data_9003098
_chemical_name 'Indialite'
loop_
_publ_author_name
'Balassone G'
'Franco E'
'Mattia C A'
'Puliti R'
_journal_name_full "American Mineralogist"
_journal_volume 89
_journal_year 2004
_journal_page_first 1
_journal_page_last 6
_publ_section_title
;
 Indialite in xenolithic rocks from Somma-Vesuvius volcano (Southern Italy):
 Crystal chemistry and petrogenetic features
;
_chemical_formula_sum '(Al4.251 Si4.749) (Mg1.94 Fe.06) O18 K.336 Ca.084'
_cell_length_a 9.775
_cell_length_b 9.775
_cell_length_c 9.354
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 120
_cell_volume 774.037
_symmetry_space_group_name_H-M 'P 6/m c c'
loop_
_symmetry_equiv_pos_as_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_Uiso_or_equiv
Al1   0.50000   0.50000   0.25000   0.91700   0.01393
Si1   0.50000   0.50000   0.25000   0.08300   0.01393
Al2   0.37340   0.26650   0.00000   0.25000   0.01684
Si2   0.37340   0.26650   0.00000   0.75000   0.01684
Mg   0.33333   0.66667   0.25000   0.97000   0.01773
Fe   0.33333   0.66667   0.25000   0.03000   0.01773
O1   0.48510   0.34940   0.14440   1.00000   0.02026
O2   0.23060   0.30810   0.00000   1.00000   0.03128
K   0.00000   0.00000   0.16200   0.16800   0.11399
Ca   0.00000   0.00000   0.16200   0.04200   0.11399