For the first time Na2Mo2O7 crystals were grown by Czochralski technique in low-thermal-gradient conditions (LTG Cz), which allowed obtaining crystals of record size (100 (D) x45 (L) mm(3)) and optical quality. Influence of growth rate and seed direction on crystal morphology was studied, optimal growth conditions were determined. Three cleavage planes: (0 1 0), (0 0 1) and (0 2 1), were detected. Different characterizations of Na2Mo2O7 crystal samples, such as: transparency, photoluminescence, thermostimulated luminescence and Raman spectra were studied.