#------------------------------------------------------------------------------
#$Date: 2016-03-22 23:58:59 +0200 (Tue, 22 Mar 2016) $
#$Revision: 179087 $
#$URL: svn://www.crystallography.net/cod/cif/4/30/49/4304962.cif $
#------------------------------------------------------------------------------
#
# This file is available in the Crystallography Open Database (COD),
# http://www.crystallography.net/
#
# All data on this site have been placed in the public domain by the
# contributors.
#
data_4304962
loop_
_publ_author_name
'Qisheng Lin'
'John D. Corbett'
_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+0.001xFc²λ³/sin(2θ)]^-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/[σ²(Fo²)+(0.0238P)²+31.6002P] where P=(Fo²+2Fc²)/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
loop_
_symmetry_equiv_pos_as_xyz
'x, y, z'
'-x+1/2, -y, z+1/2'
'-x, y+1/2, -z+1/2'
'x+1/2, -y+1/2, -z'
'z, x, y'
'z+1/2, -x+1/2, -y'
'-z+1/2, -x, y+1/2'
'-z, x+1/2, -y+1/2'
'y, z, x'
'-y, z+1/2, -x+1/2'
'y+1/2, -z+1/2, -x'
'-y+1/2, -z, x+1/2'
'-x, -y, -z'
'x-1/2, y, -z-1/2'
'x, -y-1/2, z-1/2'
'-x-1/2, y-1/2, z'
'-z, -x, -y'
'-z-1/2, x-1/2, y'
'z-1/2, x, -y-1/2'
'z, -x-1/2, y-1/2'
'-y, -z, -x'
'y, -z-1/2, x-1/2'
'-y-1/2, z-1/2, x'
'y-1/2, z, -x-1/2'
loop_
_atom_site_label
_atom_site_type_symbol
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_U_iso_or_equiv
_atom_site_adp_type
_atom_site_occupancy
_atom_site_symmetry_multiplicity
_atom_site_calc_flag
_atom_site_refinement_flags
_atom_site_disorder_assembly
_atom_site_disorder_group
Au Au 0.25994(5) 0.35509(5) 0.08026(5) 0.0167(3) Uani 1 1 d . . .
Ga Ga 0.09961(18) 0.09961(18) 0.09961(18) 0.0194(6) Uani 1 3 d S . .
Ca Ca 0.3941(3) 0.3941(3) 0.3941(3) 0.0121(8) Uani 1 3 d S . .
loop_
_atom_site_aniso_label
_atom_site_aniso_U_11
_atom_site_aniso_U_22
_atom_site_aniso_U_33
_atom_site_aniso_U_23
_atom_site_aniso_U_13
_atom_site_aniso_U_12
Au 0.0202(3) 0.0139(3) 0.0160(3) -0.00263(17) -0.00231(17) 0.00037(17)
Ga 0.0194(6) 0.0194(6) 0.0194(6) 0.0062(6) 0.0062(6) 0.0062(6)
Ca 0.0121(8) 0.0121(8) 0.0121(8) 0.0005(8) 0.0005(8) 0.0005(8)
loop_
_atom_type_symbol
_atom_type_description
_atom_type_scat_dispersion_real
_atom_type_scat_dispersion_imag
_atom_type_scat_source
Ca Ca 0.2262 0.3064 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
Ga Ga 0.2307 1.6083 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
Au Au -2.0133 8.8022 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
loop_
_geom_bond_atom_site_label_1
_geom_bond_atom_site_label_2
_geom_bond_distance
_geom_bond_site_symmetry_2
_geom_bond_publ_flag
Au Ga 2.5687(9) 16_665 ?
Au Ga 2.747(2) . ?
Au Au 2.8191(5) 20_565 ?
Au Au 2.8191(5) 23_665 ?
Au Ca 3.0784(15) 15_565 ?
Au Au 3.0931(8) 19_656 ?
Au Au 3.0931(8) 22_565 ?
Au Au 3.1070(9) 5 ?
Au Au 3.1070(9) 9 ?
Au Ca 3.122(3) . ?
Au Ca 3.165(2) 2_564 ?
Au Ca 3.352(2) 14_556 ?
Ga Au 2.5687(9) 24_556 ?
Ga Au 2.5687(9) 16_655 ?
Ga Au 2.5687(9) 20_565 ?
Ga Au 2.747(2) 5 ?
Ga Au 2.747(2) 9 ?
Ga Ca 3.2641(8) 16_655 ?
Ga Ca 3.2641(7) 14_556 ?
Ga Ca 3.2641(7) 15_565 ?
Ca Au 3.0784(15) 15_566 ?
Ca Au 3.0784(15) 23_665 ?
Ca Au 3.0784(15) 19_656 ?
Ca Au 3.122(3) 5 ?
Ca Au 3.122(3) 9 ?
Ca Au 3.165(2) 6_556 ?
Ca Au 3.165(2) 2_565 ?
Ca Au 3.165(2) 10_655 ?
Ca Ga 3.2641(8) 15_566 ?
Ca Ga 3.2641(8) 14_656 ?
Ca Ga 3.2641(7) 16_665 ?
