data_global
_chemical_name_mineral 'Mountainite'
loop_
_publ_author_name
'Zubkova N V'
'Pekov I V'
'Pushcharovsky D Y'
'Chukanov N V'
_journal_name_full 'Zeitschrift fur Kristallographie'
_journal_volume 224 
_journal_year 2009
_journal_page_first 389
_journal_page_last 396
_publ_section_title
;
 The crystal structure and refined formula of mountainite, KNa2Ca2[Si8O19(OH)]*6H2O
;
_database_code_amcsd 0011131
_chemical_compound_source 'Yubileinaya pegmatite, Lovozero alkaline complex, Kola Peninsula, Russia'
_chemical_formula_sum 'K Na2 Ca2 Si8 O26 H13'
_cell_length_a 13.704
_cell_length_b 6.5760
_cell_length_c 13.751
_cell_angle_alpha 90
_cell_angle_beta 105.752
_cell_angle_gamma 90
_cell_volume 1192.668
_exptl_crystal_density_diffrn      2.281
_symmetry_space_group_name_H-M 'P 1 2/c 1'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  'x,-y,1/2+z'
  '-x,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_occupancy
_atom_site_U_iso_or_equiv
K   0.00000   0.27580   0.25000   1.00000   0.02920
Na1   0.45000   0.84660   0.58170   0.50000   0.04300
Na2   0.43170   0.70750   0.44120   0.50000   0.03000
Ca   0.01912   0.24440   0.56031   1.00000   0.01290
Si1   0.33509   0.22350   0.64951   1.00000   0.01170
Si2   0.21930   0.46900   0.76350   1.00000   0.01090
Si3   0.20420   0.16380   0.12840   1.00000   0.01180
Si4   0.20960   0.50420   0.98330   1.00000   0.01200
O1   0.79580   0.29400   0.26960   1.00000   0.02200
O2   0.11920   0.34370   0.71390   1.00000   0.01800
O3   0.31960   0.38180   0.73490   1.00000   0.01800
O4   0.90340   0.07680   0.42650   1.00000   0.02250
O5   0.27240   0.29750   0.53830   1.00000   0.02000
O6   0.25430   0.47030   0.88600   1.00000   0.01600
O7   0.74950   0.30640   0.44410   1.00000   0.01700
O8   0.29300   0.00550   0.67340   1.00000   0.02100
O9   0.45340   0.20510   0.65830   0.50000   0.02200
O-H9   0.45340   0.20510   0.65830   0.50000   0.02200
O10   0.09090   0.46340   0.46030   1.00000   0.01800
Wat11   0.90940   0.08370   0.65120   1.00000   0.02300
Wat12   0.50000   0.68500   0.75000   1.00000   0.07500
Wat13   0.47470   0.57300   0.46910   0.50000   0.03800
Wat14   0.36000   0.05000   0.39730   0.50000   0.04200
Wat15   0.54880   0.93800   0.56800   0.50000   0.05500