#------------------------------------------------------------------------------
#$Date: 2013-05-05 17:21:46 +0300 (Sun, 05 May 2013) $
#$Revision: 85285 $
#$URL: file:///home/coder/svn-repositories/cod/cif/9/01/22/9012283.cif $
#------------------------------------------------------------------------------
#
# This file is available in the Crystallography Open Database (COD),
# http://www.crystallography.net/. The original data for this entry
# were provided the American Mineralogist Crystal Structure Database,
# http://rruff.geo.arizona.edu/AMS/amcsd.php
#
# The file may be used within the scientific community so long as
# proper attribution is given to the journal article from which the
# data were obtained.
#
data_9012283
loop_
_publ_author_name
'Grey, I. E.'
'Mumme, W. G.'
'Ness, T. J.'
'Roth, R. S.'
'Smith, K. L.'
_publ_section_title
;Structural relations between weberite and zirconolite polytypes - refinements
 of doped 3T and 4M Ca2Ta2O7 and 3T CaZrTi2O7 Sample: T = 295 K, 4M
 weberite-type structure
;
_journal_name_full               'Journal of Solid State Chemistry'
_journal_page_first              285
_journal_page_last               295
_journal_volume                  174
_journal_year                    2003
_chemical_formula_structural     Ca2Ta2O7
_chemical_formula_sum            'Ca7.676 Nd0.324 O28 Ta7.705 Zr0.295'
_space_group_IT_number           5
_symmetry_space_group_name_Hall  'C 2y'
_symmetry_space_group_name_H-M   'C 1 2 1'
_cell_angle_alpha                90
_cell_angle_beta                 100.17
_cell_angle_gamma                90
_cell_length_a                   12.761
_cell_length_b                   7.358
_cell_length_c                   24.565
_cell_volume                     2270.302
_diffrn_ambient_temperature      295
_exptl_crystal_density_diffrn    6.505
_[local]_cod_chemical_formula_sum_orig 'Ca7.676 Ta7.705 Nd.324 Zr.295 O28'
_cod_database_code               9012283
loop_
_symmetry_equiv_pos_as_xyz
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
Ca1 0.00000 0.00000 0.00000 1.00000 0.00270
Ta1 0.00000 0.48300 0.00000 1.00000 0.00230
Ca11 0.25650 0.26700 0.00670 0.95800 0.00600
NdCa11 0.25650 0.26700 0.00670 0.04200 0.00600
Ta2 0.12610 0.75300 0.12174 0.94600 0.00380
ZrTa2 0.12610 0.75300 0.12174 0.05400 0.00380
Ca2 0.12930 0.26900 0.12870 1.00000 0.02100
Ta21 0.37760 0.00700 0.12772 0.97400 0.00500
ZrTa21 0.37760 0.00700 0.12772 0.02600 0.00500
Ta22 0.38010 0.51000 0.12553 0.97600 0.00480
ZrTa22 0.38010 0.51000 0.12553 0.02400 0.00480
Ca3 0.25850 0.50710 0.24720 0.91800 0.00600
NdCa3 0.25850 0.50710 0.24720 0.08200 0.00600
Ta3 0.23950 0.01700 0.24980 1.00000 0.00640
Ca31 0.00970 0.25500 0.25490 1.00000 0.00210
Ca32 0.00840 0.74500 0.25040 1.00000 0.01500
Ta4 0.12830 0.50500 0.37414 0.95800 0.00460
ZrTa4 0.12830 0.50500 0.37414 0.04200 0.00460
Ca4 0.12780 0.00500 0.38010 0.87600 0.00860
NdCa4 0.12780 0.00500 0.38010 0.12400 0.00860
Ta41 0.37900 0.25600 0.37435 1.00000 0.00440
Ta42 0.37700 0.75400 0.37134 0.85100 0.00440
ZrTa42 0.37700 0.75400 0.37134 0.14900 0.00440
Ca5 0.00000 0.51200 0.50000 1.00000 0.02400
Ta5 0.00000 0.01100 0.50000 1.00000 0.00340
Ca51 0.24830 0.25800 0.49850 0.92400 0.00800
NdCa51 0.24830 0.25800 0.49850 0.07600 0.00800
O1 0.64000 0.99600 0.45660 1.00000 0.01300
O2 0.41500 0.48400 0.20680 1.00000 0.00800
O3 0.39200 0.01000 0.04810 1.00000 0.01000
O4 0.13700 0.00800 0.46810 1.00000 0.01100
O5 0.36600 0.01600 0.20620 1.00000 0.00900
O6 0.12500 0.99600 0.28980 1.00000 0.01200
O7 0.73600 0.79800 0.38770 1.00000 0.01800
O8 0.17100 0.23500 0.21360 1.00000 0.01300
O9 0.33200 0.19600 0.29670 1.00000 0.01100
O10 0.08600 0.69600 0.04370 1.00000 0.01800
O11 0.43100 0.30400 0.45450 1.00000 0.00800
O12 0.59000 0.80100 0.03710 1.00000 0.00600
O13 0.52600 0.80100 0.35880 1.00000 0.01300
O14 0.85500 0.50100 0.39770 1.00000 0.01600
O15 0.73100 0.42700 0.10220 1.00000 0.01700
O16 0.82300 0.75700 0.11460 1.00000 0.01300
O17 0.82700 0.30700 0.29150 1.00000 0.00800
O18 0.73100 0.05800 0.13690 1.00000 0.00800
O19 0.93400 0.25800 0.13740 1.00000 0.01200
O20 0.73400 0.20600 0.38790 1.00000 0.01300
O21 0.43500 0.70500 0.45100 1.00000 0.01900
O22 0.89800 0.00200 0.34970 1.00000 0.01600
O23 0.67200 0.32100 0.20240 1.00000 0.00800
O24 0.12100 0.50400 0.29310 1.00000 0.01000
O25 0.83800 0.03300 0.04370 1.00000 0.01500
O26 0.52500 0.09500 0.14910 1.00000 0.01200
O27 0.52500 0.20700 0.36280 1.00000 0.01300
O28 0.52400 0.45800 0.11110 1.00000 0.01300