data_global
_chemical_name_mineral 'Stoppaniite'
loop_
_publ_author_name
'Ferraris G'
'Prencipe M'
'Rossi P'
_journal_name_full 'European Journal of Mineralogy'
_journal_volume 10 
_journal_year 1998
_journal_page_first 491
_journal_page_last 496
_publ_section_title
;
 Stoppaniite, a new member of the beryl group: crystal structure
 and crystal-chemical implications
;
_database_code_amcsd 0006751
_chemical_formula_sum '(Fe1.22 Al.42 Mg.36) (Be3 Si6) Na.55 (O19 H2)'
_cell_length_a 9.397
_cell_length_b 9.397
_cell_length_c 9.202
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 120
_cell_volume 703.706
_exptl_crystal_density_diffrn      2.843
_symmetry_space_group_name_H-M 'P 6/m c c'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '-x,-x+y,1/2+z'
  'x,x-y,1/2-z'
  '-x+y,-x,-z'
  'x-y,x,z'
  '-y,-x,1/2+z'
  'y,x,1/2-z'
  'y,-x+y,-z'
  '-y,x-y,z'
  'x-y,-y,1/2+z'
  '-x+y,y,1/2-z'
  'x,y,-z'
  '-x,-y,z'
  'x,x-y,1/2+z'
  '-x,-x+y,1/2-z'
  'x-y,x,-z'
  '-x+y,-x,z'
  'y,x,1/2+z'
  '-y,-x,1/2-z'
  '-y,x-y,-z'
  'y,-x+y,z'
  '-x+y,y,1/2+z'
  'x-y,-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
FeM   0.33333   0.66667   0.25000   0.61000   0.01300
AlM   0.33333   0.66667   0.25000   0.21000   0.01300
MgM   0.33333   0.66667   0.25000   0.18000   0.01300
BeT*   0.50000   0.00000   0.25000   0.66667   0.01300
SiT*   0.50000   0.00000   0.25000   0.33333   0.01300
BeT*   0.37990   0.10690   0.00000   0.16667   0.01200
SiT*   0.37990   0.10690   0.00000   0.83333   0.01200
NaA*   0.00000   0.00000   0.00000   0.55000   0.03800
WatA*   0.00000   0.00000   0.25000   1.00000   0.05700
O1   0.30050   0.22560   0.00000   1.00000   0.01800
O2   0.48900   0.13530   0.14700   1.00000   0.02200