data_global _chemical_name_mineral 'Quartz' loop_ _publ_author_name 'Ikuta D' 'Kawame N' 'Banno S' 'Hirajima T' 'Ito K' 'Rakovan J F' 'Downs R T' 'Tamada O' _journal_name_full 'American Mineralogist' _journal_volume 92 _journal_year 2007 _journal_page_first 57 _journal_page_last 63 _publ_section_title ; First in situ X-ray diffraction identification of coesite and retrograde quartz on a glass thin section of an ultrahigh-pressure metamorphic rock and their crystal structure details Sample: in a thin section ; _database_code_amcsd 0004267 _chemical_compound_source 'Oomine granite, Tenkawa-mura, Nara, Southwest Japan' _chemical_formula_sum 'Si O2' _cell_length_a 4.917 _cell_length_b 4.917 _cell_length_c 5.410 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 120 _cell_volume 113.273 _exptl_crystal_density_diffrn 2.642 _symmetry_space_group_name_H-M 'P 32 2 1' loop_ _space_group_symop_operation_xyz 'x,y,z' 'y,x,2/3-z' '-y,x-y,2/3+z' '-x,-x+y,1/3-z' '-x+y,-x,1/3+z' 'x-y,-y,-z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z _atom_site_U_iso_or_equiv Si 0.47020 0.00000 0.00000 0.00960 O 0.41370 0.26720 0.11940 0.01350 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 Si 0.00960 0.00860 0.00990 0.00430 -0.00010 -0.00020 O 0.01700 0.01270 0.01440 0.00980 -0.00190 -0.00430