Crystal structure of (Mo,W)9O25, homologue of the Mo4O11 (orthorhombic)-type structure

(PO2)4(WO3)14Single Crystals of the MPTBpFamily: A HREM Study

“…Electron microscopy study of single crystals chosen from the same batch as that studied by X-ray diffraction appeared of interest trying to characterize under the microscopic point of view and to clarify the change of symmetry from even members (orthorhombic) to the odd m ϭ 7 member (monoclinic). Furthermore, X-ray diffraction results are very similar to those recently obtained on the isostructural (Mo, W) 9 O 25 compound (16,17).…”

Single Crystal Growth and Structural Characterization of a Novel Mixed-Valent Ternary Uranium Oxide, K8U7O24

“…ion. Some reduced uranium molybdates have been grown from hydrothermal [22] and subcritical hydrothermal [9,10] experiments. Several uranium silicates and germanates have been grown from hydrothermal conditions containing uranium(IV) [15,16], uranium(V) [8,14,17], or mixed-valent uranium [7,[11][12][13].…”

“…However, a few reduced uranium-containing oxides reported in the literature have been grown as single crystals using the flux growth method. Specifically, Cs 2 U 4 O 12 was grown from a Cs 2 SO 4 flux [23], (Cu,Mn)UMo 3 O 12 [21] and UMo 5 O 16 [22] were grown from a MoO 3 flux, and UNb 3 O 10 was grown from a boric acid flux [20]. Fluoride fluxes have been used previously for the growth of complex oxides [30].…”

“…Single crystal growth of such compounds has been achieved by chemical vapor transport (CVT) [1][2][3][4][5][6], hydrothermal methods [7][8][9][10][11][12][13][14][15][16][17], solid-state synthesis [18,19], and flux crystal growth [20][21][22][23]. The majority of these compounds have been grown under hydrothermal conditions and mostly under high temperatures and high pressures.…”

“…Flux crystal growth experiments reported in the literature that targeted reduced uraniumcontaining oxides used Cs 2 SO 4 [23], MoO 3 [21,22], or H 3 BO 3 as fluxes [20].…”