Crystal structures and compressibility of novel iron borides Fe2B7 and Fe B50 synthesized at high pressure and high temperature
Bykova, E.; Gou, H.; Bykov, M.; Hanfland, M.; Dubrovinsky, L.; Dubrovinskaia, N.; Journal of Solid State Chemistry 230 (2015) 102–109; doi:10.1016/j.jssc.2015.06.040

data_1561755
_publ_section_title
;
 Crystal structures and compressibility of novel iron borides Fe2B7 and Fe
 B50 synthesized at high pressure and high temperature
;
_journal_name_full               'Journal of Solid State Chemistry'
_journal_page_first              102
_journal_page_last               109
_journal_paper_doi               10.1016/j.jssc.2015.06.040
_journal_volume                  230
_journal_year                    2015
_chemical_formula_moiety         'B50 Fe1.04'
_chemical_formula_sum            'B50 Fe1.04'
_chemical_formula_weight         598.58
_chemical_name_common            'Iron Boron (1.04/50)'
_chemical_name_systematic        'Iron Boron (1.04/50)'
_space_group_crystal_system      tetragonal
_space_group_IT_number           134
_space_group_name_Hall           '-P 4ac 2bc'
_space_group_name_H-M_alt        'P 42/n n m :2'
_atom_sites_solution_hydrogens   .
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-2014/7
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            1
_cell_length_a                   8.9731(3)
_cell_length_b                   8.9731(3)
_cell_length_c                   5.0587(3)
_cell_measurement_reflns_used    795
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      32.8270
_cell_measurement_theta_min      3.2060
_cell_volume                     407.31(3)
_computing_cell_refinement
;
CrysAlisPro, Agilent Technologies,
Version 1.171.36.28 (release 01-02-2013 CrysAlis171 .NET)
(compiled Feb  1 2013,16:14:44)
;
_computing_data_collection
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CrysAlisPro, Agilent Technologies,
Version 1.171.36.28 (release 01-02-2013 CrysAlis171 .NET)
(compiled Feb  1 2013,16:14:44)
;
_computing_data_reduction
;
CrysAlisPro, Agilent Technologies,
Version 1.171.36.28 (release 01-02-2013 CrysAlis171 .NET)
(compiled Feb  1 2013,16:14:44)
;
_computing_structure_refinement  'SHELXL-2014/7 (Sheldrick, 2014)'
_computing_structure_solution    'SHELXS-2013 (Sheldrick, 2013)'
_diffrn_ambient_temperature      296(2)
_diffrn_detector_area_resol_mean 8.3370
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 0.980
_diffrn_measurement_device_type  'Xcalibur, Sapphire2, large Be window'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0440
_diffrn_reflns_av_unetI/netI     0.0475
_diffrn_reflns_Laue_measured_fraction_full 1.000
_diffrn_reflns_Laue_measured_fraction_max 0.980
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       7
_diffrn_reflns_limit_l_min       -5
_diffrn_reflns_number            1719
_diffrn_reflns_point_group_measured_fraction_full 1.000
_diffrn_reflns_point_group_measured_fraction_max 0.980
_diffrn_reflns_theta_full        25.000
_diffrn_reflns_theta_max         33.706
_diffrn_reflns_theta_min         3.211
_diffrn_source                   'Enhance (Mo) X-ray Source'
_exptl_absorpt_coefficient_mu    0.972
_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_correction_T_min  0.97740
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
CrysAlisPro, Agilent Technologies,
Version 1.171.36.28 (release 01-02-2013 CrysAlis171 .NET)
(compiled Feb  1 2013,16:14:44)
Empirical absorption correction using spherical harmonics,
 implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_colour            black
_exptl_crystal_density_diffrn    2.440
_exptl_crystal_description       prism
_exptl_crystal_F_000             277
_exptl_crystal_size_max          0.110
_exptl_crystal_size_mid          0.100
_exptl_crystal_size_min          0.040
_refine_diff_density_max         0.772
_refine_diff_density_min         -0.288
_refine_diff_density_rms         0.112
_refine_ls_extinction_coef       .
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.154
_refine_ls_hydrogen_treatment    .
_refine_ls_matrix_type           full
_refine_ls_number_parameters     36
_refine_ls_number_reflns         431
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.154
_refine_ls_R_factor_all          0.0617
_refine_ls_R_factor_gt           0.0448
_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^)+(0.0540P)^2^+0.1238P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1076
_refine_ls_wR_factor_ref         0.1151
_reflns_Friedel_coverage         0.000
_reflns_Friedel_fraction_full    .
_reflns_Friedel_fraction_max     .
_reflns_number_gt                344
_reflns_number_total             431
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            Fe1_04B50_300K.cif
_cod_data_source_block           Fe1.04B50
_cod_original_cell_volume        407.31(4)
_cod_original_sg_symbol_H-M      'P 42/n n m'
_cod_database_code               1561755
_shelx_shelxl_version_number     2014/7
_shelx_estimated_absorpt_t_min   0.901
_shelx_estimated_absorpt_t_max   0.962
_shelx_res_checksum              10511
_shelx_hkl_checksum              70277