data_global
_chemical_name_mineral 'Natrolite'
loop_
_publ_author_name
'Seryotkin Y V'
'Bakakin V V'
'Fursenko B A'
'Belitsky I A'
'Joswig W'
'Radaelli P G'
_journal_name_full 'European Journal of Mineralogy'
_journal_volume 17 
_journal_year 2005
_journal_page_first 305
_journal_page_last 313
_publ_section_title
;
 Structural evolution of natrolite during over-hydration: a high-pressure
 neutron diffraction study
 Note: Zeolite
 Sample: Khibiny massif, Kola Peninsula, Russia; P = .9 GPa
;
_database_code_amcsd 0007098
_chemical_formula_sum '(Na1.92 Mg.06 Ca.02) Al2 Si3 O11.84 D2.96'
_cell_length_a 18.2126
_cell_length_b 18.5695
_cell_length_c 6.5741
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 2223.353
_exptl_crystal_density_diffrn      2.271
_symmetry_space_group_name_H-M 'F d d 2'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  'x,1/2+y,1/2+z'
  '1/2+x,y,1/2+z'
  '1/2+x,1/2+y,z'
  '1/4+x,1/4-y,1/4+z'
  '1/4+x,3/4-y,3/4+z'
  '3/4+x,1/4-y,3/4+z'
  '3/4+x,3/4-y,1/4+z'
  '1/4-x,1/4+y,1/4+z'
  '1/4-x,3/4+y,3/4+z'
  '3/4-x,1/4+y,3/4+z'
  '3/4-x,3/4+y,1/4+z'
  '-x,1/2-y,1/2+z'
  '-x,-y,+z'
  '1/2-x,1/2-y,+z'
  '1/2-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
Na  -0.02540   0.21620   0.38900   0.96000   0.01900
Mg  -0.02540   0.21620   0.38900   0.03000   0.01900
Ca  -0.02540   0.21620   0.38900   0.01000   0.01900
Al   0.03440   0.09400   0.60900   1.00000   0.00800
Si1   0.00000   0.00000   0.00000   1.00000   0.00700
Si2  -0.09850   0.03700   0.36500   1.00000   0.00300
O1   0.02290   0.06870   0.86600   1.00000   0.00700
O2   0.06950   0.18230   0.61200   1.00000   0.00300
O3   0.09840   0.03530   0.49700   1.00000   0.01800
O4  -0.04760   0.09710   0.46800   1.00000   0.01000
O5  -0.06870   0.02380   0.13700   1.00000   0.03700
Ow6   0.05570   0.19160   0.11100   0.74000   0.01500
D61   0.05200   0.14720   0.05800   0.74000   0.01500
D62   0.10650   0.19010   0.17800   0.74000   0.01500
Ow7*   0.11800   0.35400   0.39900   0.18000   0.01300