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

Published online by Cambridge University Press:  05 March 2012

G. Vanhoyland ,
M. K. Van Bael ,
J. Mullens  and
L. C. Van Poucke
G. Vanhoyland*
Affiliation:
Laboratory of Inorganic and Physical Chemistry, IMO, Limburgs Universitair Centrum, 3590 Diepenbeek, Belgium
M. K. Van Bael
Affiliation:
Laboratory of Inorganic and Physical Chemistry, IMO, Limburgs Universitair Centrum, 3590 Diepenbeek, Belgium
J. Mullens
Affiliation:
Laboratory of Inorganic and Physical Chemistry, IMO, Limburgs Universitair Centrum, 3590 Diepenbeek, Belgium
L. C. Van Poucke
Affiliation:
Laboratory of Inorganic and Physical Chemistry, IMO, Limburgs Universitair Centrum, 3590 Diepenbeek, Belgium
*
a)Author to whom correspondence should be addressed. Electronic mail: [email protected]
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Abstract

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.

Keywords

conventional powder XRDSroxalatestructure determinationRietveld
Type
New Diffraction Data
Information
Powder Diffraction , Volume 16 , Issue 4 , December 2001 , pp. 224 - 226
Copyright
Copyright © Cambridge University Press 2001

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