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Science in China Series E: Technological Sciences

, Volume 41, Issue 6, pp 586–591 | Cite as

Growth units and forming mechanism of KDP crystals

  • Weizhuo Zhong
  • Xiling Yu
  • Haosu Luo
  • Zhenxiang Cheng
  • Sukun Hua
Article

Abstract

From the view of crystal chemistry, the growth units and forming mechanism of KDP crystals were investigated. The thickness of boundary layers changing with lattice faces was studied byin-situ observation with Raman spectra, where the solution structure during crystal growth could be well observed. It was found that the solution structure at the boundary layer is similar to that of the crystal, so that the growth units are proposed as [H2PO4]. The difference of growth rates of lattice faces is determined by the combination of growth units, which is mainly dominated by the angular orientation of K−O and H−O bonds. Consequently the reason about the difference of growth rates of lattice faces and the influence of pH value on the crystal morphology can be well elucidated.

Keywords

growth unit anionic coordination polyhedron boundary layer supersaturation 

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Copyright information

© Science in China Press 1998

Authors and Affiliations

  • Weizhuo Zhong
    • 1
  • Xiling Yu
    • 2
  • Haosu Luo
    • 1
  • Zhenxiang Cheng
    • 2
  • Sukun Hua
    • 1
  1. 1.Shanghai Institute of CeramicsChinese Academy of SciencesShanghaiChina
  2. 2.Institute of Crystal MaterialsShandong UniversityJinanChina

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