data_global _chemical_name_mineral 'Sepiolite' loop_ _publ_author_name 'Sanchez M' 'Garcia-Romero E' 'Suarez M' 'Silva I' 'Fuentes-Montero L' 'Martinez-Criado G' _journal_name_full 'American Mineralogist' _journal_volume 96 _journal_year 2011 _journal_page_first 1443 _journal_page_last 1454 _publ_section_title ; Variability in sepiolite: Diffraction studies Note: Sample NOR225 Note: T = 225 C ; _database_code_amcsd 0018533 _chemical_compound_source 'Fauske, Nordland, Norway' _chemical_formula_sum 'Si6 Mg3.84 O19 H6' _cell_length_a 13.3765 _cell_length_b 27.0850 _cell_length_c 5.2757 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 90 _cell_volume 1911.399 _exptl_crystal_density_diffrn 1.987 _symmetry_space_group_name_H-M 'P n c n' 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' '1/2+x,1/2+y,-z' '1/2-x,1/2-y,z' 'x,-y,1/2+z' '-x,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_occupancy _atom_site_U_iso_or_equiv Si1 0.20160 0.02830 0.58500 1.00000 0.01570 Si2 0.20540 0.14100 0.57100 1.00000 0.01570 Si3 0.20260 0.19610 0.07500 1.00000 0.01570 Mg1 0.00000 0.03140 0.25000 0.96000 0.01355 Mg2 0.00000 0.08830 0.75000 0.96000 0.01355 Mg3 0.00000 0.14650 0.25000 0.96000 0.01355 Mg4 0.00000 0.20210 0.75000 0.96000 0.01355 O9 0.25000 0.25000 0.07900 1.00000 0.01482 O1 0.08500 0.02830 0.59600 1.00000 0.01482 O3 0.07870 0.14300 0.57800 1.00000 0.01482 O4 0.08690 0.19800 0.05700 1.00000 0.01482 O5 0.24630 0.00310 0.33100 1.00000 0.01482 O6 0.24360 0.08770 0.60200 1.00000 0.01482 O7 0.25120 0.16690 0.31800 1.00000 0.01482 O8 0.26420 0.17120 0.79400 1.00000 0.01482 O-H2 0.08460 0.08460 0.08400 1.00000 0.01482 Wat10 0.08070 0.25830 0.56100 1.00000 0.01482