data_global _chemical_name_mineral 'Leucophoenicite' loop_ _publ_author_name 'Welch M D' 'Marshall W G' 'Ross N L' 'Knight K S' _journal_name_full 'American Mineralogist' _journal_volume 87 _journal_year 2002 _journal_page_first 154 _journal_page_last 159 _publ_section_title ; H positions in leucophoenicite, Mn7Si3(OH)2: A close relative of the hydrous B phases Note: Neutron powder data ; _database_code_amcsd 0002751 _chemical_compound_source 'Franklin, New Jersey, USA' _chemical_formula_sum 'Mn6.28 Ca.64 Mg.04 Zn.04 Si3 O14 H2' _cell_length_a 10.8259 _cell_length_b 4.8565 _cell_length_c 11.3758 _cell_angle_alpha 90 _cell_angle_beta 103.956 _cell_angle_gamma 90 _cell_volume 580.439 _exptl_crystal_density_diffrn 3.917 _symmetry_space_group_name_H-M 'P 1 21/a 1' loop_ _space_group_symop_operation_xyz 'x,y,z' '1/2+x,1/2-y,z' '1/2-x,1/2+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 Mn1 0.00000 0.00000 0.00000 1.00000 0.01340 Mn2 0.31490 0.01500 0.13960 0.64000 0.01340 Ca2 0.31490 0.01500 0.13960 0.32000 0.01340 Mg2 0.31490 0.01500 0.13960 0.02000 0.01340 Zn2 0.31490 0.01500 0.13960 0.02000 0.01340 Mn3 0.33080 0.49600 0.41570 1.00000 0.01340 Mn4 0.08700 -0.00900 0.29570 1.00000 0.01340 Si1 0.02090 0.42300 0.43660 0.50000 0.00520 Si2 0.12710 0.57530 0.14180 1.00000 0.00520 O1 0.49160 -0.21740 0.14630 1.00000 0.00940 O2 0.33980 0.21980 -0.02380 1.00000 0.01410 O3 0.22700 -0.29010 0.25950 1.00000 0.00550 O4 0.41510 0.24100 0.30410 1.00000 0.02200 O5 0.17530 0.25390 0.43810 1.00000 0.01340 O6 0.12710 0.24570 0.14420 1.00000 0.00790 O7 0.52270 0.75800 0.43700 1.00000 0.02600 H1 -0.06600 0.42100 0.32600 0.50000 0.01500 H2 0.12650 0.40400 0.43600 0.50000 0.01500