Barium oxoaluminate hydride

Abstract

The crystal structure of Ba(3)(AlO(4))H is isotypic with Ba(3)SiS(5) and contains AlO(4)(5-) and H(-) anions. The hydride and oxide anions are coordinated by six Ba and five Ba/one Al atoms in an octahedral geometry. The hydrogen content was examined by MAS-NMR experiments of the deuterated compound.

Ba3CrN3H: A New Nitride-Hydride with Trigonal Planar Cr4+

“…These “channels” are face-shared, distorted octahedra with hydrogen in the center of each octahedron (Figure b). HBa 6 octahedra are also present in other hydrides: In both Ba 3 AlO 4 H , and Ba 9 In 4 H, the octahedra form a three-dimensional framework of corner-shared octahedra, while in Ba 21 M 2 O 5 H 12+ x (M = transition metals and metalloids), the face-sharing octahedra are arranged in a ring around a common central barium position…”

Das Indid‐Hydrid Ba9[In]4[H]: Synthese, Kristallstruktur, NMR‐Spektroskopie, Chemische Bindung

“…Die chemische Verschiebung des 1 H‐Signals im Festkörperkernresonanz‐Spektrum der Titelverbindung (s. Experimenteller Teil ) von –9.0 ppm gegen TMS ist in guter Übereinstimmung mit den Werten anderer Ba‐Hydride wie z.B. BaH 2 (–8.7(1.0) ppm 21) und Ba 3 [AlO 4 ][D] (–6.1 ppm, gegen Hexamethylbenzol‐D18 22). Auch die chemischen Verschiebungen von H – in den Antimonid‐Hydriden Ba 8 [Sb] 4 [O][H] 2 und Ba 5 [Sb] 3 [H] liegen mit –8.5 bis –9 ppm (gegen TMS 11) ebenfalls in diesem Bereich.…”

Synthesis and Photoluminescence Properties of Rare-Earth-Activated Sr3–xAxAlO4H (A = Ca, Ba; x = 0, 1): New Members of Aluminate Oxyhydrides

“…In this Article, we report the new oxyhydride system Sr 3– x A x AlO 4 H (A = Ca, Ba; x = 0, 1) synthesized by solid-state reactions and its phosphor host properties. The synthesized samples can be handled in air for 1–10 days, unlike the previously reported aluminate-based oxyhydride Ba 3 AlO 4 H (orthorhombic, Pnma ), which is extremely sensitive to air and moisture. , Rietveld analysis of the neutron powder diffraction (NPD) patterns of the D-enriched samples shows that the crystalline phases are isostructural to Sr 3 AlO 4 F (also denoted as SAOF; tetragonal, I 4/ mcm ) with full occupation of D ions on the F sites. Isovalent substitution of Ba 2+ and Ca 2+ in Sr 3 AlO 4 H (also denoted as SAOH) shows the opposite site preference, and both can improve the overall stability.…”