data_global _chemical_name_mineral 'Bytownite' loop_ _publ_author_name 'Facchinelli A' 'Bruno E' 'Chiari G' _journal_name_full 'Acta Crystallographica, Section B' _journal_volume 35 _journal_year 1979 _journal_page_first 34 _journal_page_last 42 _publ_section_title ; The structure of bytownite quenched from 1723 K Sample: BytQ, P-1 model ; _database_code_amcsd 0009656 _chemical_compound_source 'satellite dyke, Traversella stock, Sesia Lanzo zone, Western Alps, Italy' _chemical_formula_sum '(Ca3.44 Na.56) Al7.76 Si8.24 O32' _cell_length_a 8.183 _cell_length_b 12.883 _cell_length_c 14.186 _cell_angle_alpha 93.38 _cell_angle_beta 115.87 _cell_angle_gamma 90.82 _cell_volume 1341.964 _exptl_crystal_density_diffrn 2.731 _symmetry_space_group_name_H-M 'P -1' loop_ _space_group_symop_operation_xyz 'x,y,z' '-x,-y,-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 Ca000 0.26650 0.98580 0.08420 0.86000 0.04699 Na000 0.26650 0.98580 0.08420 0.14000 0.04699 Ca0i0 0.77510 0.53520 0.54420 0.86000 0.01393 Na0i0 0.77510 0.53520 0.54420 0.14000 0.01393 Caz00 0.27150 0.03060 0.54550 0.86000 0.01368 Naz00 0.27150 0.03060 0.54550 0.14000 0.01368 Cazi0 0.76310 0.50400 0.07210 0.86000 0.06396 Nazi0 0.76310 0.50400 0.07210 0.14000 0.06396 AlT10000 0.00040 0.16560 0.10560 0.33000 0.01431 SiT10000 0.00040 0.16560 0.10560 0.67000 0.01431 AlT100i0 0.51240 0.65480 0.60440 0.17000 0.00317 SiT100i0 0.51240 0.65480 0.60440 0.83000 0.00317 AlT10z00 0.01370 0.16020 0.61180 0.67000 0.00608 SiT10z00 0.01370 0.16020 0.61180 0.33000 0.00608 AlT10zi0 0.49440 0.66770 0.10990 1.00000 0.00532 AlT1m000 0.99380 0.81000 0.11720 0.81000 0.00595 SiT1m000 0.99380 0.81000 0.11720 0.19000 0.00595 AlT1m0i0 0.50750 0.32020 0.61990 0.65000 0.00659 SiT1m0i0 0.50750 0.32020 0.61990 0.35000 0.00659 AlT1mz00 0.00960 0.82060 0.61300 0.10000 0.00646 SiT1mz00 0.00960 0.82060 0.61300 0.90000 0.00646 AlT1mzi0 0.49660 0.31280 0.11220 0.33000 0.01178 SiT1mzi0 0.49660 0.31280 0.11220 0.67000 0.01178 AlT20000 0.69260 0.11020 0.15670 0.74000 0.00671 SiT20000 0.69260 0.11020 0.15670 0.26000 0.00671 AlT200i0 0.18150 0.61270 0.66150 0.75000 0.00849 SiT200i0 0.18150 0.61270 0.66150 0.25000 0.00849 AlT20z00 0.67530 0.10730 0.66120 0.38000 0.00671 SiT20z00 0.67530 0.10730 0.66120 0.62000 0.00671 AlT20zi0 0.18340 0.60590 0.15470 0.02000 0.00038 SiT20zi0 0.18340 0.60590 0.15470 0.98000 0.00038 AlT2m000 0.67350 0.88290 0.18310 0.26000 0.00963 SiT2m000 0.67350 0.88290 0.18310 0.74000 0.00963 AlT2m0i0 0.18070 0.37920 0.67770 0.11000 0.00963 SiT2m0i0 0.18070 0.37920 0.67770 0.89000 0.00963 AlT2mz00 0.68830 0.87340 0.67570 0.64000 0.00735 SiT2mz00 0.68830 0.87340 0.67570 0.36000 0.00735 AlT2mzi0 0.17760 0.37850 0.17980 0.80000 0.00595 SiT2mzi0 0.17760 0.37850 0.17980 0.20000 0.00595 OA1000 0.02510 0.13030 0.99530 1.00000 0.01634 OA10i0 0.49050 0.62340 0.48680 1.00000 0.01102 OA1z00 0.98540 0.12630 0.48720 1.00000 0.01292 OA1zi0 0.51920 0.62640 0.99360 1.00000 0.01697 OA2000 0.56820 0.99260 0.14300 1.00000 0.01077 OA20i0 0.08350 0.48750 0.63590 1.00000 0.00874 OA2z00 0.57530 0.98700 0.63260 1.00000 0.01267 OA2zi0 0.07470 0.49470 0.14420 1.00000 0.01115 OB0000 0.81090 0.10250 0.08490 1.00000 0.01634 OB00i0 0.32680 0.59960 0.59900 1.00000 0.01912 OB0z00 0.81620 0.09710 0.60270 1.00000 0.01381 OB0zi0 0.28960 0.60710 0.08520 1.00000 0.01279 OBm000 0.81790 0.85090 0.13680 1.00000 0.02444 OBm0i0 0.30260 0.35790 0.61470 1.00000 0.01684 OBmz00 0.81000 0.85520 0.60700 1.00000 0.01545 OBmzi0 0.33080 0.35560 0.12930 1.00000 0.02280 OC0000 0.99920 0.28760 0.13340 1.00000 0.01596 OC00i0 0.52430 0.77770 0.64110 1.00000 0.01051 OC0z00 0.02380 0.28920 0.64390 1.00000 0.01900 OC0zi0 0.50830 0.79640 0.15070 1.00000 0.01039 OCm000 0.00420 0.67720 0.11130 1.00000 0.01634 OCm0i0 0.51600 0.18590 0.60420 1.00000 0.01697 OCmz00 0.02050 0.69470 0.59970 1.00000 0.01545 OCmzi0 0.49750 0.18540 0.10410 1.00000 0.00621 OD0000 0.18460 0.10920 0.19250 1.00000 0.01507 OD00i0 0.70230 0.60470 0.68310 1.00000 0.01216 OD0z00 0.20950 0.10550 0.68710 1.00000 0.01305 OD0zi0 0.69090 0.60160 0.19590 1.00000 0.01722 ODm000 0.20310 0.87040 0.20940 1.00000 0.00899 ODm0i0 0.68270 0.36430 0.72670 1.00000 0.01748 ODmz00 0.17660 0.85840 0.71740 1.00000 0.01735 ODmzi0 0.70000 0.36640 0.20560 1.00000 0.02394 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 Ca000 0.01809 0.09115 0.03202 -0.01245 0.00901 -0.03397 Na000 0.01809 0.09115 0.03202 -0.01245 0.00901 -0.03397 Ca0i0 0.01288 0.01923 0.00985 0.00431 0.00190 -0.00166 Na0i0 0.01288 0.01923 0.00985 0.00431 0.00190 -0.00166 Caz00 0.01151 0.01672 0.01232 0.00527 0.00380 -0.00166 Naz00 0.01151 0.01672 0.01232 0.00527 0.00380 -0.00166 Cazi0 0.01809 0.12376 0.04926 -0.01149 0.01233 -0.06049 Nazi0 0.01809 0.12376 0.04926 -0.01149 0.01233 -0.06049