Hydroflux synthesis and crystal structure of new lanthanide tungstate oxyhydroxides

• Na5Ln(OH)6WO4 (Ln = Er, Tm, Yb) have been synthesized and characterized.
• Crystals were grown in a hydroflux.
• Low temperature synthetic route to synthesize oxyhydroxides is presented.

Single crystals of Na5Ln(OH)6WO4 where Ln = Er, Tm, and Yb were grown out of a NaOH hydroflux. The crystals were characterized by single crystal X-ray diffraction and were found to crystallize in the monoclinic space group I2/a. The lattice parameter ranges for the three structures are a = 11.2024(7) Å–11.2412(6) Å, b = 16.1850(10) Å–16.2220(10) Å, and c = 11.9913(7) Å–12.0323(7) Å while the β angle range is 101.999(2)°–102.025(2)°.

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