Polyclusters and Substitution Effects in the Na-Au-Ga System: Remarkable Sodium Bonding Characteristics in Polar Intermetallics
Volodymyr Smetana; Gordon J. Miller; John D. Corbett; Inorganic Chemistry 52 (2013) 12502–12510; doi:10.1021/ic401580y

data_4336564
_publ_section_title
;
 Polyclusters and Substitution Effects in the Na-Au-Ga System: Remarkable
 Sodium Bonding Characteristics in Polar Intermetallics
;
_journal_name_full               'Inorganic Chemistry'
_journal_page_first              12502
_journal_page_last               12510
_journal_paper_doi               10.1021/ic401580y
_journal_volume                  52
_journal_year                    2013
_chemical_formula_sum            'Au0.18 Ga1.82 Na'
_chemical_formula_weight         185.30
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           191
_symmetry_cell_setting           hexagonal
_symmetry_space_group_name_Hall  '-P 6 2'
_symmetry_space_group_name_H-M   'P 6/m m m'
_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            30
_cell_length_a                   15.181(2)
_cell_length_b                   15.181(2)
_cell_length_c                   9.1290(18)
_cell_measurement_reflns_used    8000
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      28.52
_cell_measurement_theta_min      1.55
_cell_volume                     1822.0(5)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.982
_diffrn_measured_fraction_theta_max 0.982
_diffrn_measurement_device_type  'Bruker CCD'
_diffrn_measurement_method       w-scan
_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  0.0948
_diffrn_reflns_av_sigmaI/netI    0.0431
_diffrn_reflns_limit_h_max       19
_diffrn_reflns_limit_h_min       -18
_diffrn_reflns_limit_k_max       8
_diffrn_reflns_limit_k_min       -19
_diffrn_reflns_limit_l_max       12
_diffrn_reflns_limit_l_min       -12
_diffrn_reflns_number            11695
_diffrn_reflns_theta_full        28.52
_diffrn_reflns_theta_max         28.52
_diffrn_reflns_theta_min         1.55
_exptl_absorpt_coefficient_mu    30.738
_exptl_absorpt_correction_T_max  0.23
_exptl_absorpt_correction_T_min  0.12
_exptl_absorpt_correction_type   numerical
_exptl_crystal_colour            silver
_exptl_crystal_density_diffrn    5.066
_exptl_crystal_description       'irregular fragment'
_exptl_crystal_F_000             2449
_exptl_crystal_size_max          0.10
_exptl_crystal_size_mid          0.09
_exptl_crystal_size_min          0.07
_refine_diff_density_max         3.356
_refine_diff_density_min         -1.759
_refine_diff_density_rms         0.340
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.140
_refine_ls_matrix_type           full
_refine_ls_number_parameters     57
_refine_ls_number_reflns         949
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.140
_refine_ls_R_factor_all          0.0701
_refine_ls_R_factor_gt           0.0495
_refine_ls_shift/su_max          0.183
_refine_ls_shift/su_mean         0.067
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0319P)^2^+56.6156P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1034
_refine_ls_wR_factor_ref         0.1127
_reflns_number_gt                745
_reflns_number_total             949
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ic401580y_si_002_1.cif
_cod_data_source_block           Na(AuGa)2
_cod_database_code               4336564