data_global
_chemical_name_mineral 'Mimetite'
loop_
_publ_author_name
'Yongshan D'
'Hughes J M'
'Moore P B'
_journal_name_full 'The Canadian Mineralogist'
_journal_volume 29 
_journal_year 1991
_journal_page_first 369
_journal_page_last 376
_publ_section_title
;
 The crystal structures of mimetite and clinomimetite, Pb5(AsO4)3Cl
 Note: previously known as clinomimetite, now considered a polytype, mimetite-M
;
_database_code_amcsd 0005265
_chemical_compound_source 'Johanngeorgenstat, Erzgebirge, Sachsen, Germany'
_chemical_formula_sum 'Pb5 As3 O12 Cl'
_cell_length_a 10.1891
_cell_length_b 20.3723
_cell_length_c 7.4564
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 119.8827
_cell_volume 1341.985
_exptl_crystal_density_diffrn      7.366
_symmetry_space_group_name_H-M 'P 1 1 21/b'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  'x,1/2+y,1/2-z'
  '-x,1/2-y,1/2+z'
  '-x,-y,-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_U_iso_or_equiv
Pb1A   0.66940   0.41415   0.00710   0.01440
Pb1B   0.33670   0.58059   0.50590   0.01420
Pb2A   0.00450   0.37558   0.23640   0.01430
Pb2B   0.25270   0.37298   0.73830   0.01570
Pb2C   0.24660   0.74861   0.27230   0.01370
AsA   0.38400   0.45450   0.25450   0.01610
AsB   0.41030   0.26330   0.75330   0.01500
AsC   0.02480   0.55800   0.24490   0.01230
O1A   0.49400   0.41300   0.25000   0.01940
O1B   0.33100   0.66700   0.76000   0.02720
O1C   0.83900   0.50400   0.24900   0.01560
O2A   0.48600   0.54860   0.23200   0.00740
O2B   0.60300   0.31000   0.74200   0.03820
O2C   0.10900   0.50500   0.27800   0.01450
O3A   0.25600   0.42200   0.08900   0.02400
O3B   0.61900   0.71000   0.05200   0.04100
O3C   0.08500   0.59900   0.05000   0.02860
O3D   0.28800   0.44000   0.44900   0.03120
O3E   0.65100   0.70500   0.41500   0.00290
O3F   0.08400   0.62300   0.40700   0.01410
Cl   0.00800   0.25050   0.49000   0.02040