data_9001225
_chemical_name 'Hornblende'
loop_
_publ_author_name
'Phillips M W'
'Draheim J E'
'Popp R K'
'Clowe C A'
'Pinkerton A A'
_journal_name_full "American Mineralogist"
_journal_volume 74
_journal_year 1989
_journal_page_first 764
_journal_page_last 773
_publ_section_title
;
 Effects of oxidation-dehydrogenation in tschermakitic hornblende
 sample H-1, natural
;
_chemical_formula_sum 'Al2.42 Si6.44 Fe1.846 Mg2.224 Ti.07 Ca1.802 Na.628 O24 H2
_cell_length_a 9.813
_cell_length_b 18.055
_cell_length_c 5.321
_cell_angle_alpha 90
_cell_angle_beta 104.97
_cell_angle_gamma 90
_cell_volume 910.746
_symmetry_space_group_name_H-M 'C 1 2/m 1'
loop_
_symmetry_equiv_pos_as_xyz
  'x,y,z'
  '1/2+x,1/2+y,z'
  'x,-y,z'
  '1/2+x,1/2-y,z'
  '-x,y,-z'
  '1/2-x,1/2+y,-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_Uiso_or_equiv
Al1   0.28020   0.08606   0.30109   0.39000 ?
Si1   0.28020   0.08606   0.30109   0.61000 ?
Si2   0.29168   0.17334   0.81442   1.00000 ?
Fe1   0.00000   0.08972   0.50000   0.41500 ?
Mg1   0.00000   0.08972   0.50000   0.58500 ?
Fe2   0.00000   0.17782   0.00000   0.21400 ?
Mg2   0.00000   0.17782   0.00000   0.32100 ?
Al2   0.00000   0.17782   0.00000   0.43000 ?
Ti2   0.00000   0.17782   0.00000   0.03500 ?
Fe3   0.00000   0.00000   0.00000   0.58800 ?
Mg3   0.00000   0.00000   0.00000   0.41200 ?
Ca4   0.00000   0.28038   0.50000   0.90100 ?
Na4   0.00000   0.28038   0.50000   0.09900 ?
O1   0.10570   0.09200   0.21160   1.00000 ?
O2   0.11950   0.17530   0.73850   1.00000 ?
O3   0.11080   0.00000   0.71150   1.00000 ?
O4   0.36960   0.25050   0.79430   1.00000 ?
O5   0.35060   0.13940   0.10930   1.00000 ?
O6   0.34210   0.11980   0.60200   1.00000 ?
O7   0.33330   0.00000   0.28600   1.00000 ?
Na2/m   0.00000   0.50000   0.00000   0.43000 ?
H   0.32500   0.50000   0.24500   1.00000   0.00633