data_global
_chemical_name_mineral 'Hedenbergite'
loop_
_publ_author_name
'Nestola F'
'Ballaran T B'
'Liebske C'
'Thompson R'
'Downs R T'
_journal_name_full 'American Mineralogist'
_journal_volume 93 
_journal_year 2008
_journal_page_first 1005
_journal_page_last 1013
_publ_section_title
;
 The effect of the hedenbergitic substitution on the compressibility
 of jadeite
 Sample: Jd24Hd76, P = 8.76 GPa
;
_database_code_amcsd 0004607
_chemical_compound_source 'Synthetic'
_chemical_formula_sum '(Na.24 Ca.76) (Al.24 Fe.76) Si2 O6'
_cell_length_a 9.5525
_cell_length_b 8.6648
_cell_length_c 5.1550
_cell_angle_alpha 90
_cell_angle_beta 104.972
_cell_angle_gamma 90
_cell_volume 412.197
_exptl_crystal_density_diffrn      3.820
_symmetry_space_group_name_H-M 'C 1 2/c 1'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '1/2+x,1/2+y,z'
  'x,-y,1/2+z'
  '1/2+x,1/2-y,1/2+z'
  '-x,y,1/2-z'
  '1/2-x,1/2+y,1/2-z'
  '-x,-y,-z'
  '1/2-x,1/2-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
NaM2   0.00000   0.30500   0.25000   0.24000   0.01200
CaM2   0.00000   0.30500   0.25000   0.76000   0.01200
AlM1   0.00000   0.90800   0.25000   0.24000   0.00700
Fe2+M1   0.00000   0.90800   0.25000   0.76000   0.00700
SiT   0.28830   0.09460   0.23090   1.00000   0.01200
O1   0.11550   0.08900   0.14600   1.00000   0.01400
O2   0.35900   0.25830   0.32300   1.00000   0.02100
O3   0.35500   0.02300   0.98900   1.00000   0.01100