#------------------------------------------------------------------------------
#$Date: 2008-01-13 22:15:36 +0000 (Sun, 13 Jan 2008) $
#$Revision: 14 $
#$URL: svn://www.crystallography.net/cod/cif/2/2000801.cif $
#------------------------------------------------------------------------------
#
# This file is available in the Crystallography Open Database (COD),
# http://www.crystallography.net/
#
# All data on this site have been placed in the public domain by the
# contributors.
#
data_2000801
_journal_name_full  'Acta Cryst.'
_journal_year  1992
_journal_volume  C48
_journal_page_first  1357
_journal_page_last  1359
_publ_section_title
; ?
;
loop_
_publ_author_name
 'Demartin, F.'
 'Gramaccioli, C.M.'
 'Pilati, T.'
_chemical_formula_sum  'As1 Ca2 O12 W2 Y1'
_chemical_formula_weight  803.68
_symmetry_cell_setting  Tetragonal
_symmetry_space_group_name_H-M  'I 41/a'
_symmetry_space_group_name_Hall  '-I 4ad'
_cell_length_a  5.1350(10)
_cell_length_b  5.1350(10)
_cell_length_c  33.882(5)
_cell_angle_alpha  90.0
_cell_angle_beta  90.0
_cell_angle_gamma  90.0
_cell_volume  893.4(4)
_cell_formula_units_Z  4
_cell_measurement_reflns_used  25
_cell_measurement_theta_min  9.30
_cell_measurement_theta_max  23.5
_cell_measurement_temperature  293
_exptl_crystal_description  'Small bipyramids'
_exptl_crystal_colour  'Creamy yellow'
_exptl_crystal_size_max  0.15
_exptl_crystal_size_mid  0.10
_exptl_crystal_size_min  0.05
_exptl_crystal_size_rad  ?
_exptl_crystal_density_diffrn  5.975
_exptl_crystal_density_meas  ?
_exptl_absorpt_coefficient_mu  37.6
loop_
_exptl_absorpt_correction_type
_exptl_absorpt_correction_T_min
_exptl_absorpt_correction_T_max
 'empirical \y scan' 0.38 1.00
 'DIFABS' 0.84 1.23
_diffrn_radiation_type  'MoK\a'
_diffrn_radiation_wavelength  0.71073
_diffrn_measurement_device  'Enraf-Nonius CAD-4'
_diffrn_measurement_method  'Variable scan speed'
_diffrn_reflns_number  4281
_diffrn_reflns_av_R_equivalents  0.027
_diffrn_reflns_theta_max  35
_diffrn_reflns_limit_h_min  -8
_diffrn_reflns_limit_h_max  8
_diffrn_reflns_limit_k_min  0
_diffrn_reflns_limit_k_max  8
_diffrn_reflns_limit_l_min  -54
_diffrn_reflns_limit_l_max  54
_diffrn_standards_number  1
_diffrn_standards_interval_count  150
_diffrn_standards_interval_time  ?
_diffrn_standards_decay_%  0.8
_reflns_number_total  1405
_reflns_number_observed  840
_reflns_observed_criterion  I>3\s(I)
_refine_ls_structure_factor_coef  F
_refine_ls_R_factor_obs  0.024
_refine_ls_wR_factor_obs  0.027
_refine_ls_goodness_of_fit_obs  1.104
_refine_ls_number_reflns  840
_refine_ls_number_parameters  45
_refine_ls_hydrogen_treatment  ?
_refine_ls_weighting_scheme  '1/\s^2^(F~o~)'
_refine_ls_shift/esd_max  0.01
_refine_diff_density_max  1.25
_refine_diff_density_min  0.75
_refine_ls_extinction_method  'none'
_refine_ls_extinction_coef  ?
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_U_iso_or_equiv
 Y .000 .250 .125 .00898(9)
 As .500 -.250 .125 .00842(9)
 W .000 -.250 .046790(10)
         .01032(4)
 Ca .500 .250 .04167(3) .0125(3)
 O(1) .2437(8) -.1147(8) .01600(10)
          .0171(8)
 O(2) .1559(7) .4784(7) .07050(10)
         .0158(8)
 O(3) .3220(9) -.0340(8) .09770(10)
          .0205(8)