Nb4Pd0.5ZSb2 (Z = Cr, Fe, Co, Ni, Si): The First Ordered Quaternary Variants of the W5Si3- Type Structure
Meitian Wang; William C. Sheets; Robert McDonald; Arthur Mar; Inorganic Chemistry 40 (2001) 5199–5205; doi:10.1021/ic010441z

data_4320321
_publ_contact_author_address
; Department of Chemistry
    University of Alberta
    Edmonton, AB
    Canada  T6G 2G2
;
_publ_contact_author_email       arthur.mar@ualberta.ca
_publ_contact_author_fax         '(780) 492-8231'
_publ_contact_author_name        'Arthur Mar'
_publ_contact_author_phone       '(780) 492-5592'
_publ_section_title
;
 Nb4Pd0.5ZSb2 (Z = Cr, Fe, Co, Ni, Si): The First Ordered Quaternary
 Variants of the W5Si3- Type Structure
;
_journal_name_full               'Inorganic Chemistry'
_journal_page_first              5199
_journal_page_last               5205
_journal_paper_doi               10.1021/ic010441z
_journal_volume                  40
_journal_year                    2001
_chemical_formula_moiety         'Cr0.28 Nb4 Pd0.50 Sb2 Si0.72'
_chemical_formula_sum            'Cr0.28 Nb4 Pd0.5 Sb2 Si0.72'
_chemical_formula_weight         703.11
_chemical_name_common
; niobium palladium chromium silicon antimonide

;
_chemical_name_systematic
; niobium palladium chromium silicon antimonide

;
_space_group_IT_number           140
_symmetry_cell_setting           tetragonal
_symmetry_space_group_name_Hall  '-I 4 2c'
_symmetry_space_group_name_H-M   'I 4/m c 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            4
_cell_length_a                   10.4407(3)
_cell_length_b                   10.4407(3)
_cell_length_c                   5.0020(2)
_cell_measurement_reflns_used    3725
_cell_measurement_temperature    295(2)
_cell_measurement_theta_max      32.56
_cell_measurement_theta_min      2.76
_cell_volume                     545.26(3)
_computing_cell_refinement       'Bruker SAINT 5.0'
_computing_data_collection       'Bruker SMART 5.051'
_computing_data_reduction        'Bruker SAINT 5.0'
_computing_molecular_graphics    'ATOMS 5.1'
_computing_publication_material  'Bruker SHELXTL 5.1'
_computing_structure_refinement  'Bruker SHELXTL 5.1'
_computing_structure_solution    'Bruker SHELXTL 5.1'
_diffrn_ambient_temperature      295(2)
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  'Bruker Platform/SMART 1000 CCD'
_diffrn_measurement_method       '\w scan (0.2 deg)'
_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  0.0420
_diffrn_reflns_av_sigmaI/netI    0.0146
_diffrn_reflns_limit_h_max       15
_diffrn_reflns_limit_h_min       -15
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       7
_diffrn_reflns_limit_l_min       -7
_diffrn_reflns_number            3081
_diffrn_reflns_theta_full        32.56
_diffrn_reflns_theta_max         32.56
_diffrn_reflns_theta_min         2.76
_exptl_absorpt_coefficient_mu    20.028
_exptl_absorpt_correction_T_max  0.477
_exptl_absorpt_correction_T_min  0.260
_exptl_absorpt_correction_type   numerical
_exptl_absorpt_process_details   'Bruker SHEXLTL 5.1'
_exptl_crystal_colour            black
_exptl_crystal_density_diffrn    8.564
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needle
_exptl_crystal_F_000             1198
_exptl_crystal_size_max          0.10
_exptl_crystal_size_mid          0.03
_exptl_crystal_size_min          0.03
_refine_diff_density_max         2.249
_refine_diff_density_min         -1.359
_refine_diff_density_rms         0.397
_refine_ls_extinction_coef       0.0045(4)
_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   1.275
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     18
_refine_ls_number_reflns         294
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.273
_refine_ls_R_factor_all          0.0315
_refine_ls_R_factor_gt           0.0312
_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^)+(0.0302P)^2^+23.7359P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0748
_refine_ls_wR_factor_ref         0.0750
_reflns_number_gt                291
_reflns_number_total             294
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ic010441z_2.cif
_cod_data_source_block           NbPdCrSiSb
_cod_depositor_comments
;
The following automatic conversions were performed:

'_exptl_crystal_density_meas' value 'not measured' was changed to '?'
- the value is perceived as not measured.

Automatic conversion script
Id: cif_fix_values 3008 2015-01-20 13:52:24Z robertas 
;
_cod_original_formula_sum        'Cr0.28 Nb4 Pd0.50 Sb2 Si0.72'
_cod_database_code               4320321