Thermal decomposition of Leightonite, K2Ca2Cu(SO4)4·2H2O

  • Jinhua Wang (王锦华)
  • Shouxing Wang
  • Xinya Yang
  • Wen Chen
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Abstract

The thermal decomposition of Leightonite, K2Ca2Cu (SO4)4·2H2O, was studied by thermal gravimetric analysis(TGA), differential thermal analysis(DTA), X-ray diffraction(XRD), etc. The results show that the Leightonite is dehydrated around 170 °C to 390 °C and transformed to be new intermediate (K-Cu-SO4) sulphate salt with bright-green color. Moreover, the chemical structure changes during the thernal decomposition process was describled in detail. And the as-resulting phases are demonstrated to be K2Ca2(SO4)3, K2SO4, CaSO4, and Cu2O.

Key words

differential thermal analysis sulphate double salt leightonite thermal decomposition 
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Copyright information

© Wuhan University of Technology and Springer-Verlag GmbH 2008

Authors and Affiliations

  • Jinhua Wang (王锦华)
    • 1
  • Shouxing Wang
    • 1
  • Xinya Yang
    • 1
  • Wen Chen
    • 1
  1. 1.School of Materials Science and EngineeringWuhan University of TechnologyWuhanChina

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