Growth of CdWO4 crystals by the low thermal gradient Czochralski technique and the properties of a (010) cleaved surface

•Large CdWO4 crystals have been grown by Low Thermal Gradient Czochralski technique (LTG Cz).•Large area atomically flat CdWO4(010) substrates have been prepared by cleavage.•Structural properties of cleaved CdWO4(010) surface have been evaluated by RHEED and AFM.

The high-quality CdWO4 crystal of 80–90 mm in diameter and 180–200 mm long has been grown by Low Thermal Gradient Czochralski technique (LTG Cz). Large area atomically flat CdWO4(010) substrates have been prepared by cleavage. The CdWO4(010) surface is stable in the air up to 600 °C. At higher temperatures, the precipitation of WO3 and W19O55 oxides has been detected by RHEED.