Coexistence of Magnetic and Electric Orderings in the Metal-Formate Frameworks of [NH4][M(HCOO)3]
Guan-Cheng Xu; Wen Zhang; Xiao-Ming Ma; Yi-Hong Chen; Li Zhang; Hong-Ling Cai; Zhe-Ming Wang; Ren-Gen Xiong; Song Gao; Journal of the American Chemical Society 133 (2011) 14948–14951; doi:10.1021/ja206891q

data_4106846
_publ_section_title
;
 Coexistence of Magnetic and Electric Orderings in the Metal-Formate
 Frameworks of [NH4][M(HCOO)3]
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              14948
_journal_page_last               14951
_journal_paper_doi               10.1021/ja206891q
_journal_volume                  133
_journal_year                    2011
_chemical_formula_sum            'C3 H7 Fe N O6'
_chemical_formula_weight         208.95
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           173
_symmetry_cell_setting           hexagonal
_symmetry_space_group_name_Hall  'P 6c'
_symmetry_space_group_name_H-M   'P 63'
_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                120.00
_cell_formula_units_Z            6
_cell_length_a                   12.6167(3)
_cell_length_b                   12.6167(3)
_cell_length_c                   8.3647(2)
_cell_measurement_reflns_used    12396
_cell_measurement_temperature    110
_cell_measurement_theta_max      27.485
_cell_measurement_theta_min      3.395
_cell_volume                     1153.11(5)
_computing_cell_refinement       'HKL Scalepack (Otwinowski & Minor, 1997)'
_computing_data_collection       'KappaCCD (Nonius B. V., 1998)'
_computing_data_reduction
'HKL Denzo (Otwinowski & Minor, 1997) & maXus (Mackay et al., 1998)'
_computing_molecular_graphics    'Bruker SHELXTL V5.1 (Sheldrick, 1998)'
_computing_publication_material  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      110
_diffrn_detector_area_resol_mean 9
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  'NONIUS KappaCCD'
_diffrn_measurement_method       CCD
_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  0.0553
_diffrn_reflns_av_sigmaI/netI    0.0238
_diffrn_reflns_limit_h_max       16
_diffrn_reflns_limit_h_min       -16
_diffrn_reflns_limit_k_max       16
_diffrn_reflns_limit_k_min       -16
_diffrn_reflns_limit_l_max       10
_diffrn_reflns_limit_l_min       -10
_diffrn_reflns_number            24299
_diffrn_reflns_theta_full        27.47
_diffrn_reflns_theta_max         27.47
_diffrn_reflns_theta_min         3.73
_diffrn_standards_decay_%        0
_exptl_absorpt_coefficient_mu    1.948
_exptl_absorpt_correction_T_max  0.686
_exptl_absorpt_correction_T_min  0.569
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
multi-scan from symmetry-related measurements 
 Sortav (Blessing 1995, 1997)
;
_exptl_crystal_colour            'pale green'
_exptl_crystal_density_diffrn    1.805
_exptl_crystal_description       'hexagonal block'
_exptl_crystal_F_000             636
_exptl_crystal_size_max          0.32
_exptl_crystal_size_mid          0.32
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.441
_refine_diff_density_min         -0.431
_refine_diff_density_rms         0.060
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.00
_refine_ls_extinction_coef       0.0081(12)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.022
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     115
_refine_ls_number_reflns         1751
_refine_ls_number_restraints     10
_refine_ls_restrained_S_all      1.024
_refine_ls_R_factor_all          0.0444
_refine_ls_R_factor_gt           0.0287
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0489P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0799
_refine_ls_wR_factor_ref         0.0852
_reflns_number_gt                1289
_reflns_number_total             1751
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja206891q_si_001_4.cif
_cod_data_source_block           2Fe-110K
_cod_database_code               4106846