data_global _chemical_name_mineral 'Metanatrolite' loop_ _publ_author_name 'Baur W H' 'Joswig W' _journal_name_full 'Neues Jahrbuch fur Mineralogie, Monatshefte' _journal_volume 1996 _journal_year 1996 _journal_page_first 171 _journal_page_last 187 _publ_section_title ; The phases of natrolite occurring during dehydration and rehydration studied by single crystal X-ray diffraction methods between room temperature and 923 K Sample: T = 598 K, crystal IV, "metanatrolite" ; _database_code_amcsd 0014887 _chemical_compound_source 'Khibiny, Kola peninsula, Russia' _chemical_formula_sum 'Na1.88 Al1.811 Si2.73 O10' _cell_length_a 16.223 _cell_length_b 17.029 _cell_length_c 6.438 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 90.0 _cell_volume 1778.571 _exptl_crystal_density_diffrn 2.455 _symmetry_space_group_name_H-M 'F 1 1 2' loop_ _space_group_symop_operation_xyz 'x,y,z' 'x,1/2+y,1/2+z' '1/2+x,y,1/2+z' '1/2+x,1/2+y,z' '-x,-y,z' '-x,1/2-y,1/2+z' '1/2-x,-y,1/2+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 _atom_site_U_iso_or_equiv Na1 0.06200 0.18280 0.13220 0.94000 0.09400 Na2 0.31100 0.06260 0.32920 0.47000 0.06600 Na21 0.28710 0.07280 0.39880 0.47000 0.07100 Al11 0.02641 0.10551 0.60500 0.90300 0.02880 Al12 0.26764 0.14240 0.86130 0.90800 0.03030 Si11 0.00000 0.00000 -0.01031 0.90800 0.03160 Si12 0.25000 0.25000 0.24080 0.92400 0.03040 Si21 0.13714 0.23497 0.61510 0.90700 0.02930 Si22 0.11042 -0.02143 0.36170 0.90700 0.02790 O11 0.04130 0.07010 0.85960 1.00000 0.04930 O12 0.23590 0.17110 0.11000 1.00000 0.04200 O21 0.04120 0.20840 0.59540 1.00000 0.04340 O22 0.20830 -0.04160 0.34820 1.00000 0.03960 O31 0.09050 0.06990 0.40520 1.00000 0.04790 O32 0.14650 0.30330 0.78300 1.00000 0.04980 O41 0.07240 -0.07570 0.54400 1.00000 0.04760 O42 0.19160 0.15930 0.67960 1.00000 0.05400 O51 0.07210 -0.04140 0.13170 1.00000 0.04620 O52 0.16880 0.26500 0.38650 1.00000 0.04530