data_global _chemical_name_mineral 'Georgeericksenite' loop_ _publ_author_name 'Cooper M A' 'Hawthorne F C' 'Roberts A C' 'Grice J D' 'Stirling J A R' 'Moffatt E A' _journal_name_full 'American Mineralogist' _journal_volume 83 _journal_year 1998 _journal_page_first 390 _journal_page_last 399 _publ_section_title ; Georgeericksenite, Na6CaMg(IO3)6(CrO4)2(H2O)12, a new mineral from Oficina Chacabuco, Chile: Description and crystal structure ; _database_code_amcsd 0001978 _chemical_formula_sum 'Ca Mg Na6 I6 Cr2 O40 H20' _cell_length_a 23.645 _cell_length_b 10.918 _cell_length_c 15.768 _cell_angle_alpha 90 _cell_angle_beta 114.42 _cell_angle_gamma 90 _cell_volume 3706.447 _exptl_crystal_density_diffrn 3.096 _symmetry_space_group_name_H-M 'C 1 2/c 1' loop_ _space_group_symop_operation_xyz 'x,y,z' '1/2+x,1/2+y,z' 'x,-y,1/2+z' '1/2+x,1/2-y,1/2+z' '-x,y,1/2-z' '1/2-x,1/2+y,1/2-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 Ca 0.00000 0.12230 0.25000 Mg 0.50000 0.10560 0.25000 Na1 0.13790 0.17830 0.17800 Na2 0.12280 0.39220 0.33040 Na3 0.37770 0.12910 0.01890 I1 0.12628 0.11870 0.49298 I2 0.00440 0.37451 0.08827 I3 0.36796 0.15586 0.29555 Cr 0.48430 0.34650 0.08520 O1 0.32720 0.25890 0.43170 O2 0.17890 0.06160 0.44560 O3 0.07860 0.21430 0.39500 O4 0.05110 0.28960 0.19280 O5 0.03360 0.47990 0.36240 O6 0.06300 0.47040 0.07670 O7 0.32720 0.28460 0.22470 O8 0.30810 0.04270 0.26010 O9 0.40750 0.09910 0.22780 O10 0.06140 0.18180 0.02060 O11 0.47720 0.23440 0.14500 O12 0.46680 0.47590 0.12040 O13 0.44460 0.35030 0.40380 Wat1 0.09750 0.02810 0.25220 Wat2 0.19470 0.33700 0.14370 Wat3 0.19820 0.24420 0.33590 OW4A 0.18950 -0.00300 0.16700 OW4B 0.19790 0.06300 0.11800 Wat5 0.18650 0.45560 0.48510 Wat6 0.31300 0.28090 0.04200 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 Ca 0.01600 0.01400 0.01400 0.00000 0.00200 0.00000 Mg 0.02300 0.01200 0.01300 0.00000 0.01100 0.00000 Na1 0.02900 0.02800 0.02500 -0.00100 0.01300 0.00300 Na2 0.02600 0.02200 0.02200 -0.00300 0.00500 0.00100 Na3 0.03000 0.03300 0.03700 0.00000 0.01200 -0.00400 I1 0.01640 0.01530 0.01430 0.00180 0.00380 0.00070 I2 0.01490 0.01370 0.01110 -0.00090 0.00530 -0.00080 I3 0.01770 0.01810 0.01750 -0.00030 0.00690 0.00410 Cr 0.01600 0.01200 0.01300 -0.00100 0.00400 0.00100 O1 0.02200 0.02400 0.01800 -0.00300 0.00400 -0.00500 O2 0.02700 0.03500 0.03100 -0.00100 0.01400 0.01100 O3 0.01900 0.01600 0.01500 0.00500 0.00000 0.00300 O4 0.01400 0.02700 0.01100 0.00400 0.00200 0.00400 O5 0.01500 0.02700 0.01500 0.00600 0.00400 -0.00400 O6 0.01300 0.02400 0.02600 -0.00100 0.00500 -0.00700 O7 0.04300 0.02200 0.02400 0.00300 0.00700 0.02300 O8 0.02300 0.05300 0.05500 0.02600 0.00100 -0.00900 O9 0.03200 0.04100 0.01700 0.00300 0.01600 0.01800 O10 0.04000 0.04900 0.02000 -0.01100 0.00100 0.00900 O11 0.09000 0.03200 0.05200 0.01500 0.03600 -0.00400 O12 0.03000 0.02500 0.02600 -0.00800 0.00300 -0.00100 O13 0.02500 0.05600 0.06900 0.01400 0.02100 -0.00100 Wat1 0.03800 0.02100 0.03800 -0.00400 0.01800 0.00500 Wat2 0.04400 0.02800 0.02400 0.00700 0.01400 -0.00200 Wat3 0.02000 0.03100 0.03300 -0.00700 0.01300 0.00400 Wat5 0.03200 0.02600 0.02400 -0.00700 0.01200 -0.00100 Wat6 0.05000 0.04300 0.04100 0.01100 0.02700 0.00400