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1 results

  • Structure determination of anhydrous acid strontium oxalate by conventional X-ray powder diffraction

  • G. Vanhoyland, M. K. Van Bael, J. Mullens, L. C. Van Poucke
  • Journal:
    Powder Diffraction / Volume 16 / Issue 4 / December 2001
    Published online by Cambridge University Press:
    05 March 2012, pp. 224-226

  • The anhydrous acid strontium oxalate Sr(HC2O4)⋅½(C2O4) was obtained by thermal decomposition of the hydrated acid strontium oxalate Sr(HC2O4)⋅½(C2O4)⋅H2O. This non-hygroscopic compound crystallizes in the space group P 21/c (No. 14) with unit cell parameters: a=0.796 61(7) nm, b=0.9205(1) nm, c=0.731 98(8) nm, and β=102.104(8)°. Final refinement of the X-ray powder data yielded RB=3.2% and Rwp=11.1% (background-corrected data). In this structure, Sr is eight-fold coordinated by O. These polyhedra are connected together by edge-sharing to form two-dimensional (2D) layers along the bc-plane, which means that there is an increased dimensionality from 1D to 2D with decreasing water content of the acid oxalates.