data_global _chemical_name_mineral 'Proto-anthophyllite' loop_ _publ_author_name 'Konishi H' 'Groy T L' 'Dodony I' 'Miyawaki R' 'Matsubara S' 'Buseck P R' _journal_name_full 'American Mineralogist' _journal_volume 88 _journal_year 2003 _journal_page_first 1718 _journal_page_last 1723 _publ_section_title ; Crystal structure of protoanthophyllite: A new mineral from the Takese ultramafic complex, Japan ; _database_code_amcsd 0003184 _chemical_formula_sum 'Mg6.378 Fe.622 Si7.96 Al.048 O24 H2 Na.048' _cell_length_a 9.3553 _cell_length_b 17.9308 _cell_length_c 5.3117 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 90 _cell_volume 891.027 _exptl_crystal_density_diffrn 2.988 _symmetry_space_group_name_H-M 'P n m 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,1/2-z' '1/2-x,1/2-y,1/2+z' 'x,-y,z' '-x,y,-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 MgM1 0.00000 0.08724 0.50000 0.97880 0.00670 FeM1 0.00000 0.08724 0.50000 0.02120 0.00670 MgM2 0.00000 0.17748 0.00000 1.00000 0.00660 MgM3 0.00000 0.00000 0.00000 0.97490 0.00830 FeM3 0.00000 0.00000 0.00000 0.02510 0.00830 MgM4 0.00000 0.25991 0.50000 0.72260 0.00850 FeM4 0.00000 0.25991 0.50000 0.27730 0.00850 SiT1 0.28464 0.08483 0.17327 0.99710 0.00548 AlT1 0.28464 0.08483 0.17327 0.00400 0.00548 SiT2 0.29399 0.17095 0.67034 0.99280 0.00632 AlT2 0.29399 0.17095 0.67034 0.00800 0.00632 O1 0.11279 0.08668 0.16660 1.00000 0.00840 O2 0.12137 0.17464 0.66990 1.00000 0.00910 O3 0.11280 0.00000 0.66560 1.00000 0.00900 O4 0.12110 0.25265 0.18340 1.00000 0.00930 O5 0.34360 0.11987 0.43300 1.00000 0.01180 O6 0.34888 0.13244 0.93740 1.00000 0.01220 O7 0.34140 0.00000 0.15020 1.00000 0.01020 H 0.22500 0.00000 0.68200 1.00000 0.03600 NaA 0.50000 0.00000 0.50000 0.04800 0.05000 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 MgM1 0.00870 0.00480 0.00680 0.00000 -0.00020 0.00000 FeM1 0.00870 0.00480 0.00680 0.00000 -0.00020 0.00000 MgM2 0.00670 0.00640 0.00680 0.00000 0.00030 0.00000 MgM3 0.00920 0.00740 0.00830 0.00000 -0.00120 0.00000 FeM3 0.00920 0.00740 0.00830 0.00000 -0.00120 0.00000 MgM4 0.00960 0.00900 0.00700 0.00000 -0.00200 0.00000 FeM4 0.00960 0.00900 0.00700 0.00000 -0.00200 0.00000 SiT1 0.00520 0.00530 0.00600 -0.00030 -0.00010 0.00030 AlT1 0.00520 0.00530 0.00600 -0.00030 -0.00010 0.00030 SiT2 0.00580 0.00650 0.00660 -0.00090 0.00010 -0.00010 AlT2 0.00580 0.00650 0.00660 -0.00090 0.00010 -0.00010 O1 0.00900 0.00810 0.00830 0.00070 0.00100 -0.00030 O2 0.01160 0.00720 0.00830 -0.00090 -0.00050 0.00020 O3 0.00760 0.00890 0.01040 0.00000 0.00040 0.00000 O4 0.01160 0.00640 0.00990 -0.00220 0.00050 -0.00010 O5 0.01010 0.01380 0.01150 0.00050 -0.00160 -0.00510 O6 0.00880 0.01510 0.01250 -0.00050 -0.00010 0.00490 O7 0.00680 0.00790 0.01580 0.00000 0.00190 0.00000