TY - JOUR
T1 - Structures of strontium diformate and strontium fumarate. A synchrotron powder diffraction study
AU - Sthl, Kenny
AU - Andersen, Jens E.T.
AU - Shim, Irene
AU - Christgau, Stephan
PY - 2009/8/14
Y1 - 2009/8/14
N2 - The crystal structures of strontium diformate in space groups P2 12121 ( form, 295 K), P412 12 (Β form, 334 and 540 K) and I41/amd ( form, 605 K), and strontium fumarate in space groups Fddd (Β form, 105 K) and I41/amd ( form, 293 K) have been determined from synchrotron X-ray powder diffraction data. Except for the -strontium diformate, all the structures are based on a diamond-like Sr-ion arrangement, as in strontium acetylene dicarboxylate. The formate ions are disordered in the phase owing to steric hindrance. The fumarate ions are disordered over four (α) or two (Β) symmetry-equivalent orientations. -Strontium fumarate crystallizes with a unique 90° carboxylate dihedral angle, and is stable up to 773 K.
AB - The crystal structures of strontium diformate in space groups P2 12121 ( form, 295 K), P412 12 (Β form, 334 and 540 K) and I41/amd ( form, 605 K), and strontium fumarate in space groups Fddd (Β form, 105 K) and I41/amd ( form, 293 K) have been determined from synchrotron X-ray powder diffraction data. Except for the -strontium diformate, all the structures are based on a diamond-like Sr-ion arrangement, as in strontium acetylene dicarboxylate. The formate ions are disordered in the phase owing to steric hindrance. The fumarate ions are disordered over four (α) or two (Β) symmetry-equivalent orientations. -Strontium fumarate crystallizes with a unique 90° carboxylate dihedral angle, and is stable up to 773 K.
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U2 - 10.1107/S0108768109023489
DO - 10.1107/S0108768109023489
M3 - Article
C2 - 19617684
AN - SCOPUS:68349157294
SN - 0108-7681
VL - 65
SP - 481
EP - 487
JO - Acta Crystallographica Section B: Structural Science
JF - Acta Crystallographica Section B: Structural Science
IS - 4
ER -