data_global _chemical_name_mineral 'Slawsonite' loop_ _publ_author_name 'Benna P' 'Nestola F' 'Ballaran T B' 'Balic-Zunic T' 'Lundegaard L F' 'Bruno E' _journal_name_full 'American Mineralogist' _journal_volume 92 _journal_year 2007 _journal_page_first 1190 _journal_page_last 1199 _publ_section_title ; The high-pressure structural configurations of Ca0.2Sr0.8Al2Si2O8 feldspar: The I-1-I2/c and I2/c-P2_1/c phase transitions Sample: P = 3.2 GPa ; _database_code_amcsd 0004408 _chemical_compound_source 'Synthetic' _chemical_formula_sum '(Ca.2 Sr.8) Si2 Al2 O8' _cell_length_a 8.256 _cell_length_b 12.842 _cell_length_c 14.088 _cell_angle_alpha 90.51 _cell_angle_beta 115.38 _cell_angle_gamma 90.88 _cell_volume 1349.142 _exptl_crystal_density_diffrn 3.114 _symmetry_space_group_name_H-M 'I -1' loop_ _space_group_symop_operation_xyz 'x,y,z' '1/2+x,1/2+y,1/2+z' '-x,-y,-z' '1/2-x,1/2-y,1/2-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 Ca0 0.26750 0.00330 0.06740 0.20000 0.01900 Sr0 0.26750 0.00330 0.06740 0.80000 0.01900 Caz 0.26620 0.00590 0.56450 0.20000 0.01300 Srz 0.26620 0.00590 0.56450 0.80000 0.01300 Si100 0.00230 0.16910 0.10610 1.00000 0.01000 Al10z 0.99920 0.17250 0.61540 1.00000 0.00900 Al1m0 0.99850 0.81820 0.11760 1.00000 0.01100 Si1mz 0.00160 0.81930 0.60840 1.00000 0.00900 Al200 0.68810 0.11980 0.16740 1.00000 0.01000 Si20z 0.67900 0.11050 0.66780 1.00000 0.01100 Si2m0 0.67930 0.88410 0.17510 1.00000 0.01000 Al2mz 0.68830 0.87650 0.67240 1.00000 0.01000 OA10 0.00310 0.12600 0.99720 1.00000 0.01300 OA1z 0.99640 0.13360 0.49810 1.00000 0.01400 OA20 0.58290 0.99290 0.14330 1.00000 0.01900 OA2z 0.58290 0.99720 0.64500 1.00000 0.01800 OB00 0.82090 0.11250 0.09910 1.00000 0.01900 OB0z 0.79960 0.11880 0.60280 1.00000 0.01700 OBm0 0.80180 0.86420 0.11270 1.00000 0.01700 OBmz 0.82100 0.86740 0.60680 1.00000 0.01700 OC00 0.00430 0.29670 0.12140 1.00000 0.01200 OC0z 0.01160 0.30350 0.63970 1.00000 0.01700 OCm0 0.00720 0.68640 0.12280 1.00000 0.01900 OCmz 0.99870 0.69130 0.61160 1.00000 0.01800 OD00 0.18600 0.12090 0.19250 1.00000 0.01500 OD0z 0.19660 0.11670 0.70010 1.00000 0.01800 ODm0 0.19770 0.87680 0.20840 1.00000 0.01700 ODmz 0.18770 0.87130 0.69940 1.00000 0.01700