data_global
_chemical_name_mineral 'Sverigeite'
loop_
_publ_author_name
'Rouse R C'
'Peacor D R'
'Metz G W'
_journal_name_full 'American Mineralogist'
_journal_volume 74 
_journal_year 1989
_journal_page_first 1343
_journal_page_last 1350
_publ_section_title
;
 Sverigeite, a structure containing planar NaO4 groups and chains of 3- and
 4-membered beryllosilicate rings
;
_database_code_amcsd 0001282
_chemical_formula_sum 'Sn (Mn1.37 Mg.63) Na Si3 Be2 O13 H'
_cell_length_a 10.815
_cell_length_b 13.273
_cell_length_c 6.818
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 978.707
_exptl_crystal_density_diffrn      3.689
_symmetry_space_group_name_H-M 'I m m a'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '1/2+x,1/2+y,1/2+z'
  'x,1/2-y,z'
  '1/2+x,-y,1/2+z'
  '-x,1/2+y,-z'
  '1/2-x,+y,1/2-z'
  '-x,y,z'
  '1/2-x,1/2+y,1/2+z'
  'x,-y,-z'
  '1/2+x,1/2-y,1/2-z'
  'x,1/2+y,-z'
  '1/2+x,+y,1/2-z'
  '-x,1/2-y,z'
  '1/2-x,-y,1/2+z'
  '-x,-y,-z'
  '1/2-x,1/2-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
Sn   0.00000   0.00000   0.00000   1.00000 ?
Mn1   0.25000   0.62910   0.25000   0.68500 ?
Mg1   0.25000   0.62910   0.25000   0.31500 ?
Na   0.00000   0.00000   0.50000   1.00000 ?
Si1   0.00000   0.25000   0.86060   1.00000 ?
Si2   0.25000   0.08320   0.25000   1.00000 ?
Be   0.63530   0.25000   0.02620   1.00000   0.00510
O1   0.78550   0.14790   0.44210   1.00000   0.00950
O2   0.86640   0.00210   0.21300   1.00000   0.00820
O3   0.12130   0.25000   0.72110   1.00000   0.00470
O4   0.00000   0.35010   0.99320   1.00000   0.01290
O-H5   0.00000   0.25000   0.38340   1.00000   0.01800
loop_
_atom_site_aniso_label
_atom_site_aniso_U_11
_atom_site_aniso_U_22
_atom_site_aniso_U_33
_atom_site_aniso_U_12
_atom_site_aniso_U_13
_atom_site_aniso_U_23
Sn 0.00400 0.00690 0.00230 0.00000 0.00000 0.00040
Mn1 0.00850 0.00710 0.00630 0.00000 0.00080 0.00000
Mg1 0.00850 0.00710 0.00630 0.00000 0.00080 0.00000
Na 0.03980 0.14530 0.01390 0.00000 0.00000 -0.01240
Si1 0.00030 0.00910 0.00270 0.00000 0.00000 0.00000
Si2 0.00340 0.00770 0.00260 0.00000 0.00090 0.00000