data_global
_chemical_name_mineral 'Clinoptilolite-Ca'
loop_
_publ_author_name
'Cappelletti P'
'Langella A'
'Cruciani G'
_journal_name_full 'European Journal of Mineralogy'
_journal_volume 11 
_journal_year 1999
_journal_page_first 1051
_journal_page_last 1060
_publ_section_title
;
 Crystal-chemistry and synchrotron Rietveld refinement
 of two different clinoptilolites from volcanoclastites
 of North-Western Sardinia
 Sample: LAC1
;
_database_code_amcsd 0006812
_chemical_compound_source 'volcanoclastites of North-Western Sardinia'
_chemical_formula_sum 'Na.66 Ca.86 K.64 Mg.26 Si18 O49.42 H26.84'
_cell_length_a 17.6750
_cell_length_b 17.9572
_cell_length_c 7.4091
_cell_angle_alpha 90
_cell_angle_beta 116.304
_cell_angle_gamma 90
_cell_volume 2108.105
_exptl_crystal_density_diffrn      2.212
_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
_atom_site_occupancy
_atom_site_U_iso_or_equiv
Na1   0.13800   0.00000   0.69200   0.33000   0.05000
Ca2   0.04700   0.50000   0.19600   0.43000   0.07000
K3   0.24200   0.50000   0.04100   0.32000   0.03000
Mg4   0.00000   0.00000   0.50000   0.26000   0.06000
Si1   0.17830   0.17040   0.09820   1.00000   0.01000
Si2   0.21190   0.41180   0.50600   1.00000   0.02000
Si3   0.20980   0.19140   0.71030   1.00000   0.02000
Si4   0.06860   0.29980   0.41920   1.00000   0.01000
Si5   0.00000   0.21850   0.00000   1.00000   0.01000
O1   0.19410   0.50000   0.45970   1.00000   0.02000
O2   0.23160   0.12420   0.60190   1.00000   0.02000
O3   0.18420   0.15750   0.88190   1.00000   0.03000
O4   0.23230   0.10460   0.24930   1.00000   0.03000
O5   0.00000   0.32750   0.50000   1.00000   0.03000
O6   0.07850   0.15990   0.05990   1.00000   0.01000
O7   0.12650   0.23420   0.55730   1.00000   0.03000
O8   0.01140   0.27690   0.18300   1.00000   0.01000
O9   0.21130   0.25260   0.18430   1.00000   0.02000
O10   0.11690   0.37640   0.42140   1.00000   0.02000
Wat1   0.32100   0.00000   0.07300   0.68000   0.12000
Wat2   0.13100   0.00000   0.92600   0.30000   0.07000
Wat3   0.08100   0.41400   0.96100   1.00000   0.11000
Wat4   0.50000   0.00000   0.50000   1.00000   0.03000
Wat5   0.01600   0.09600   0.41400   0.50000   0.07000
Wat6   0.09100   0.00000   0.31600   0.50000   0.20000
Wat7   0.08500   0.00000   0.70400   0.50000   0.12000
Wat8   0.05100   0.00000   0.09900   0.49000   0.15000
Wat9   0.14900   0.00000   0.62400   0.48000   0.17000
Wat10   0.00800   0.00000   0.75300   0.26000   0.13000