy, Ho, and Er; n=0.02–2) solid solutions

“…All of these 15 isostructural A 2 Mo 4 Sb 2 O 18 (A¼rare-earth metal) compounds have "zero-dimensional" structures and contain A 3 þ cations and discrete, centrosymmetric tetra-molybdo-diantimonite [1,2]. There are two crystallographically different A 3 þ ions, which reside on 4e Wyckoff sites with twofold symmetry (Fig.…”

“…The Y 2 Mo 4 Sb 2 O 18 compound [1] was used as a host matrix, and the yttrium ion was partially substituted by different amounts (1-100 mol%) of active lanthanide ions. Excitation and emission spectra of Y 2 À n A n Mo 4 Sb 2 O 18 (A ¼Pr, Sm, Eu, Tb, Dy, Ho, and Er; n ¼0.02-2) solid solutions were shown in Fig.…”

“…We reported [1,2] previously solid-state syntheses and structural characterization, by X-ray diffraction, of 15 isostructural A 2 Mo 4 Sb 2 O 18 (A¼ Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu) molybdo-antimonites in quaternary A/Mo/Sb/O (A¼rare-earth metal) systems. These compounds possess discrete (Mo 4 Sb 2 O 18 ) 6À anions and represent the first examples of rare-earth molybdoantimonites.…”

Auf der Suche nach neuen Materialien: Kristallzucht von quaternären und höherwertigen Oxiden in Flussmitteln

“…Neben den gelben hexagonalen blockförmigen Kristallen von RbMnVO 4 fanden sich klare Kristalle von RbVO 3 , dunkelgrüne Kristalle von MnO und gelbgrüne Kristalle von Rb 2 MnV 2 O 7 . Rote blockförmige Kristalle von Ln 2 (Mo 4 Sb 2 O 18 ) (Ln=Y, La, Nd, Sm, Dy) (Abbildung 19)99 wurden in evakuierten Quarzampullen gezüchtet. Dazu wurden die binären Oxide Ln 2 O 3 und Sb 2 O 3 in geschmolzenem MoO 3 bei 900 °C 4 d zur Reaktion gebracht.…”