Following an isosymmetric phase transition by changes in bond lengths and anisotropic displacement parameters: the case of <i>meta</i>-carboxyphenylammonium phosphite
Bendeif, El-Eulmi; Lecomte, Claude; Dahaoui, Slimane; Acta Crystallographica Section B 65 (2009) 59–67; doi:10.1107/S0108768108042298

data_2104279
_publ_section_title
;
 Following an isosymmetric phase transition by changes in bond lengths
 and anisotropic displacement parameters: the case of
 <i>meta</i>-carboxyphenylammonium phosphite
;
_journal_issue                   1
_journal_name_full               'Acta Crystallographica Section B'
_journal_page_first              59
_journal_page_last               67
_journal_paper_doi               10.1107/S0108768108042298
_journal_volume                  65
_journal_year                    2009
_chemical_formula_iupac          '(C7 H8 N O2) +,(H2 P O3) -'
_chemical_formula_moiety         'C7 H8 N O2, H2 O3 P'
_chemical_formula_structural     'C7 H10 N O5 P'
_chemical_formula_sum            'C7 H10 N O5 P'
_chemical_formula_weight         219.13
_chemical_name_common
'm-carboxyphenyl ammonium monohydrogenphosphite'
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_cell_angle_alpha                90.00
_cell_angle_beta                 100.981(6)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   12.2487(9)
_cell_length_b                   12.3265(8)
_cell_length_c                   6.4290(5)
_cell_measurement_reflns_used    23700
_cell_measurement_temperature    235(2)
_cell_measurement_theta_max      30.00
_cell_measurement_theta_min      3.41
_cell_volume                     952.90(12)
_computing_cell_refinement       'CrysAlis RED (Oxford Diffraction, 2006)'
_computing_data_collection       'CrysAlis CCD (Oxford Diffraction, 2006)'
_computing_data_reduction        'CrysAlis RED (Oxford Diffraction, 2006)'
_computing_molecular_graphics    'ORTEPIII (Burnett,M. N & Johnson, C. K, 1996)'
_computing_publication_material  'WinGX publication routines (Farrugia, 1999)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      235(2)
_diffrn_measured_fraction_theta_full 0.7035
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device       Xcalibur-Saphire2
_diffrn_measurement_method       \w
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0333
_diffrn_reflns_av_sigmaI/netI    0.0184
_diffrn_reflns_limit_h_max       17
_diffrn_reflns_limit_h_min       -17
_diffrn_reflns_limit_k_max       17
_diffrn_reflns_limit_k_min       -17
_diffrn_reflns_limit_l_max       8
_diffrn_reflns_limit_l_min       -9
_diffrn_reflns_number            23700
_diffrn_reflns_theta_max         30.00
_diffrn_reflns_theta_min         3.39
_exptl_absorpt_coefficient_mu    0.285
_exptl_absorpt_correction_T_max  0.940
_exptl_absorpt_correction_T_min  0.889
_exptl_absorpt_correction_type   integration
_exptl_absorpt_process_details   'Absorb, (DeTitta, 1985)'
_exptl_crystal_colour            brown
_exptl_crystal_density_diffrn    1.527
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             456
_exptl_crystal_size_max          0.40
_exptl_crystal_size_mid          0.40
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.464
_refine_diff_density_min         -0.267
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.096
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     167
_refine_ls_number_reflns         2765
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.096
_refine_ls_R_factor_all          0.0461
_refine_ls_R_factor_gt           0.0385
_refine_ls_shift/su_max          0.029
_refine_ls_shift/su_mean         0.003
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0777P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1074
_refine_ls_wR_factor_ref         0.1128
_reflns_number_gt                2311
_reflns_number_total             2765
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            bk5076.cif
_cod_data_source_block           m-CPAMP_235K
_cod_database_code               2104279