Diverse Polyanions Based on MnBi4 and MnSb4 Tetrahedra: Polymorphism, Structure, and Bonding in Ca21Mn4Bi18 and Ca21Mn4Sb18
Sheng-qing Xia; Svilen Bobev; Inorganic Chemistry 46 (2007) 874–883; doi:10.1021/ic061958j

data_4307485
_publ_section_title
;
Diverse Polyanions Based on MnBi4 and MnSb4 Tetrahedra: Polymorphism,
Structure, and Bonding in Ca21Mn4Bi18 and Ca21Mn4Sb18
;
_journal_name_full               'Inorganic Chemistry'
_journal_page_first              874
_journal_page_last               883
_journal_paper_doi               10.1021/ic061958j
_journal_volume                  46
_journal_year                    2007
_chemical_formula_moiety         'Bi18 Ca21 Mn4'
_chemical_formula_sum            'Bi18 Ca21 Mn4'
_chemical_formula_weight         4823.08
_space_group_IT_number           15
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/c 1'
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 93.253(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   17.470(2)
_cell_length_b                   17.392(2)
_cell_length_c                   17.208(2)
_cell_measurement_reflns_used    16783
_cell_measurement_temperature    120(2)
_cell_measurement_theta_max      26.37
_cell_measurement_theta_min      1.65
_cell_volume                     5220.0(10)
_computing_cell_refinement       'SAINT (Bruker, 2002)'
_computing_data_collection       'SMART (Bruker, 2002)'
_computing_data_reduction        SAINT
_computing_molecular_graphics    'XP in SHELXTL'
_computing_publication_material  SHELXL-97
_computing_structure_refinement  'SHELXTL (Sheldrick, 2001)'
_computing_structure_solution    'SHELXTL (Sheldrick, 2001)'
_diffrn_ambient_temperature      120(2)
_diffrn_detector_area_resol_mean 8.3
_diffrn_measured_fraction_theta_full 0.990
_diffrn_measured_fraction_theta_max 0.990
_diffrn_measurement_device_type  'Bruker SmartAPEX'
_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  0.0511
_diffrn_reflns_av_sigmaI/netI    0.0587
_diffrn_reflns_limit_h_max       21
_diffrn_reflns_limit_h_min       -21
_diffrn_reflns_limit_k_max       19
_diffrn_reflns_limit_k_min       -21
_diffrn_reflns_limit_l_max       21
_diffrn_reflns_limit_l_min       -21
_diffrn_reflns_number            16783
_diffrn_reflns_theta_full        26.37
_diffrn_reflns_theta_max         26.37
_diffrn_reflns_theta_min         1.65
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    63.416
_exptl_absorpt_correction_T_max  0.0806
_exptl_absorpt_correction_T_min  0.0526
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Sheldrick, 2003)'
_exptl_crystal_colour            black
_exptl_crystal_density_diffrn    6.137
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       irregular
_exptl_crystal_F_000             8056
_exptl_crystal_size_max          0.11
_exptl_crystal_size_mid          0.09
_exptl_crystal_size_min          0.08
_refine_diff_density_max         3.723
_refine_diff_density_min         -2.918
_refine_diff_density_rms         0.592
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.033
_refine_ls_matrix_type           full
_refine_ls_number_parameters     197
_refine_ls_number_reflns         5295
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.033
_refine_ls_R_factor_all          0.0556
_refine_ls_R_factor_gt           0.0405
_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^)+(0.0381P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0840
_refine_ls_wR_factor_ref         0.0894
_reflns_number_gt                4275
_reflns_number_total             5295
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ic061958jsi20061012_053314_1.cif
_cod_data_source_block           Ca21Mn4Bi18
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to '/home/saulius/struct/CIF-dictionaries/cif_core.dic'
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_enum 1527 2010-12-29 10:47:43Z saulius 
;
_cod_original_cell_volume        5219.9(11)
_cod_original_sg_symbol_H-M      'C 2/c '
_cod_database_code               4307485