Tetragonal98% deuterated potassium dihydrogen phosphate (98%DKDP) crystals were grown rapidly from synthetic higher deuterium content DKDP solution by using point seeds under high supersaturation at different temperatures ranging from 38.3^oC to 51.0^oC. It is found that the metastable region of DKDP solution is uncertain and DKDP crystal can start to grow from higher temperature. For comparison, monoclinic 98%DKDP crystals were also grown from the same solution.  Surface morphologies of tetragonal 98%DKDP crystals grown under different temperatures and monoclinic 98%DKDP crystals were investigated by using AFM technique.  The different growth habits of Tetragonal and monoclinic 98%DKDP crystals were studied according to their different crystal structures by using bond valence model.

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1. Thermal properties of a series of partially deuterated ADP crystals