Crystal Growth of a New Series of Complex Niobates, LnKNaNbO5 (Ln = La, Pr, Nd, Sm, Eu, Gd, and Tb): Structural Properties and Photoluminescence
Single crystals of LnKNaNbO5 (Ln = La, Pr, Nd, Sm, Eu, Gd, Tb) were grown out of a reactive high temperature hydroxide melt. The structures were solved by single crystal X-ray diffraction. All compounds of the series LnKNaNbO5 crystallize in the space group P4/nmm. The niobium is located in a rare square pyramidal coordination environment in this layered structure. EuKNaNbO5, GdKNaNbO5, and TbKNaNbO5 exhibit room temperature photoluminescence with bright orange-red, pink-purple, and green emissions, respectively. Unlike in many oxide structures, the photoluminescence is not quenched, although the rare earth elements fully occupy a position in the crystal structure.
Digital Object Identifier (DOI)
Published in Chemistry of Materials, Volume 21, Issue 9, 2009, pages 1955-1961.
© Chemistry of Materials 2009, American Chemical Society.
Roof, I., Jagau, T.-C., Zeier, W., Smith, M., & zur Loye, H.-C. (2009). Crystal Growth of a New Series of Complex Niobates, LnKNaNbO5 (Ln = La, Pr, Nd, Sm, Eu, Gd, and Tb): Structural Properties and Photoluminescence. Chemistry of Materials, 21(9), 1955–1961. https://doi.org/10.1021/cm9003245