data_global
_chemical_name_mineral 'Cryptophyllite'
loop_
_publ_author_name
'Zubkova N V'
'Filinchuk Y E'
'Pekov I V'
'Pushcharovsky D Y'
'Gobechiya E R'
_journal_name_full 'European Journal of Mineralogy'
_journal_volume 22 
_journal_year 2010
_journal_page_first 547
_journal_page_last 555
_publ_section_title
;
 Crystal structures of shlykovite and cryptophyllite: comparative crystal
 chemistry of phyllosilicate minerals of the mountainite family
;
_database_code_amcsd 0017557
_chemical_compound_source 'Mount Rasvumchorr, Khibiny alkaline intrusion, Kola Peninsula, Russia'
_chemical_formula_sum 'K2 Ca Si4 O15 H10'
_cell_length_a 6.4934
_cell_length_b 6.9919
_cell_length_c 32.087
_cell_angle_alpha 90
_cell_angle_beta 94.680
_cell_angle_gamma 90
_cell_volume 1451.932
_exptl_crystal_density_diffrn      2.199
_symmetry_space_group_name_H-M 'P 1 21/n 1'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '1/2+x,1/2-y,1/2+z'
  '1/2-x,1/2+y,1/2-z'
  '-x,-y,-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_U_iso_or_equiv
K1  -0.07730   0.37570   0.14911   0.02670
K2   0.46420   0.36550   0.05485   0.04580
Ca   0.22750   0.84690   0.24478   0.01010
Si1   0.41660   0.13500   0.16108   0.00970
Si2   0.41560   0.57470   0.16335   0.00910
Si3  -0.21520   0.85680   0.17356   0.01010
Si4   0.14020   0.85390   0.11015   0.01020
O1   0.28200   0.57980   0.20226   0.01340
O2   0.45570   0.35560   0.14722   0.01410
O3   0.33990   0.10970   0.20594   0.01710
O4   0.06130   0.85220   0.06211   0.01680
O5   0.30510   0.68370   0.12212   0.01920
O6  -0.10770   0.90490   0.21850   0.01410
O7   0.64640   0.66110   0.17274   0.02020
O8  -0.05130   0.81940   0.13918   0.02210
O9   0.25180   0.05580   0.12330   0.02060
O10  -0.36360   0.03010   0.15437   0.01400
Wat1   0.59130   0.79090   0.26910   0.02030
Wat2  -0.33970   0.00700   0.06290   0.06400
Wat3   0.40710   0.71980   0.02280   0.04700
Wat4   0.11150   0.20500   0.02240   0.03500
Wat5  -0.12360   0.47150   0.06530   0.03600