Crystal Growth and Characterization of the Rare Earth Fluoride Carbonates NaLnCO3F2 (Ln = Eu–Lu)

A series of rare-earth fluoride carbonates with the general formula NaLnCO3F2 (Ln = Eu–Lu) was synthesized using mild hydrothermal conditions and characterized by single-crystal X-ray diffraction. All nine compounds are isostructural and crystallize in the orthorhombic space group Pnma. The pristine quality of single crystals resulted in high-precision crystal structure solutions. The thermal, magnetic, and optical properties were characterized by thermogravimetric analysis, magnetic susceptibility, and single-crystal photoluminescence emission spectroscopy.