data_global
_chemical_name_mineral 'Quadridavyne'
loop_
_publ_author_name
'Bonaccorsi E'
'Merlino S'
'Orlandi P'
'Pasero M'
'Vezzalini G'
_journal_name_full 'European Journal of Mineralogy'
_journal_volume 6 
_journal_year 1994
_journal_page_first 481
_journal_page_last 487
_publ_section_title
;
 Quadridavyne, [(Na,K)6Cl2][Ca2Cl2][Si6Al6O24], a new feldspathoid
 mineral from Vesuvius area
 Note: Cl1 y-coordinate altered
;
_database_code_amcsd 0006545
_chemical_compound_source 'Vesuvius, Italy'
_chemical_formula_sum 'Na8.16 K3.84 Si12 Al12 O48 Ca4 Cl8'
_cell_length_a 25.771
_cell_length_b 25.771
_cell_length_c 5.371
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 120
_cell_volume 3089.216
_exptl_crystal_density_diffrn      2.376
_symmetry_space_group_name_H-M 'P 63/m'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '-x+y,-x,1/2-z'
  'x-y,x,1/2+z'
  'y,-x+y,-z'
  '-y,x-y,z'
  'x,y,1/2-z'
  '-x,-y,1/2+z'
  'x-y,x,-z'
  '-x+y,-x,z'
  '-y,x-y,1/2-z'
  'y,-x+y,1/2+z'
  '-x,-y,-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_occupancy
Naint(ab)   0.05200   0.10600   0.25000   0.28000
Kint(ab)   0.05200   0.10600   0.25000   0.10000
Namid(ab)   0.06800   0.13900   0.25000   0.24000
Kmid(ab)   0.06800   0.13900   0.25000   0.12000
Naext(ab)   0.09100   0.18200   0.25000   0.20000
Kext(ab)   0.09100   0.18200   0.25000   0.06000
Naint(c1)   0.39100   0.43900   0.25000   1.00000
Naint(c2)   0.58700   0.41400   0.25000   1.00000
Kext(c)   0.59100   0.68300   0.25000   1.00000
Si1   0.16150   0.20490   0.75000   1.00000
Si2   0.29210   0.45970   0.75000   1.00000
Si3   0.04100   0.33500   0.75000   1.00000
Si4   0.20820   0.54080   0.25000   1.00000
Al1   0.03450   0.20820   0.75000   1.00000
Al2   0.29900   0.33300   0.75000   1.00000
Al3   0.16800   0.46400   0.75000   1.00000
Al4   0.20900   0.66920   0.25000   1.00000
O1   0.10500   0.21500   0.75000   1.00000
O2   0.06000   0.28440   0.75000   1.00000
O3   0.17200   0.00200   0.02000   1.00000
O5   0.29400   0.39900   0.75000   1.00000
O6   0.21100   0.27300   0.75000   1.00000
O7   0.66700  -0.00500   0.02100   1.00000
O8   0.66900   0.50600   0.50800   1.00000
O9   0.10600   0.39800   0.75000   1.00000
O10   0.22300   0.44500   0.75000   1.00000
O11   0.17400   0.51100   0.99300   1.00000
O13   0.22000   0.60800   0.25000   1.00000
O14   0.27600   0.55300   0.25000   1.00000
Ca1   0.66667   0.33333   0.75000   1.00000
Cl1   0.66667   0.33333   0.25000   1.00000
Ca2   0.33400   0.16900   0.25000   1.00000
Cl2   0.31300   0.15610   0.75000   1.00000
Cl(a)  -0.01800   0.02400   0.25000   0.16667
Cl(b)   0.02900   0.04700   0.25000   0.16667
Cl(c)   0.52900   0.54700   0.25000   1.00000