Crystal growth, structures, and optical properties of the cubic double perovskites Ba2MgWO6 and Ba2ZnWO6

• Published in: Journal of solid state chemistry Vol. 184; no. 8; pp. 2293 - 2298
• Main Authors: BUGARIS, Daniel E, HODGES, Jason P, HUQ, Ashfia, ZUR LOYE, Hans-Conrad
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier 01.08.2011
• Subjects: CATIONS; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Condensed matter: structure, mechanical and thermal properties; Cross-disciplinary physics: materials science; rheology; CRYSTAL GROWTH; DIFFRACTION; Exact sciences and technology; INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; LUMINESCENCE; Materials science; Methods of crystal growth; physics of crystal growth; MONOCRYSTALS; NEUTRON DIFFRACTION; Neutron diffraction and scattering; OPTICAL PROPERTIES; Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation; Optical properties of bulk materials and thin films; PEROVSKITE; PEROVSKITES; Physics; POTASSIUM CARBONATES; Single-crystal and powder diffraction; SPACE GROUPS; Structure of solids and liquids; crystallography; Structure of specific crystalline solids; TUNGSTATES; X-RAY DIFFRACTION; Crystal growth; Cubic lattices; Space groups; Neutron diffraction; Luminescence; Polycrystals; Perovskites; XRD; High temperature; Tungstates; Tungstate; Monocrystals; Optical properties; Solid state reaction; Optical materials; Carbonates; Potassium; Melts; Crystal structure
• ISSN: 0022-4596; 1095-726X
• DOI: 10.1016/j.jssc.2011.06.015

Single crystals of the tungstates Ba{sub 2}MgWO{sub 6} and Ba{sub 2}ZnWO{sub 6} have been grown for the first time. The crystals were prepared with molten potassium carbonate acting as a flux. According to the single-crystal X-ray diffraction structure determination, the compounds crystallize in space group Fm3{sup -}m of the cubic system with a double perovskite structure, A{sub 2}BB'O{sub 6}. These structural findings were confirmed with neutron diffraction on polycrystalline samples synthesized by a high-temperature solid-state route. Both sets of diffraction data reveal that the M{sup 2+} and W{sup 6+} cations are fully ordered on the B and B' sites. Ba{sub 2}MgWO{sub 6} and Ba{sub 2}ZnWO{sub 6} exhibit room-temperature luminescence with green and yellow emissions, respectively.