data_global _chemical_name_mineral 'Arfvedsonite' loop_ _publ_author_name 'Hawthorne F C' 'Ungaretti L' 'Oberti R' 'Bottazzi P' 'Czamanske G K' _journal_name_full 'American Mineralogist' _journal_volume 78 _journal_year 1993 _journal_page_first 733 _journal_page_last 745 _publ_section_title ; Li: an important component in igneous alkali amphiboles Sample: A(12) ; _database_code_amcsd 0001597 _chemical_compound_source 'Questa caldera, New Mexico' _chemical_formula_sum 'O23.2 F.8 (Si7.824 Al.176) Mg.31 Fe3.87 Mn.58 Ti.08 Zn.04 Li.17 Na2.415 Ca.08 K.223 H1.2' _cell_length_a 9.840 _cell_length_b 18.036 _cell_length_c 5.365 _cell_angle_alpha 90 _cell_angle_beta 104.05 _cell_angle_gamma 90 _cell_volume 923.665 _exptl_crystal_density_diffrn 3.389 _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_occupancy _atom_site_U_iso_or_equiv O1 0.11110 0.09030 0.20790 1.00000 0.00912 O2 0.12020 0.17200 0.73490 1.00000 0.00899 O3 0.11120 0.00000 0.70760 0.60000 0.01267 F 0.11120 0.00000 0.70760 0.40000 0.01267 O4 0.36490 0.24880 0.79860 1.00000 0.01191 O5 0.34880 0.12830 0.07980 1.00000 0.01178 O6 0.34050 0.12000 0.57810 1.00000 0.01153 O7 0.33410 0.00000 0.29700 1.00000 0.01267 SiT1 0.28010 0.08570 0.29020 0.97800 0.00583 AlT1 0.28010 0.08570 0.29020 0.02200 0.00583 SiT2 0.28990 0.17050 0.80020 0.97800 0.00621 AlT2 0.28990 0.17050 0.80020 0.02200 0.00621 MgM1 0.00000 0.09080 0.50000 0.11000 0.00760 Fe2+M1 0.00000 0.09080 0.50000 0.72000 0.00760 MnM1 0.00000 0.09080 0.50000 0.17000 0.00760 Fe2+M2 0.00000 0.18290 0.00000 0.29000 0.00722 Fe3+M2 0.00000 0.18290 0.00000 0.65000 0.00722 TiM2 0.00000 0.18290 0.00000 0.04000 0.00722 ZnM2 0.00000 0.18290 0.00000 0.02000 0.00722 LiM3 0.00000 0.00000 0.00000 0.17000 0.00747 MgM3 0.00000 0.00000 0.00000 0.09000 0.00747 Fe2+M3 0.00000 0.00000 0.00000 0.50000 0.00747 MnM3 0.00000 0.00000 0.00000 0.24000 0.00747 NaM4 0.00000 0.27700 0.50000 0.93500 0.01798 CaM4 0.00000 0.27700 0.50000 0.04000 0.01798 FeM4 0.00000 0.27700 0.50000 0.02500 0.01798 KA 0.00000 0.50000 0.00000 0.08300 0.12538 NaA 0.00000 0.50000 0.00000 0.20300 0.12538 KAm 0.04760 0.50000 0.11470 0.07000 0.03141 NaAm 0.04760 0.50000 0.11470 0.17100 0.03141 H 0.19830 0.00000 0.74720 0.60000 0.02039