data_global
_chemical_name_mineral 'Georgiadesite'
loop_
_publ_author_name
'Pasero M'
'Vacchiano D'
_journal_name_full 'Mineralogical Magazine'
_journal_volume 64 
_journal_year 2000
_journal_page_first 879
_journal_page_last 884
_publ_section_title
;
 Crystal structure and revision of the chemical formula of georgiadesite,
 Pb4(AsO3)Cl4(OH)
;
_database_code_amcsd 0014543
_chemical_compound_source 'Laurion, Attica, Greece'
_chemical_formula_sum 'Pb4 As Cl4 O4 H'
_cell_length_a 13.765
_cell_length_b 7.896
_cell_length_c 10.804
_cell_angle_alpha 90
_cell_angle_beta 102.57
_cell_angle_gamma 90
_cell_volume 1146.124
_exptl_crystal_density_diffrn      6.436
_symmetry_space_group_name_H-M 'P 1 21/c 1'
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
Pb1   0.58530   0.22140   0.86880 ?
Pb2   0.81260   0.09780   0.65020 ?
Pb3   0.05560   0.24220   0.48310 ?
Pb4   0.33460   0.24280   0.55520 ?
As   0.80010   0.04800   0.34590 ?
Cl1   0.21200   0.55600   0.55700 ?
Cl2   1.00300  -0.06000   0.78100 ?
Cl3   0.42000   0.44200   0.84400 ?
Cl4   0.59300   0.09900   1.12900 ?
O1   0.69500   0.06000   0.43600   0.01500
O2   0.90100   0.05500   0.48600   0.03000
O3   0.79200  -0.17300   0.34700   0.03000
O4   0.20000   0.20100   0.39000   0.04000
H   0.19200   0.26700   0.31300 ?
loop_
_atom_site_aniso_label
_atom_site_aniso_U_11
_atom_site_aniso_U_22
_atom_site_aniso_U_33
_atom_site_aniso_U_12
_atom_site_aniso_U_13
_atom_site_aniso_U_23
Pb1 0.03200 0.04000 0.03700 0.00100 0.00600 0.00100
Pb2 0.04400 0.04200 0.03400 0.00100 0.00700 0.00700
Pb3 0.03800 0.03900 0.03800 0.00300 0.00700 0.00100
Pb4 0.03400 0.04200 0.04100 0.00400 0.00500 0.00200
As 0.03600 0.03100 0.03600 0.00700 0.00900 0.00800
Cl1 0.04000 0.04000 0.06000 0.01000 0.01300 0.00000
Cl2 0.04000 0.10000 0.04000 0.01000 0.01000 0.00000
Cl3 0.04000 0.07000 0.05000 0.00000 0.00700 0.01000
Cl4 0.07000 0.07000 0.03000 0.02000 0.01000 0.00000