data_global _chemical_name_mineral 'Clinojimthompsonite' loop_ _publ_author_name 'Veblen D R' 'Burnham C W' _journal_name_full 'American Mineralogist' _journal_volume 63 _journal_year 1978 _journal_page_first 1053 _journal_page_last 1073 _publ_section_title ; New biopyriboles from Chester, Vermont: II. The crystal chemistry of jimthompsonite, clinojimthompsonite, and chesterite, and the amphibole-mica reaction ; _database_code_amcsd 0000688 _chemical_formula_sum '(Mg3.979 Fe1.021) Si6 (O18 H2)' _cell_length_a 9.874 _cell_length_b 27.240 _cell_length_c 5.316 _cell_angle_alpha 90 _cell_angle_beta 109.5 _cell_angle_gamma 90 _cell_volume 1347.819 _exptl_crystal_density_diffrn 3.017 _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 _atom_site_occupancy _atom_site_U_iso_or_equiv Mg1 0.00000 0.02890 0.25000 0.96800 0.00177 Fe1 0.00000 0.02890 0.25000 0.03200 0.00177 Mg2 0.00000 0.08490 0.75000 0.95900 0.00203 Fe2 0.00000 0.08490 0.75000 0.04100 0.00203 Mg3 0.00000 0.14280 0.25000 0.90500 0.00228 Fe3 0.00000 0.14280 0.25000 0.09500 0.00228 Mg4 0.00000 0.20130 0.75000 0.99200 0.00190 Fe4 0.00000 0.20130 0.75000 0.00800 0.00190 Fe5 0.00000 0.25690 0.25000 0.84500 0.00545 Mg5 0.00000 0.25690 0.25000 0.15500 0.00545 Si1 0.29090 0.02770 0.76560 1.00000 0.00228 Si2 0.28800 0.13590 0.76100 1.00000 0.00304 Si3 0.29710 0.19620 0.26300 1.00000 0.00317 O-H 0.11530 0.08500 0.15660 1.00000 0.00291 O1 0.34990 0.00370 0.54130 1.00000 0.00532 O2 0.11540 0.02780 0.65520 1.00000 0.00595 O3 0.34490 0.08400 0.81970 1.00000 0.00418 O4 0.11490 0.14200 0.65550 1.00000 0.00608 O5 0.35350 0.17130 0.03440 1.00000 0.00747 O6 0.35230 0.16280 0.53900 1.00000 0.00963 O7 0.12190 0.19830 0.15360 1.00000 0.00570 O8 0.37770 0.24740 0.35810 1.00000 0.00608