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

✍ Scribed by Daniel E. Bugaris; Jason P. Hodges; Ashfia Huq; Hans-Conrad zur Loye

• Publisher: Elsevier Science
• Year: 2011
• Tongue: English
• Weight: 753 KB
• Volume: 184
• Category: Article
• ISSN: 0022-4596
• DOI: 10.1016/j.jssc.2011.06.015

✦ Synopsis

Single crystals of the tungstates Ba 2 MgWO 6 and Ba 2 ZnWO 6 have been grown for the first time. The crystals were prepared with molten potassium carbonate acting as a flux. According to the singlecrystal X-ray diffraction structure determination, the compounds crystallize in space group Fm3 ¯m of the cubic system with a double perovskite structure, A 2 BB 0 O 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 2 þ and W 6 þ cations are fully ordered on the B and B 0 sites. Ba 2 MgWO 6 and Ba 2 ZnWO 6 exhibit room-temperature luminescence with green and yellow emissions, respectively.