Pressure dependence of spin canting in ammonium metal formate antiferromagnets.
Collings, Ines E.; Manna, Rudra Sekhar; Tsirlin, Alexander A.; Bykov, Maxim; Bykova, Elena; Hanfland, Michael; Gegenwart, Philipp; van Smaalen, Sander; Dubrovinsky, Leonid; Dubrovinskaia, Natalia; Physical chemistry chemical physics : PCCP 20 (2018) 24465–24476; doi:10.1039/c8cp03761b

data_7231415
_publ_section_title
;
 Pressure dependence of spin canting in ammonium metal formate
 antiferromagnets.
;
_journal_issue                   37
_journal_name_full               'Physical chemistry chemical physics : PCCP'
_journal_page_first              24465
_journal_page_last               24476
_journal_paper_doi               10.1039/c8cp03761b
_journal_volume                  20
_journal_year                    2018
_chemical_formula_moiety         'C3 H3 Ni O6, N H4'
_chemical_formula_sum            'C3 H7 N Ni O6'
_chemical_formula_weight         211.81
_space_group_crystal_system      hexagonal
_space_group_IT_number           182
_space_group_name_Hall           'P 6c 2c'
_space_group_name_H-M_alt        'P 63 2 2'
_symmetry_space_group_name_Hall  'P 6c 2c'
_symmetry_space_group_name_H-M   'P 63 2 2'
_atom_sites_solution_hydrogens   mixed
_audit_creation_method           SHELXL-2016/6
_audit_update_record
;
2018-08-09 deposited with the CCDC.
2018-08-22 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                120
_cell_formula_units_Z            2
_cell_length_a                   7.1831(2)
_cell_length_b                   7.1831(2)
_cell_length_c                   8.0511(2)
_cell_measurement_reflns_used    412
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      17.0000
_cell_measurement_theta_min      1.8950
_cell_volume                     359.757(17)
_computing_cell_refinement       'CrysAlisPro (Agilent Technologies, 2013)'
_computing_data_reduction        'CrysAlisPro (Agilent Technologies, 2013)'
_computing_molecular_graphics    'SHELXLE-2011 (Huebschle, 2011)'
_computing_structure_refinement  'SHELXL-2016/6 (Sheldrick, 2016)'
_computing_structure_solution    'SHELXT-2015 (Sheldrick, 2015)'
_diffrn_ambient_pressure         '0.82 GPa'
_diffrn_ambient_temperature      293(2)
_diffrn_detector_area_resol_mean 7
_diffrn_measured_fraction_theta_full 0.933
_diffrn_measured_fraction_theta_max 0.767
_diffrn_measurement_device_type  'ID15B beamline, ESRF'
_diffrn_measurement_method       'omega scans'
_diffrn_radiation_type           synchrotron
_diffrn_radiation_wavelength     0.41128
_diffrn_reflns_av_R_equivalents  0.0216
_diffrn_reflns_av_unetI/netI     0.0281
_diffrn_reflns_Laue_measured_fraction_full 0.933
_diffrn_reflns_Laue_measured_fraction_max 0.767
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -6
_diffrn_reflns_limit_l_max       12
_diffrn_reflns_limit_l_min       -10
_diffrn_reflns_number            1045
_diffrn_reflns_point_group_measured_fraction_full 0.951
_diffrn_reflns_point_group_measured_fraction_max 0.709
_diffrn_reflns_theta_full        14.286
_diffrn_reflns_theta_max         19.558
_diffrn_reflns_theta_min         1.894
_diffrn_source                   synchrotron
_exptl_absorpt_coefficient_mu    0.598
_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_correction_T_min  0.50830
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
CrysAlisPro 1.171.38.43 (Rigaku Oxford Diffraction, 2015)
Empirical absorption correction using spherical harmonics,
 implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_colour            green
_exptl_crystal_density_diffrn    1.955
_exptl_crystal_description       'hexagonal bipyramid'
_exptl_crystal_F_000             216
_exptl_crystal_size_max          0.075
_exptl_crystal_size_mid          0.060
_exptl_crystal_size_min          0.050
_refine_diff_density_max         0.280
_refine_diff_density_min         -0.394
_refine_diff_density_rms         0.068
_refine_ls_abs_structure_details
;
 Flack x determined using 90 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   -0.01(5)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.253
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     22
_refine_ls_number_reflns         395
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.252
_refine_ls_R_factor_all          0.0379
_refine_ls_R_factor_gt           0.0315
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0147P)^2^+0.2027P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0610
_refine_ls_wR_factor_ref         0.0668
_reflns_Friedel_coverage         0.381
_reflns_Friedel_fraction_full    1.000
_reflns_Friedel_fraction_max     0.592
_reflns_number_gt                351
_reflns_number_total             395
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c8cp03761b2.cif
_cod_data_source_block           ANiF_c2_p04
_cod_depositor_comments
'Adding full bibliography for 7231402--7231432.cif.'
_cod_original_cell_volume        359.76(2)
_cod_database_code               7231415
_shelx_shelxl_version_number     2016/6
_shelx_res_checksum              30031