data_global
_chemical_name_mineral 'Polylithionite'
loop_
_publ_author_name
'Sartori F'
_journal_name_full 'Tschermaks Mineralogische und Petrographische Mitteilungen'
_journal_volume 24 
_journal_year 1977
_journal_page_first 23
_journal_page_last 37
_publ_section_title
;
 The crystal structure of a 2M_1 lepidolite
 Note: This sample is about halfway along the trilithionite-polylithionite join
 Note: Lepidolite series
;
_database_code_amcsd 0015663
_chemical_compound_source 'Biskupice, Moravia, Czech Republic'
_chemical_formula_sum 'K.775 Rb.06 Cs.02 Na.035 Ca.01 H.585 Li1.61 Al1.59 Mg.066 Mn.05 Fe.024 Si3.58 O10.485 F1.515'
_cell_length_a 5.209
_cell_length_b 9.053
_cell_length_c 20.185
_cell_angle_alpha 90
_cell_angle_beta 99.125
_cell_angle_gamma 90
_cell_volume 939.820
_exptl_crystal_density_diffrn      2.804
_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
_atom_site_U_iso_or_equiv
K   0.00000   0.09060   0.25000   0.77500   0.01494
Rb   0.00000   0.09060   0.25000   0.06000   0.01494
Cs   0.00000   0.09060   0.25000   0.02000   0.01494
Na   0.00000   0.09060   0.25000   0.03500   0.01494
Ca   0.00000   0.09060   0.25000   0.01000   0.01494
H3O   0.00000   0.09060   0.25000   0.10000   0.01494
LiM2   0.25000   0.75000   0.00000   0.92000   0.01241
AlM1   0.25500   0.08510   0.00010   0.58500   0.00849
LiM1   0.25500   0.08510   0.00010   0.34500   0.00849
MgM1   0.25500   0.08510   0.00010   0.03300   0.00849
MnM1   0.25500   0.08510   0.00010   0.02500   0.00849
FeM1   0.25500   0.08510   0.00010   0.01200   0.00849
SiT1   0.46140   0.92440   0.13400   0.85000   0.00291
AlT1   0.46140   0.92440   0.13400   0.15000   0.00291
SiT2   0.45580   0.25540   0.13410   0.94000   0.00304
AlT2   0.45580   0.25540   0.13410   0.06000   0.00304
O1   0.44170   0.92810   0.05240   1.00000   0.00950
O2   0.41530   0.25170   0.05290   1.00000   0.01140
O3   0.43960   0.08980   0.16580   1.00000   0.00988
O4   0.23530   0.82170   0.16290   1.00000   0.01343
O5   0.23940   0.35460   0.16700   1.00000   0.01292
O-H   0.44350   0.57010   0.04980   0.24250   0.01659
F   0.44350   0.57010   0.04980   0.75750   0.01659