data_global _chemical_name_mineral 'Cancrinite' loop_ _publ_author_name 'Pekov I V' 'Olysych L V' 'Chukanov N V' 'Zubkova N V' 'Pushcharovsky D Yu' 'Van K V' 'Giester G' 'Tillmanns E' _journal_name_full 'The Canadian Mineralogist' _journal_volume 49 _journal_year 2012 _journal_page_first 1129 _journal_page_last 1150 _publ_section_title ; Crystal chemistry of cancrinite-group minerals with an AB-type framework: A review and new data. I. Chemical and structural variations Note: Sample# tz5/1 ; _database_code_amcsd 0018872 _chemical_compound_source 'Tamazeght' _chemical_formula_sum 'Si3.24 Al2.76 O15.162 Na3.31 Ca.45 C.721 H1.998' _cell_length_a 12.618 _cell_length_b 12.618 _cell_length_c 5.144 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 120 _cell_volume 709.272 _exptl_crystal_density_diffrn 2.401 _symmetry_space_group_name_H-M 'P 63' loop_ _space_group_symop_operation_xyz 'x,y,z' 'x-y,x,1/2+z' '-y,x-y,z' '-x,-y,1/2+z' '-x+y,-x,z' 'y,-x+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 Si1 0.32849 0.41087 0.75000 1.00000 0.00881 Al2 0.07534 0.41255 0.75090 0.92000 0.00886 Si2 0.07534 0.41255 0.75090 0.08000 0.00886 O1 0.20368 0.40528 0.66290 1.00000 0.01590 O2 0.11412 0.56335 0.72830 1.00000 0.02140 O3 0.02878 0.35060 0.05820 1.00000 0.01710 O4 0.31591 0.35760 0.04220 1.00000 0.01780 Na 0.66670 0.33330 0.13110 1.00000 0.04220 Wat 0.69700 0.37800 0.69050 0.33300 0.07300 NaA 0.12555 0.25371 0.29550 0.77000 0.02950 CaA 0.12555 0.25371 0.29550 0.15000 0.02950 C1 0.00000 0.00000 0.64400 0.28900 0.01900 OC1 0.05750 0.11780 0.64400 0.28900 0.02400 C2 0.00000 0.00000 0.93600 0.27200 0.02900 OC2 0.05220 0.11680 0.93600 0.27200 0.06700 C4 0.00000 0.00000 0.76200 0.16000 0.01600 OC4 0.05890 0.11700 0.76200 0.16000 0.02400