data_global
_chemical_name_mineral 'Matlockite'
loop_
_publ_author_name
'Pasero M'
'Perchiazzi N'
_journal_name_full 'Mineralogical Magazine'
_journal_volume 60 
_journal_year 1996
_journal_page_first 833
_journal_page_last 836
_publ_section_title
;
 Crystal structure refinement of matlockite
;
_database_code_amcsd 0014521
_chemical_compound_source 'Baratti beach, Tuscany, Italy'
_chemical_formula_sum 'Pb F Cl'
_cell_length_a 4.110
_cell_length_b 4.110
_cell_length_c 7.246
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 122.400
_exptl_crystal_density_diffrn      7.099
_symmetry_space_group_name_H-M 'P 4/n m m'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '1/2-y,1/2-x,z'
  '1/2+y,1/2+x,-z'
  '1/2+y,-x,-z'
  '1/2-y,x,z'
  'x,1/2-y,z'
  '-x,1/2+y,-z'
  '1/2+x,1/2+y,-z'
  '1/2-x,1/2-y,z'
  'y,x,z'
  '-y,-x,-z'
  '-y,1/2+x,-z'
  'y,1/2-x,z'
  '1/2-x,y,z'
  '1/2+x,-y,-z'
  '-x,-y,-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
Pb   0.25000   0.25000   0.20580
F   0.25000   0.75000   0.00000
Cl   0.25000   0.25000   0.64970
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
Pb 0.00700 0.00700 0.00700 0.00000 0.00000 0.00000
F 0.00500 0.00500 0.00500 0.00000 0.00000 0.00000
Cl 0.01200 0.01200 0.00800 0.00000 0.00000 0.00000