data_global _chemical_name_mineral 'Leadhillite' loop_ _publ_author_name 'Giuseppetti G' 'Mazzi F' 'Tadini C' _journal_name_full 'Neues Jahrbuch fur Mineralogie, Monatshefte' _journal_volume 1990 _journal_year 1990 _journal_page_first 255 _journal_page_last 268 _publ_section_title ; The crystal structure of leadhillite: Pb4(SO4)(CO3)2(OH)2 ; _database_code_amcsd 0014843 _chemical_compound_source 'Iglesiente area, Sardinia, Italy' _chemical_formula_sum 'Pb4 S C2 O12 H2' _cell_length_a 9.11 _cell_length_b 20.82 _cell_length_c 11.59 _cell_angle_alpha 90 _cell_angle_beta 90.46 _cell_angle_gamma 90 _cell_volume 2198.207 _exptl_crystal_density_diffrn 6.520 _symmetry_space_group_name_H-M 'P 1 21/a 1' loop_ _space_group_symop_operation_xyz 'x,y,z' '1/2+x,1/2-y,z' '1/2-x,1/2+y,-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 0.41790 0.17890 0.10830 0.01077 Pb2 0.42950 0.43240 0.10340 0.01077 Pb3 0.41430 0.69340 0.09390 0.01140 Pb4 0.40650 0.93850 0.10320 0.01077 Pb5 0.62600 0.04790 0.32110 0.02976 Pb6 0.55840 0.28260 0.33800 0.01596 Pb7 0.53540 0.57360 0.31880 0.03521 Pb8 0.60780 0.83190 0.31870 0.01684 S1 0.23000 0.07370 0.48730 0.01494 S2 0.23840 0.31750 0.51320 0.01381 C1 0.25600 0.05700 0.15800 0.02026 C2 0.25700 0.31300 0.14600 0.01267 C3 0.25000 0.56300 0.12400 0.01393 C4 0.24900 0.80900 0.15500 0.04686 O1 0.07400 0.08700 0.46500 0.05319 O2 0.10000 0.28100 0.54100 0.01267 O3 0.30000 0.13800 0.47500 0.02660 O4 0.20800 0.38700 0.51200 0.02913 O5 0.28500 0.02400 0.41100 0.07092 O6 0.29200 0.29300 0.40000 0.02786 O7 0.24200 0.05500 0.61400 0.02660 O8 0.34600 0.30400 0.60600 0.02786 O9 0.18400 0.00500 0.15000 0.01520 O10 0.18300 0.25800 0.15200 0.02153 O11 0.18300 0.50700 0.12900 0.01773 O12 0.17200 0.75800 0.13900 0.01267 O13 0.39700 0.05700 0.15300 0.02660 O14 0.40100 0.31100 0.15100 0.01267 O15 0.39500 0.56200 0.12800 0.02026 O16 0.38900 0.80700 0.15200 0.02406 O17 0.18300 0.11400 0.16400 0.02280 O18 0.18300 0.36700 0.13100 0.02280 O19 0.17200 0.61700 0.11900 0.01267 O20 0.18100 0.86800 0.15100 0.01393 O-H1 0.46700 0.18400 0.29400 0.03040 O-H2 0.38600 0.44800 0.28800 0.02153 O-H3 0.38800 0.67100 0.28400 0.01773 O-H4 0.46800 0.93600 0.29000 0.01773