Hostname: page-component-586b7cd67f-r5fsc Total loading time: 0 Render date: 2024-11-26T22:03:50.618Z Has data issue: false hasContentIssue false
  • English
  • Français

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]
Get access Rights & Permissions [Opens in a new window]

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

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Altomare, A., Burla, M. C., Cascarano, G., Giacovazzo, C., Guagliardi, A., Moliterni, A. G. G., and Polidori, G. (1995). “Extra: a Program for extracting Structure-Factor Amplitudes from Powder Diffraction Data,” J. Appl. Crystallogr. JACGAR 28, 842–846. acr, JACGAR CrossRefGoogle Scholar
Brandenburg, K. (2001). (Crystal Impact GbR.), “DIAMOND: Visual Crystal Structure Information System” version 2.1c.Google Scholar
Christensen, A. N., and Hazell, R. G. (1998). “Thermal analysis and crystal structure of tetragonal strontium oxalate dihydrate and of triclinic strontium oxalate hydrate,” Acta Chem. Scand. ACHSE7 52, 508–512. act, ACHSE7 CrossRefGoogle Scholar
Gonzales-Platas, J., and Rodriguez-Carvajal, J. (2001). “GFOURIER a windows program for Fourier maps in crystallography,” available at URL http://www- llb.cea.fr/fullweb/others/newfour.htm version 1.12.Google Scholar
Knaepen, E., Mullens, J., Yperman, J., and Van Poucke, L. C. (1996). “Preparation and thermal decomposition of various forms of strontium oxalate,” Thermochim. Acta THACAS 284, 213–227. tha, THACAS CrossRefGoogle Scholar
Le Bail, A. (2001). “Structure Determination from Powder Diffraction–Database,” available at URL http://www.cristal.org/iniref.htmlGoogle Scholar
Price, D. J., Powell, A. K., and Wood, P. T. (1999). “Hydrothermal crystallization and X-ray structure of anhydrous strontium oxalate,” Polyhedron PLYHDE 18, 2499–2503. ply, PLYHDE CrossRefGoogle Scholar
Rodriguez-Carvajal, J. (1990). “FULLPROF: a program for Rietveld refinement and pattern matching analysis,” Abstracts of the satellite meeting on powder diffraction of the XVth congress of the International Union of Crystallography (Toulouse), p. 127.Google Scholar
Vanhoyland, G., Boure´e, F., Van Bael, M. K., Mullens, J., and Van Poucke, L. C. (2001). “Structure determination and refinement of acid strontium oxalate by X-ray and neutron powder diffraction,” J. Solid State Chem. (in press).CrossRefGoogle Scholar
Werner, P. E., Eriksson, L., and Westdahl, M. (1985). “TREOR, a semi- exhaustive trial-and-error powder indexing program for all symmetries,” J. Appl. Crystallogr. JACGAR 18, 367–370. acr, JACGAR CrossRefGoogle Scholar
Werner, P. E. (1969). “PIRUM: a Fortran program for least-squares refinement of crystal-structure cell dimensions” Version 921204, Ark. Kemi ARKEAD 31, 513–516. arz, ARKEAD Google Scholar