data_global _chemical_name_mineral 'Microcline' loop_ _publ_author_name 'Ribbe P H' _journal_name_full 'American Mineralogist' _journal_volume 64 _journal_year 1979 _journal_page_first 402 _journal_page_last 408 _publ_section_title ; The structure of a strained intermediate microcline in cryptoperthitic association with twinned plagioclase feldspar ; _database_code_amcsd 0000714 _chemical_compound_source 'Kongnat syenite, SW Greenland' _chemical_formula_sum 'K (Si3 Al) O8' _cell_length_a 8.643 _cell_length_b 12.929 _cell_length_c 7.190 _cell_angle_alpha 90.1 _cell_angle_beta 116.2 _cell_angle_gamma 89.6 _cell_volume 720.883 _exptl_crystal_density_diffrn 2.565 _symmetry_space_group_name_H-M 'C -1' loop_ _space_group_symop_operation_xyz 'x,y,z' '1/2+x,1/2+y,z' '-x,-y,-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_occupancy K 0.28670 0.99850 0.14060 1.00000 Si1o 0.00950 0.18440 0.22250 0.75000 Al1o 0.00950 0.18440 0.22250 0.25000 Si1m 0.00910 0.81680 0.22490 0.75000 Al1m 0.00910 0.81680 0.22490 0.25000 Si2o 0.71050 0.11840 0.34130 0.75000 Al2o 0.71050 0.11840 0.34130 0.25000 Si2m 0.70950 0.88260 0.34330 0.75000 Al2m 0.70950 0.88260 0.34330 0.25000 Oa1 0.00050 0.14400 0.99770 1.00000 Oa2 0.63820 0.00110 0.28090 1.00000 Obo 0.82510 0.14720 0.22280 1.00000 Obm 0.82780 0.85340 0.22740 1.00000 Oco 0.03670 0.31160 0.25800 1.00000 Ocm 0.03780 0.69030 0.26020 1.00000 Odo 0.18150 0.12400 0.40750 1.00000 Odm 0.17900 0.87490 0.40850 1.00000 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 K 0.02133 0.03218 0.03268 0.00152 0.00988 0.00085 Si1o 0.01554 0.00762 0.01349 0.00102 0.00786 0.00085 Al1o 0.01554 0.00762 0.01349 0.00102 0.00786 0.00085 Si1m 0.01584 0.00593 0.01328 0.00305 0.00735 0.00211 Al1m 0.01584 0.00593 0.01328 0.00305 0.00735 0.00211 Si2o 0.01645 0.00423 0.01602 0.00051 0.00710 0.00254 Al2o 0.01645 0.00423 0.01602 0.00051 0.00710 0.00254 Si2m 0.01645 0.00593 0.01834 0.00051 0.00710 0.00042 Al2m 0.01645 0.00593 0.01834 0.00051 0.00710 0.00042 Oa1 0.03382 0.01524 0.03352 0.00000 0.01673 0.00254 Oa2 0.02803 0.01524 0.02509 0.00203 0.00456 0.00380 Obo 0.03138 0.03218 0.03352 -0.00559 0.01977 0.00254 Obm 0.03290 0.03641 0.02952 0.00102 0.01723 0.00000 Oco 0.02437 0.01778 0.03163 -0.00152 0.01166 -0.00380 Ocm 0.02376 0.01186 0.02973 0.00203 0.00988 0.00380 Odo 0.03321 0.01016 0.02657 0.00051 0.01014 0.00254 Odm 0.02925 0.01355 0.02846 0.00102 0.00963 0.00000