data_global _chemical_name_mineral 'Magnesiozippeite' loop_ _publ_author_name 'Burns P C' 'Deely K M' 'Hayden L A' _journal_name_full 'The Canadian Mineralogist' _journal_volume 41 _journal_year 2003 _journal_page_first 687 _journal_page_last 706 _publ_section_title ; The crystal chemistry of the zippeite group Sample: Magnesium-zippeite ; _database_code_amcsd 0005851 _chemical_formula_sum 'U4 S2 Mg2 O27 H14' _cell_length_a 8.6514 _cell_length_b 14.1939 _cell_length_c 17.7211 _cell_angle_alpha 90 _cell_angle_beta 104.131 _cell_angle_gamma 90 _cell_volume 2110.251 _exptl_crystal_density_diffrn 4.756 _symmetry_space_group_name_H-M 'C 1 2/m 1' loop_ _space_group_symop_operation_xyz 'x,y,z' '1/2+x,1/2+y,z' 'x,-y,z' '1/2+x,1/2-y,z' '-x,y,-z' '1/2-x,1/2+y,-z' '-x,-y,-z' '1/2-x,1/2-y,-z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z _atom_site_U_iso_or_equiv U(1) 0.66710 0.23240 0.33490 0.00900 U(2) 0.33290 0.26740 0.16510 0.01000 S(1) 0.00000 0.26000 0.00000 0.00600 S(2) 0.00000 0.25520 0.50000 0.01100 Mg(1) 0.68980 0.50000 0.37830 0.02700 Mg(2) 0.30700 0.00000 0.12900 0.01900 O(1) 0.87910 0.18830 0.45090 0.02000 O(2) -0.11980 0.31680 -0.05050 0.01400 O(3) 0.39600 0.23990 0.29440 0.00700 O(4) -0.07570 0.19600 0.04750 0.01500 O(5) 0.93390 0.31300 0.55150 0.01600 O(6) 0.60100 0.24230 0.20520 0.01100 O(7) 0.65580 0.10830 0.31860 0.01700 O(8) 0.34200 0.39360 0.18130 0.02000 O(9) 0.31560 0.14380 0.13690 0.02100 O(10) 0.68550 0.35680 0.36330 0.01600 Wat(11) 0.70230 0.50000 0.48840 0.02800 Wat(12) 0.34600 0.00000 0.01030 0.04600 Wat(13) 0.55220 0.00000 0.15640 0.03400 Wat(14) 0.46020 0.50000 0.32100 0.03100 Wat(15) 0.93200 0.50000 0.38730 0.02900 Wat(16) 0.17130 0.00000 0.23840 0.04600 Wat(17) 0.06610 0.00000 0.07490 0.03300