data_global _chemical_name_mineral 'Muscovite' loop_ _publ_author_name 'Liang J' 'Hawthorne F C' 'Swainson I P' _journal_name_full 'The Canadian Mineralogist' _journal_volume 36 _journal_year 1998 _journal_page_first 1017 _journal_page_last 1027 _publ_section_title ; Triclinic muscovite: X-ray diffraction, neutron diffraction and photo-acoustic FTIR spectroscopy Sample: T = 12 K ; _database_code_amcsd 0005550 _chemical_formula_sum 'Al2.88 Fe.02 Mn.02 Si3.08 (K.89 Na.1 Rb.01) H4 O12' _cell_length_a 5.1628 _cell_length_b 8.962 _cell_length_c 19.977 _cell_angle_alpha 90 _cell_angle_beta 95.738 _cell_angle_gamma 90 _cell_volume 919.685 _exptl_crystal_density_diffrn 2.892 _symmetry_space_group_name_H-M 'C 1 2/c 1' loop_ _space_group_symop_operation_xyz 'x,y,z' '1/2+x,1/2+y,z' 'x,-y,1/2+z' '1/2+x,1/2-y,1/2+z' '-x,y,1/2-z' '1/2-x,1/2+y,1/2-z' '-x,-y,-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 Al 0.26400 0.08200 0.00100 0.98000 Fe 0.26400 0.08200 0.00100 0.01000 Mn 0.26400 0.08200 0.00100 0.01000 SiT1 0.46400 0.93000 0.13700 0.77000 AlT1 0.46400 0.93000 0.13700 0.23000 SiT2 0.44900 0.26100 0.13400 0.77000 AlT2 0.44900 0.26100 0.13400 0.23000 K 0.00000 0.09200 0.25000 0.89000 Na 0.00000 0.09200 0.25000 0.10000 Rb 0.00000 0.09200 0.25000 0.01000 H1 0.39200 0.66800 0.05200 1.00000 H2 0.40200 0.63200 0.08800 1.00000 O1 0.40600 0.09100 0.16700 1.00000 O2 0.25300 0.80100 0.15700 1.00000 O3 0.24700 0.36800 0.16700 1.00000 O4 0.45700 0.94900 0.05200 1.00000 O5 0.38200 0.25300 0.05400 1.00000 O-h 0.46000 0.56000 0.05000 1.00000