data_global _chemical_name_mineral 'Hennomartinite' loop_ _publ_author_name 'Libowitzky E' 'Armbruster T' _journal_name_full 'American Mineralogist' _journal_volume 81 _journal_year 1996 _journal_page_first 9 _journal_page_last 18 _publ_section_title ; Lawsonite-type phase transitions in hennomartinite, SrMn2[Si2O7](OH)2.H2O T = 22 C ; _database_code_amcsd 0001769 _chemical_formula_sum 'Sr Mn2 Si2 O10 H8' _cell_length_a 6.247 _cell_length_b 9.034 _cell_length_c 13.401 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 90 _cell_volume 756.291 _exptl_crystal_density_diffrn 3.704 _symmetry_space_group_name_H-M 'P 21 c n' loop_ _space_group_symop_operation_xyz 'x,y,z' 'x,-y,1/2+z' '1/2+x,1/2+y,1/2-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_U_iso_or_equiv Sr 0.01703 0.31155 0.25170 ? Mn 0.24540 0.25660 -0.00510 ? Mn1 0.24820 0.25080 0.50230 ? Si -0.00100 0.97150 0.13150 ? Si1 -0.00400 0.96700 0.36670 ? O1 -0.01790 0.02020 0.24770 ? O2 0.28200 0.37200 0.11300 ? O21 0.28000 0.37900 0.39150 ? O22 -0.28700 -0.37180 -0.11710 ? O23 -0.29400 -0.35940 -0.37520 ? O3 0.00100 0.12800 0.07460 ? O31 0.01100 0.12700 0.42270 ? O4 -0.00100 0.63680 0.04620 ? O41 -0.01700 0.62690 0.46310 ? O5 -0.02500 0.60820 0.24750 ? HwL -0.14800 0.62600 0.26000 0.05003 HwR -0.14800 0.62600 0.24000 0.05003 Hw1L -0.02000 0.64200 0.19500 0.05003 Hw1R -0.02000 0.64200 0.30500 0.05003 HhL -0.09000 0.61000 0.41500 0.08004 HhR -0.09000 0.61000 0.08500 0.08004 Hh1L 0.03000 0.55100 0.03000 0.08004 Hh1R 0.03000 0.55100 0.47000 0.08004 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 Sr 0.00800 0.01000 0.00770 -0.00090 0.00290 0.00030 Mn 0.00560 0.00460 0.00470 0.00030 -0.00210 0.00160 Mn1 0.00560 0.00460 0.00470 0.00030 -0.00210 0.00160 Si 0.00630 0.00440 0.00510 0.00000 -0.00100 0.00100 Si1 0.00630 0.00440 0.00510 0.00000 -0.00100 0.00100 O1 0.01200 0.00950 0.00500 -0.00100 -0.00500 -0.00100 O2 0.00880 0.00730 0.00650 -0.00160 -0.00200 -0.00200 O21 0.00880 0.00730 0.00650 -0.00160 -0.00200 -0.00200 O22 0.00880 0.00730 0.00650 -0.00160 -0.00200 -0.00200 O23 0.00880 0.00730 0.00650 -0.00160 -0.00200 -0.00200 O3 0.00900 0.00650 0.00850 0.00010 0.00100 -0.00100 O31 0.00900 0.00650 0.00850 0.00010 0.00100 -0.00100 O4 0.00800 0.00780 0.00810 -0.00070 0.00100 -0.00100 O41 0.00800 0.00780 0.00810 -0.00070 0.00100 -0.00100 O5 0.03700 0.02100 0.01900 -0.00600 -0.01900 0.00000