On the Nature of the Structural and Magnetic Phase Transitions in the Layered Perovskite-Like (CH3NH3)2[Fe(II)Cl4].
Han, Jing; Nishihara, Sadafumi; Inoue, Katsuya; Kurmoo, Mohamedally; Inorganic chemistry 53 (2014) 2068–2075; doi:10.1021/ic402535u

data_4337229
_publ_section_title
;
 On the Nature of the Structural and Magnetic Phase Transitions in the
 Layered Perovskite-Like (CH3NH3)2[Fe(II)Cl4].
;
_journal_issue                   4
_journal_name_full               'Inorganic chemistry'
_journal_page_first              2068
_journal_page_last               2075
_journal_paper_doi               10.1021/ic402535u
_journal_volume                  53
_journal_year                    2014
_chemical_formula_sum            'C0.13 H0.75 Cl0.25 Fe0.06 N0.13'
_chemical_formula_weight         16.36
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           139
_symmetry_space_group_name_Hall  '-I 4 2'
_symmetry_space_group_name_H-M   'I 4/m m m'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            32
_cell_length_a                   5.1130(14)
_cell_length_b                   5.1130(14)
_cell_length_c                   19.278(5)
_cell_measurement_temperature    340(2)
_cell_volume                     504.0(2)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      340(2)
_diffrn_measured_fraction_theta_full 0.983
_diffrn_measured_fraction_theta_max 0.983
_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  0.0250
_diffrn_reflns_av_sigmaI/netI    0.0109
_diffrn_reflns_limit_h_max       6
_diffrn_reflns_limit_h_min       -6
_diffrn_reflns_limit_k_max       6
_diffrn_reflns_limit_k_min       -6
_diffrn_reflns_limit_l_max       25
_diffrn_reflns_limit_l_min       -25
_diffrn_reflns_number            2984
_diffrn_reflns_theta_full        28.83
_diffrn_reflns_theta_max         28.83
_diffrn_reflns_theta_min         2.11
_exptl_absorpt_coefficient_mu    2.489
_exptl_absorpt_correction_T_max  0.9519
_exptl_absorpt_correction_T_min  0.7889
_exptl_crystal_density_diffrn    1.725
_exptl_crystal_density_method    'not measured'
_exptl_crystal_F_000             264
_exptl_crystal_size_max          0.10
_exptl_crystal_size_mid          0.10
_exptl_crystal_size_min          0.02
_refine_diff_density_max         0.237
_refine_diff_density_min         -0.206
_refine_diff_density_rms         0.042
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.228
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     17
_refine_ls_number_reflns         229
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.228
_refine_ls_R_factor_all          0.0154
_refine_ls_R_factor_gt           0.0149
_refine_ls_shift/su_max          0.267
_refine_ls_shift/su_mean         0.023
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0227P)^2^+0.1055P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0422
_refine_ls_wR_factor_ref         0.0424
_reflns_number_gt                223
_reflns_number_total             229
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            D-340k-I4mmm.cif
_cod_data_source_block           D-340K-I4mmm
_cod_original_sg_symbol_H-M      '? I 4/mmm'
_cod_database_code               4337229