A new potassium rare earth oxyborate K2La2(BO3)2O

A series of potassium rare earth oxyborates, K2RE2(BO3)2O (RE = La, Nd, Sm and Eu), have been synthesized. Single crystal of the first member of the series, K2La2(BO3)2O, has been grown by the flux method. Its structure, determined by single crystal X-ray diffraction, shows that it belongs to the monoclinic system, space group P21/c with unit cell parameters of a = 11.422(2) Å, b = 6.6803(13) Å, c = 10.813(2) Å, β = 17.23(3)° and Z = 4. Optical transmission spectrum shows that the K2La2(BO3)2O crystal is highly transparent from 215 nm to 2750 nm.

Figure optionsDownload as PowerPoint slide