Interpenetrating Networks of Three-Dimensional Penrose Tiles in CaAu3Ga, the Structurally Simplest Cubic Approximant of an Icosahedral Quasicrystal
Qisheng Lin; John D. Corbett; Inorganic Chemistry 47 (2008) 3462–3464; doi:10.1021/ic800087q

data_4304962
_publ_contact_author_address
;Dept. of Chem.
Iowa State University
Ames, IA, 50011
;
_publ_contact_author_email       jcorbett@iastate.edu
_publ_contact_author_name        'John D. Corbett'
_publ_section_title
;
Interpenetrating Networks of Three-Dimensional Penrose Tiles in CaAu3Ga,
the Structurally Simplest Cubic Approximant of an Icosahedral Quasicrystal
;
_journal_name_full               'Inorganic Chemistry'
_journal_page_first              3462
_journal_page_last               3464
_journal_paper_doi               10.1021/ic800087q
_journal_volume                  47
_journal_year                    2008
_chemical_formula_sum            'Au3 Ca Ga'
_chemical_formula_weight         700.70
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           205
_symmetry_cell_setting           cubic
_symmetry_space_group_name_Hall  '-P 2ac 2ab 3'
_symmetry_space_group_name_H-M   'P a -3'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   9.0882(7)
_cell_length_b                   9.0882(7)
_cell_length_c                   9.0882(7)
_cell_measurement_temperature    273(2)
_cell_volume                     750.64(10)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      273(2)
_diffrn_measured_fraction_theta_full 0.987
_diffrn_measured_fraction_theta_max 0.987
_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  0.0561
_diffrn_reflns_av_sigmaI/netI    0.0234
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -6
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       11
_diffrn_reflns_limit_l_min       -12
_diffrn_reflns_number            4201
_diffrn_reflns_theta_full        28.19
_diffrn_reflns_theta_max         28.19
_diffrn_reflns_theta_min         3.88
_exptl_absorpt_coefficient_mu    125.109
_exptl_absorpt_correction_T_max  0.000705
_exptl_absorpt_correction_T_min  0.0000913
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(SADABS; Sheldrick, 2003)'
_exptl_crystal_density_diffrn    12.400
_exptl_crystal_density_method    'not measured'
_exptl_crystal_F_000             2304
_refine_diff_density_max         2.266
_refine_diff_density_min         -2.681
_refine_diff_density_rms         0.478
_refine_ls_extinction_coef       0.00053(9)
_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   1.182
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     17
_refine_ls_number_reflns         309
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.182
_refine_ls_R_factor_all          0.0294
_refine_ls_R_factor_gt           0.0284
_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^)+(0.0238P)^2^+31.6002P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0628
_refine_ls_wR_factor_ref         0.0634
_reflns_number_gt                303
_reflns_number_total             309
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ic800087q-file001_1.cif
_cod_data_source_block           CaAu3Ga
_cod_database_code               4304962