data_global
_chemical_name_mineral 'Junitoite'
loop_
_publ_author_name
'Hamilton R D'
'Finney J J'
_journal_name_full 'Mineralogical Magazine'
_journal_volume 49 
_journal_year 1985
_journal_page_first 91
_journal_page_last 95
_publ_section_title
;
 The structure of junitoite, CaZn2Si2O7*H2O
;
_database_code_amcsd 0014480
_chemical_compound_source 'Christmas mine, Gile County, Arizona, USA'
_chemical_formula_sum 'Ca Zn2 Si2 O8 H2'
_cell_length_a 12.510
_cell_length_b 6.318
_cell_length_c 8.561
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 676.646
_exptl_crystal_density_diffrn      3.505
_symmetry_space_group_name_H-M 'A m a 2'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  'x,1/2+y,1/2+z'
  '1/2+x,-y,z'
  '1/2+x,1/2-y,1/2+z'
  '1/2-x,y,z'
  '1/2-x,1/2+y,1/2+z'
  '-x,-y,z'
  '-x,1/2-y,1/2+z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_U_iso_or_equiv
Ca   0.25000   0.24620   0.11190   0.00507
Zn1   0.00000   0.00000   0.00000   0.01558
Zn2   0.00000   0.00000   0.49630   0.00190
Si   0.13160   0.73480   0.23590   0.00405
O1   0.04370   0.74380   0.37640   0.00912
O2   0.12130   0.53140   0.13600   0.01393
O3   0.12630   0.95170   0.12490   0.01532
O4   0.25000   0.77210   0.32700   0.00583
Wat   0.25000   0.27460   0.37850   0.04078