# CIF file
data_findsym-output
_audit_creation_method FINDSYM

_chemical_name_mineral '$γ$-brass Cu$_{9}$Al$_{4}$'
_chemical_formula_sum 'Al4 Cu9'

loop_
_publ_author_name
 'L. Arnberg'
 'S. Westman'
_journal_name_full_name
;
 Acta Crystallographica Section A: Foundations and Advances
;
_journal_volume 34
_journal_year 1978
_journal_page_first 399
_journal_page_last 404
_publ_Section_title
;
 Crystal perfection in a noncentrosymmetric alloy. Refinement and test of twinning of the $γ$Cu$_{9}$Al$_{4}$ structure
;

# Found in Structure Types, 2005

_aflow_title '$\gamma$-brass (Cu$_{9}$Al$_{4}$, $D8_{3}$) Structure'
_aflow_proto 'A4B9_cP52_215_ei_3efgi'
_aflow_params 'a,x_{1},x_{2},x_{3},x_{4},x_{5},x_{6},x_{7},z_{7},x_{8},z_{8}'
_aflow_params_values '8.7068,0.1157,0.8296,0.3253,0.6066,0.3534,0.8549,0.8113,0.5332,0.3153,0.0322'
_aflow_Strukturbericht '$D8_{3}$'
_aflow_Pearson 'cP52'

_symmetry_space_group_name_H-M "P -4 3 m"
_symmetry_Int_Tables_number 215
 
_cell_length_a    8.70680
_cell_length_b    8.70680
_cell_length_c    8.70680
_cell_angle_alpha 90.00000
_cell_angle_beta  90.00000
_cell_angle_gamma 90.00000
 
loop_
_space_group_symop_id
_space_group_symop_operation_xyz
1 x,y,z
2 x,-y,-z
3 -x,y,-z
4 -x,-y,z
5 y,z,x
6 y,-z,-x
7 -y,z,-x
8 -y,-z,x
9 z,x,y
10 z,-x,-y
11 -z,x,-y
12 -z,-x,y
13 y,x,z
14 y,-x,-z
15 -y,x,-z
16 -y,-x,z
17 x,z,y
18 x,-z,-y
19 -x,z,-y
20 -x,-z,y
21 z,y,x
22 z,-y,-x
23 -z,y,-x
24 -z,-y,x
 
loop_
_atom_site_label
_atom_site_type_symbol
_atom_site_symmetry_multiplicity
_atom_site_Wyckoff_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_occupancy
Al1 Al   4 e 0.11570 0.11570 0.11570 1.00000
Cu1 Cu   4 e 0.82960 0.82960 0.82960 1.00000
Cu2 Cu   4 e 0.32530 0.32530 0.32530 1.00000
Cu3 Cu   4 e 0.60660 0.60660 0.60660 1.00000
Cu4 Cu   6 f 0.35340 0.00000 0.00000 1.00000
Cu5 Cu   6 g 0.85490 0.50000 0.50000 1.00000
Al2 Al  12 i 0.81130 0.81130 0.53320 1.00000
Cu6 Cu  12 i 0.31530 0.31530 0.03220 1.00000
