We specialize in producing KD*P(DKDP) electro-optical crystals with high deuterium,high quality and large caliber.In virtue of our novel technique of crystal growth ,the stability of crystal quality and yield is insured.We provide any size of semi-finished KD*P crystals on request .And our products are recognized by the European and American markets. KD*P crystal is in stock. You are welcome to contact us for more information. Basic parameter: Chemical Formula KD2P Curie temperature 222K Symmetry 42m Density 2.355g/cm3 Absorption 0.005/cm Extinction ratio 1:10000 Deuterium ratio 98.05%--99.05% Transmission band 200-1600nm Non-linear coefficient d36=0.40pm/v Longitudinal half-wave voltage 2.98KV(I=546nm) Electric resistance >2x109 Mcm Electric-optical coefficient r41=8.8pm/v,r63=25pm/v . Specifications: Wavefront distortion: less than l/8 633nm Dimension tolerance: (Wf+ 0.1mm) x (Hf+0.1mm) x (L + 0.2mm/-0.1mm) Clear aperture: > 90% central area Flatness: l/8 633nm Scratch/Dig code: 10/5 to MIL-O-13830A Parallelism: better than 20 arc seconds Perpendicularity: 5 arc minutes Angle tolerance: qD