Acta Crystallographica Section B

Volume 65, Part 1 (February 2009)

research papers

Acta Cryst. (2009). B65, 59-67 [ doi:10.1107/S0108768108042298 ]

Following an isosymmetric phase transition by changes in bond lengths and anisotropic displacement parameters: the case of meta-carboxyphenylammonium phosphite

E.-E. Bendeif, C. Lecomte and S. Dahaoui

Abstract: Crystal structure studies in the 100-345 K temperature range were performed to relate the molecular structure changes of meta-carboxyphenylammonium phosphite (m-CPAMP) to its first-order phase transition at T_c = 246 (2) K. Thermal displacement parameters and most bond distances show an abrupt jump at the transition. Such a structural change is related to collective effects leading to competition between intra- and intermolecular interactions.

Keywords: isosymmetric phase transition; molecular structure changes; ferroelectric materials.


	Structure factor file (CIF format) (132.3 kbytes) [ doi:10.1107/S0108768108042298/bk5076100Ksup2.fcf ] Contains datablock 100K

	Structure factor file (CIF format) (131.4 kbytes) [ doi:10.1107/S0108768108042298/bk5076130Ksup3.fcf ] Contains datablock 130K

	Structure factor file (CIF format) (131.7 kbytes) [ doi:10.1107/S0108768108042298/bk5076170Ksup4.fcf ] Contains datablock 170K

	Structure factor file (CIF format) (132.1 kbytes) [ doi:10.1107/S0108768108042298/bk5076210Ksup5.fcf ] Contains datablock 210K

	Structure factor file (CIF format) (133.0 kbytes) [ doi:10.1107/S0108768108042298/bk5076235Ksup6.fcf ] Contains datablock 235K

	Structure factor file (CIF format) (135.3 kbytes) [ doi:10.1107/S0108768108042298/bk5076255Ksup7.fcf ] Contains datablock 255K

	Structure factor file (CIF format) (135.0 kbytes) [ doi:10.1107/S0108768108042298/bk5076293Ksup8.fcf ] Contains datablock 293K

	Structure factor file (CIF format) (135.4 kbytes) [ doi:10.1107/S0108768108042298/bk5076320Ksup9.fcf ] Contains datablock 320K

	Structure factor file (CIF format) (135.4 kbytes) [ doi:10.1107/S0108768108042298/bk5076345Ksup10.fcf ] Contains datablock 345K

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