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.
|Number of pages||7|
|Journal||Acta Crystallographica Section B: Structural Science|
|Publication status||Published - Aug 14 2009|
All Science Journal Classification (ASJC) codes
- Biochemistry, Genetics and Molecular Biology(all)