data_global _chemical_name_mineral 'Lizardite-2H1' loop_ _publ_author_name 'Guggenheim S' 'Zhan W' _journal_name_full 'The Canadian Mineralogist' _journal_volume 36 _journal_year 1998 _journal_page_first 1587 _journal_page_last 1594 _publ_section_title ; Effect of temperature on the structures of lizardite-1T and lizardite-2H1 Sample: T = 20 C ; _database_code_amcsd 0005586 _chemical_formula_sum 'Mg3 Si2 H4 O9' _cell_length_a 5.317 _cell_length_b 5.317 _cell_length_c 14.551 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 120 _cell_volume 356.252 _exptl_crystal_density_diffrn 2.583 _symmetry_space_group_name_H-M 'P 63 c m' loop_ _space_group_symop_operation_xyz 'x,y,z' '-x,-x+y,z' 'x-y,x,1/2+z' '-y,-x,1/2+z' '-y,x-y,z' 'x-y,-y,z' '-x,-y,1/2+z' 'x,x-y,1/2+z' '-x+y,-x,z' 'y,x,z' 'y,-x+y,1/2+z' '-x+y,y,1/2+z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z Mg 0.33270 0.00000 0.22250 Si 0.33333 0.66667 0.03140 H1 0.62200 0.00000 0.35400 H2 0.00000 0.00000 0.07500 O1 0.33333 0.66667 0.14060 O2 0.49100 0.00000 -0.00700 O3 0.66667 0.00000 0.28960 O4 0.00000 0.00000 0.14700 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 Mg 0.01100 0.00900 0.01900 0.00450 -0.00100 0.00000 Si 0.00870 0.00870 0.01100 0.00435 0.00000 0.00000 O1 0.01000 0.01000 0.02400 0.00500 0.00000 0.00000 O2 0.02000 0.02000 0.02800 0.01000 -0.01300 0.00000 O3 0.01900 0.02400 0.00800 0.01200 -0.00300 0.00000 O4 0.01600 0.01600 0.01300 0.00800 0.00000 0.00000