Preparation and structural study from neutron diffraction data of R2MoO6 (R=Dy, Ho, Er, Tm, Yb, Y)

Characterization of the VUV excitation spectrum of BaZr(BO3)2:Eu

“…When co-doping Si 4+ , the band at 195 nm was enhanced clearly, where as for Ti 4+ , its intensity decreased. It has been calculated that the energy level of Si-O is 7.232 eV [20], but the Ti-O has no energy level in the region shorter than 200 nm, so the intensity excitation is in the order BaZr 0.9 Si 0.05 Eu 0.05 (BO 3 ) 2 4 BaZr 0.95 Eu 0.05 (BO 3 ) 2 4BaZr 0.9 Ti 0.05 Eu 0.05 (BO 3 ) 2 . In order to clarify the excitation band at 195 nm, the VUV excitation spectra of BaZr(BO 3 ) 2 :Eu co-doped with several concentrations of Si 4+ are shown in Fig.…”

Oxygen‐Deficient R2MoO6–δ (R = Tb, Dy, Y, Ho, Er, Tm, Yb) with Fluorite Structure as Potential Anodes in Solid Oxide Fuel Cells

“…[6] Depending on their size or the synthesis conditions, the compounds of the R 2 MoO 6 series have been described to crystallize in the monoclinic (α), cubic (β), or tetragonal (γ) polymorphs. [7,8] In a previous publication, we reported new α-R 2 MoO 6 polymorphs for the small-sized rare earths, R = Y, Dy, Ho, Er, Tm, Yb, [9] defined in the monoclinic C2/c space group, as well as a new cubic phase for R = Pr of actual stoichiometry Pr 5 Mo 3 O 16 . [10] Mo IV -containing oxides have been described to present very different physical properties as a function of the crystal structure and the presence or absence of Mo clusters of different sizes in the lattice.…”

“…Figure 6 illustrates, for R = Ho, that the oxygen deficiency values (δ) are around 1 oxygen atom per formula unit, as determined by NPD. After the oxidation process, taking place between approximately 500 and 800°C, the XRD diagram of the product corresponds to monoclinic Ho 2 MoO 6 , [9] containing Mo 6+ ions.…”

Studies on structural and thermal expansion properties of Ho2−xLnxMo4O15 (Ln=Er, Sm and Ce) solid solutions

“…In fact, a fifth oxygen neighbor O14 belonging to Mo(1)O 4 tetrahedron is 2.60(3)Å from Mo (2) [19][20][21]. Here, bond valence calculations for HoErMo 4 O 15 were performed using Brown-Altermatt empirical expression [21,22]:…”