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 = 300 C ; _database_code_amcsd 0005587 _chemical_formula_sum 'Mg3 Si2 O9' _cell_length_a 5.336 _cell_length_b 5.336 _cell_length_c 14.614 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 120 _cell_volume 360.356 _exptl_crystal_density_diffrn 2.517 _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 0.33200 0.00000 0.21880 Si 0.33333 0.66667 0.02920 O1 0.33333 0.66667 0.14060 O2 0.49400 0.00000 -0.00900 O3 0.66667 0.00000 0.28590 O4 0.00000 0.00000 0.14400 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 0.01800 0.01500 0.01800 0.00750 0.00000 0.00000 Si 0.01300 0.01300 0.01200 0.00650 0.00000 0.00000 O1 0.02300 0.02300 0.01500 0.01150 0.00000 0.00000 O2 0.03800 0.02900 0.03000 0.01450 -0.01400 0.00000 O3 0.02400 0.02500 0.03100 0.01250 -0.00200 0.00000 O4 0.02000 0.02000 0.02600 0.01000 0.00000 0.00000