Crystal growth of bismuth(V) oxides from hydroxide fluxes

The first example of a 2 H-perovskite related A3A′BiO6 oxide, (Sr2.59Ba0.41)NaBiO6, with two different divalent cations on the A site, was synthesized in a reactive, mixed strontium-, barium-, sodium-hydroxide flux. (Sr2.59Ba0.41)NaBiO6 crystallizes in the space group R3¯c, with a = 9.9839(2) Å and c = 11.8008(4) Å. Crystals of isostructural oxides, Sr3NaBiO6 and Sr3LiBiO6, were also obtained from reactive Sr(OH)2, NaOH and LiOH fluxes. Sr3NaBiO6 and Sr3LiBiO6 crystallize in the space group R3¯c with a = 9.9193(2) Å, c = 11.7473(5) Å and a = 9.9293(2) Å, c = 11.4188(5) Å, respectively. In addition, we report the crystal growth of a strontium bismuth oxyhydroxide, Sr4(BiO6)(OH), isolated from a reactive Sr(OH)2 flux contained in sealed silver tubes. Sr4(BiO6)(OH) crystallizes in the monoclinic space group, P21 with a = 6.9429(8) Å, b = 6.1286(7) Å, c = 9.2746(10) Å, and β = 102.176(2)°. The structure consists of layers of connected SrOx polyhedra, with isolated BiO6 octahedra located in every second Sr–O layer.

Single crystals of two new bismuth(V) oxides, (Sr2.59Ba0.41)NaBiO6 and Sr4(BiO6)(OH), were grown from reactive hydroxide fluxes and characterized by single crystal X-ray diffraction.Figure optionsDownload as PowerPoint slide