data_global
_chemical_name_mineral 'Tremolite'
loop_
_publ_author_name
'Sueno S'
'Cameron M'
'Papike J J'
'Prewitt C T'
_journal_name_full 'American Mineralogist'
_journal_volume 58 
_journal_year 1973
_journal_page_first 649
_journal_page_last 664
_publ_section_title
;
 The high temperature crystal chemistry of tremolite
 T = 700 C
;
_database_code_amcsd 0000369
_chemical_formula_sum 'Si8 Mg5 Ca2 O24 H2'
_cell_length_a 9.898
_cell_length_b 18.19
_cell_length_c 5.296
_cell_angle_alpha 90
_cell_angle_beta 104.46
_cell_angle_gamma 90
_cell_volume 923.311
_exptl_crystal_density_diffrn      2.922
_symmetry_space_group_name_H-M 'C 1 2/m 1'
loop_
_space_group_symop_operation_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
Si1   0.27910   0.08370   0.29450
Si2   0.28800   0.17020   0.80270
Mg1   0.00000   0.08780   0.50000
Mg2   0.00000   0.17760   0.00000
Mg3   0.00000   0.00000   0.00000
Ca4   0.00000   0.27780   0.50000
O1   0.11180   0.08630   0.21750
O2   0.11980   0.17130   0.72350
O-H3   0.11060   0.00000   0.71790
O4   0.36620   0.24610   0.79580
O5   0.34410   0.13160   0.09360
O6   0.34200   0.11940   0.58200
O7   0.33490   0.00000   0.29570
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
Si1 0.01457 0.00939 0.01848 -0.00141 0.00787 -0.00009
Si2 0.01475 0.01157 0.01783 -0.00256 0.00852 -0.00066
Mg1 0.02164 0.01492 0.01915 0.00000 0.01096 0.00000
Mg2 0.02090 0.01391 0.02089 0.00000 0.01103 0.00000
Mg3 0.02364 0.01391 0.01537 0.00000 0.00931 0.00000
Ca4 0.03704 0.01877 0.04101 0.00000 0.02821 0.00000
O1 0.01820 0.01693 0.02292 -0.00053 0.00832 -0.00066
O2 0.01866 0.01894 0.02190 0.00071 0.00879 -0.00095
O-H3 0.03034 0.01693 0.02473 0.00000 0.01457 0.00000
O4 0.03211 0.01576 0.03332 -0.00848 0.01616 -0.00378
O5 0.02411 0.02598 0.02369 -0.00062 0.01078 0.00789
O6 0.02187 0.02632 0.02142 0.00159 0.00627 -0.00695
O7 0.02769 0.00754 0.04944 0.00000 0.01292 0.00000