Growth and properties of NaEr(WO4)2 crystals

Tetragonal scheelite-like single crystals NaEr(Wo(4))(2) (NEW) have been grown by using RF-heating Czochralski (CZ) method for the first time. X-ray powder diffraction experiments show that the crystal has the same structure as NaY(WO4)(2) (NYW) and its unit cell parameters were calculated as a = b = 0.5199nm, c = 1.1265 nm, and V = 0.3045 nm(3). Differential scanning calorimetry shows that the NEW crystal melts at 1188.5 degreesC, which is lower than that of NYW crystal. Optical properties measurements show that NEW has intensive green luminescence emission at 551 nm pumped by LD with a wavelength of 974 nm, which is a potential for green laser emission running through up-conversion. (C) 2001 Published by Elsevier Science B.V.