data_global _chemical_name_mineral 'Phengite-3T' loop_ _publ_author_name 'Ivaldi G' 'Ferraris G' 'Curetti N' 'Compagnoni R' _journal_name_full 'European Journal of Mineralogy' _journal_volume 13 _journal_year 2001 _journal_page_first 1025 _journal_page_last 1034 _publ_section_title ; Coexisting 3T and 2M_1 polytypes of phengite from Cima Pal (Val Savenca, western Alps): Chemical and polytypic zoning and structural characterisation Sample: 3TY ; _database_code_amcsd 0006912 _chemical_compound_source 'Cima Pal, Val Savenca, western Alps' _chemical_formula_sum 'K.9 Na.05 Al2.11 Mg.32 Fe.18 Ti.03 Si3.4 O12 H2' _cell_length_a 5.220 _cell_length_b 5.220 _cell_length_c 29.762 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 120 _cell_volume 702.318 _exptl_crystal_density_diffrn 2.852 _symmetry_space_group_name_H-M 'P 31 1 2' loop_ _space_group_symop_operation_xyz 'x,y,z' '-x+y,y,1/3-z' '-y,x-y,1/3+z' '-y,-x,2/3-z' '-x+y,-x,2/3+z' 'x,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 KI 0.12810 0.25620 0.16667 0.90000 0.02540 NaI 0.12810 0.25620 0.16667 0.05000 0.02540 AlM2 0.79690 0.89840 0.00000 0.75500 0.01010 MgM2 0.79690 0.89840 0.00000 0.16000 0.01010 FeM2 0.79690 0.89840 0.00000 0.09000 0.01010 TiM2 0.79690 0.89840 0.00000 0.01500 0.01010 AlM3 0.45590 0.22800 0.00000 0.75500 0.01080 MgM3 0.45590 0.22800 0.00000 0.16000 0.01080 FeM3 0.45590 0.22800 0.00000 0.09000 0.01080 TiM3 0.45590 0.22800 0.00000 0.01500 0.01080 SiT1 0.78630 0.58130 0.09037 0.85000 0.00860 AlT1 0.78630 0.58130 0.09037 0.15000 0.00860 SiT2 0.46810 0.92160 0.09037 0.85000 0.00940 AlT2 0.46810 0.92160 0.09037 0.15000 0.00940 O1 0.65700 0.77970 0.11310 1.00000 0.01670 O2 0.12740 0.71330 0.10710 1.00000 0.01860 O3 0.59670 0.25030 0.11270 1.00000 0.01680 O4 0.75120 0.56740 0.03600 1.00000 0.01370 O5 0.50330 0.94120 0.03610 1.00000 0.01370 O6 0.12450 0.19080 0.03480 1.00000 0.01460 H 0.14000 0.32000 0.03800 1.00000 0.07000