data_global
_chemical_name_mineral 'Leucostaurite'
loop_
_publ_author_name
'Brugger J'
'Meisser N'
'Ansermat S'
'Krivovichev S V'
'Kahlenberg V'
'Belton D'
'Ryan C G'
_journal_name_full 'American Mineralogist'
_journal_volume 97 
_journal_year 2012
_journal_page_first 1206
_journal_page_last 1212
_publ_section_title
;
 Leucostaurite, Pb2[B5O9]Cl*0.5H2O, from the Atacama Desert: The first Pb-dominant
 member of the hilgardite group, and micro-determination of boron minerals by PIGE
;
_database_code_amcsd 0019064
_chemical_compound_source 'Mina Asuncion, Atacama Desert, Chile'
_chemical_formula_sum 'Pb4 Cl2 B10 O19 H2'
_cell_length_a 11.376
_cell_length_b 11.505
_cell_length_c 6.5568
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 858.160
_exptl_crystal_density_diffrn      5.084
_symmetry_space_group_name_H-M 'P n n 2'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '1/2+x,1/2-y,1/2+z'
  '1/2-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   0.03790   0.76058   0.34570   0.01890
Pb2   0.72760   0.97810   0.51670   0.02570
Cl1   0.50000   0.00000   0.78000   0.03600
Cl2   0.00000   0.00000   0.47400   0.03200
B1   0.82000   0.73500   0.64100   0.01300
B2   0.74100   0.53100   0.51700   0.01000
B3   0.98800   0.75300   0.86900   0.01000
B4   0.71200   0.32100   0.50300   0.01200
B5   0.71000   0.71300   0.31500   0.01500
O1   0.94400   0.72800   0.69100   0.02200
O2   0.76100   0.62500   0.69000   0.02200
O3   0.81100   0.76600   0.43200   0.01000
O4   0.71400   0.58300   0.34300   0.02300
O5   0.91900   0.79300   0.01900   0.02000
O6   0.76400   0.82200   0.77700   0.01400
O7   0.77600   0.22900   0.59700   0.01500
O8   0.60800   0.76000   0.41900   0.01700
O9   0.74000   0.43400   0.59700   0.02200
Wat10   0.00000   0.50000   0.81800   0.07000
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 0.02060 0.02400 0.01210 0.00040 -0.00030 0.00020
Pb2 0.03340 0.02620 0.01740 0.00340 0.00140 0.00290
Cl1 0.02300 0.03500 0.05000 0.00400 0.00000 0.00000
Cl2 0.03000 0.02100 0.04500 -0.00600 0.00000 0.00000