Mn14Al56+xGe3-x (x= 0-0.6): A New Intermetallic Phase Containing Unprecedented "Half-Broken" Mackay Icosahedra as Building Units
Li-Ming Wu; Dong-Kyun Seo; Journal of the American Chemical Society 126 (2004) 4398–4403; doi:10.1021/ja039154f

data_4112389
_publ_section_title
;
 Mn14Al56+xGe3-x (x= 0-0.6): A New Intermetallic Phase Containing
 Unprecedented "Half-Broken" Mackay Icosahedra as Building Units
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              4398
_journal_page_last               4403
_journal_paper_doi               10.1021/ja039154f
_journal_volume                  126
_journal_year                    2004
_chemical_formula_sum            'Al56 Ge3 Mn14'
_chemical_formula_weight         2497.81
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           147
_symmetry_cell_setting           trigonal
_symmetry_space_group_name_Hall  '-P 3'
_symmetry_space_group_name_H-M   'P -3'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.000(4)
_cell_angle_beta                 90.000(4)
_cell_angle_gamma                120.000(4)
_cell_formula_units_Z            1
_cell_length_a                   11.098(2)
_cell_length_b                   11.098(2)
_cell_length_c                   10.3496(19)
_cell_measurement_temperature    298(2)
_cell_volume                     1103.9(3)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SHELXTL'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      298(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega scans'
_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  0.0618
_diffrn_reflns_av_sigmaI/netI    0.0427
_diffrn_reflns_limit_h_max       15
_diffrn_reflns_limit_h_min       -15
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            13099
_diffrn_reflns_theta_full        29.99
_diffrn_reflns_theta_max         29.99
_diffrn_reflns_theta_min         1.97
_diffrn_standards_decay_%        none
_diffrn_standards_interval_count none
_diffrn_standards_interval_time  none
_diffrn_standards_number         none
_exptl_absorpt_coefficient_mu    6.997
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   'SADABS (Sheldrick, 1996)'
_exptl_crystal_colour            Silvery
_exptl_crystal_density_diffrn    3.757
_exptl_crystal_description       Block
_exptl_crystal_F_000             1174
_exptl_crystal_size_max          0.07
_exptl_crystal_size_mid          0.06
_exptl_crystal_size_min          0.04
_refine_diff_density_max         0.873
_refine_diff_density_min         -1.182
_refine_diff_density_rms         0.193
_refine_ls_extinction_coef       0.00075(14)
_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   1.072
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     112
_refine_ls_number_reflns         2165
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.072
_refine_ls_R_factor_all          0.0465
_refine_ls_R_factor_gt           0.0431
_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^)+(0.0000P)^2^+9.8606P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0848
_refine_ls_wR_factor_ref         0.0865
_reflns_number_gt                2048
_reflns_number_total             2165
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja039154fsi20031213_050058.cif
_cod_data_source_block           w274
_cod_database_code               4112389