#------------------------------------------------------------------------------
#$Date: 2016-02-20 05:06:23 +0200 (Sat, 20 Feb 2016) $
#$Revision: 176774 $
#$URL: svn://www.crystallography.net/cod/cif/2/20/00/2200084.cif $
#------------------------------------------------------------------------------
#
# This file is available in the Crystallography Open Database (COD),
# http://www.crystallography.net/. The original data for this entry
# were provided by IUCr Journals, http://journals.iucr.org/.
#
# 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_2200084
loop_
_publ_author_name
'Baker, Charles F.'
'Barker, Marten G.'
'Blake, Alexander J.'
_publ_section_title
;
 Calcium nitride (Ca₂N), a redetermination
;
_journal_issue                   2
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              i6
_journal_page_last               i7
_journal_paper_doi               10.1107/S1600536801000472
_journal_volume                  57
_journal_year                    2001
_chemical_formula_moiety         'Ca2 N'
_chemical_formula_sum            'Ca2 N'
_chemical_formula_weight         94.17
_chemical_name_systematic
;
?
;
_space_group_IT_number           166
_symmetry_cell_setting           trigonal
_symmetry_space_group_name_Hall  '-R 3 2"'
_symmetry_space_group_name_H-M   'R -3 m :H'
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                120.00
_cell_formula_units_Z            3
_cell_length_a                   3.6271(3)
_cell_length_b                   3.6271(3)
_cell_length_c                   18.972(2)
_cell_measurement_reflns_used    49
_cell_measurement_temperature    298(2)
_cell_measurement_theta_max      16.5
_cell_measurement_theta_min      12.5
_cell_volume                     216.15(3)
_computing_cell_refinement       STADI4
_computing_data_collection       'STADI4 (Stoe & Cie, 1997)'
_computing_data_reduction        'X-RED (Stoe & Cie, 1997)'
_computing_publication_material  'SHELXL97 and PLATON (Spek, 2000)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 1997)'
_computing_structure_solution    'SIR97 (Altomare et al., 1994)'
_diffrn_ambient_temperature      298(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'Stoe Stadi-4 four-circle'
_diffrn_measurement_method       ω/θ
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     .71073
_diffrn_reflns_av_R_equivalents  .055
_diffrn_reflns_av_sigmaI/netI    .023
_diffrn_reflns_limit_h_max       5
_diffrn_reflns_limit_h_min       -5
_diffrn_reflns_limit_k_max       5
_diffrn_reflns_limit_k_min       -5
_diffrn_reflns_limit_l_max       25
_diffrn_reflns_limit_l_min       -25
_diffrn_reflns_number            864
_diffrn_reflns_theta_full        29.9
_diffrn_reflns_theta_max         29.9
_diffrn_reflns_theta_min         3.2
_diffrn_standards_decay_%        'random variation +-1.6'
_diffrn_standards_interval_time  60
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    3.61
_exptl_absorpt_correction_T_max  .652
_exptl_absorpt_correction_T_min  .574
_exptl_absorpt_correction_type   '\y scan'
_exptl_absorpt_process_details   '(X-RED; Stoe & Cie, 1997)'
_exptl_crystal_colour            'dark red'
_exptl_crystal_density_diffrn    2.170
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       sphenoid
_exptl_crystal_F_000             141
_exptl_crystal_size_max          .24
_exptl_crystal_size_mid          .16
_exptl_crystal_size_min          .16
_refine_diff_density_max         .23
_refine_diff_density_min         -.30
_refine_ls_extinction_coef       .063(8)
_refine_ls_extinction_method     SHELXL97
_refine_ls_goodness_of_fit_ref   1.28
_refine_ls_hydrogen_treatment    none
_refine_ls_matrix_type           full
_refine_ls_number_parameters     7
_refine_ls_number_reflns         104
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.28
_refine_ls_R_factor_all          .018
_refine_ls_R_factor_gt           .017
_refine_ls_shift/su_max          .001
_refine_ls_shift/su_mean         .000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w = 1/[σ²(Fo²)+0.28P] where P = (Fo²+2Fc²)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_ref         .038
_reflns_number_gt                99
_reflns_number_total             104
_reflns_threshold_expression     I>2σ(I)
_cod_data_source_file            br6000.cif
_cod_data_source_block           I
_cod_depositor_comments
;
The following automatic conversions were performed:
'_geom_bond_publ_flag' value 'Yes' changed to 'yes' according to
'/home/saulius/struct/CIF-dictionaries/cif_core.dic' dictionary named
'cif_core.dic' version 2.4.1 from 2010-06-29 (4 times).

Automatic conversion script
Id: cif_fix_enum 1527 2010-12-29 10:47:43Z saulius 

The following automatic conversions were performed:

'_geom_bond_publ_flag' value 'Yes' changed to 'yes' according to
/home/saulius/struct/CIF-dictionaries/cif_core.dic dictionary named
'cif_core.dic' version 2.4.1 from 2010-06-29 (4 times).

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_sg_symbol_H-M      'R -3 m'
_cod_database_code               2200084
_cod_database_fobs_code          2200084
loop_
_symmetry_equiv_pos_as_xyz
'x, y, z'
'-y, x-y, z'
'-x+y, -x, z'
'x-y, -y, -z'
'-x, -x+y, -z'
'y, x, -z'
'x+2/3, y+1/3, z+1/3'
'-y+2/3, x-y+1/3, z+1/3'
'-x+y+2/3, -x+1/3, z+1/3'
'x-y+2/3, -y+1/3, -z+1/3'
'-x+2/3, -x+y+1/3, -z+1/3'
'y+2/3, x+1/3, -z+1/3'
'x+1/3, y+2/3, z+2/3'
'-y+1/3, x-y+2/3, z+2/3'
'-x+y+1/3, -x+2/3, z+2/3'
'x-y+1/3, -y+2/3, -z+2/3'
'-x+1/3, -x+y+2/3, -z+2/3'
'y+1/3, x+2/3, -z+2/3'
'-x, -y, -z'
'y, -x+y, -z'
'x-y, x, -z'
'-x+y, y, z'
'x, x-y, z'
'-y, -x, z'
'-x+2/3, -y+1/3, -z+1/3'
'y+2/3, -x+y+1/3, -z+1/3'
'x-y+2/3, x+1/3, -z+1/3'
'-x+y+2/3, y+1/3, z+1/3'
'x+2/3, x-y+1/3, z+1/3'
'-y+2/3, -x+1/3, z+1/3'
'-x+1/3, -y+2/3, -z+2/3'
'y+1/3, -x+y+2/3, -z+2/3'
'x-y+1/3, x+2/3, -z+2/3'
'-x+y+1/3, y+2/3, z+2/3'
'x+1/3, x-y+2/3, z+2/3'
'-y+1/3, -x+2/3, z+2/3'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_U_iso_or_equiv
_atom_site_adp_type
_atom_site_calc_flag
_atom_site_refinement_flags
_atom_site_occupancy
_atom_site_disorder_assembly
_atom_site_disorder_group
_atom_site_type_symbol
Ca 1.0000 1.0000 .26631(3) .0136(2) Uani d S 1 . . Ca
N .6667 .3333 .3333 .0134(6) Uani d S 1 . . N
loop_
_atom_site_aniso_label
_atom_site_aniso_U_11
_atom_site_aniso_U_22
_atom_site_aniso_U_33
_atom_site_aniso_U_12
_atom_site_aniso_U_13
_atom_site_aniso_U_23
Ca .0125(3) .0125(3) .0157(3) .00624(13) .000 .000
N .0114(8) .0114(8) .0175(13) .0057(4) .000 .000
loop_
_atom_type_symbol
_atom_type_description
_atom_type_scat_dispersion_real
_atom_type_scat_dispersion_imag
_atom_type_scat_source
N N .0061 .0033 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
Ca Ca .2262 .3064 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
loop_
_geom_angle_atom_site_label_1
_geom_angle_atom_site_label_2
_geom_angle_atom_site_label_3
_geom_angle_site_symmetry_1
_geom_angle_site_symmetry_3
_geom_angle
Ca N Ca 1_545 1_445 95.503(14)
Ca N Ca 1_545 . 95.503(14)
Ca N Ca 1_445 . 95.503(14)
Ca N Ca 1_545 31_765 84.496(14)
Ca N Ca 1_445 31_765 180
Ca N Ca . 31_765 84.496(14)
Ca N Ca 1_545 31_655 84.496(14)
Ca N Ca 1_445 31_655 84.496(14)
Ca N Ca . 31_655 180
Ca N Ca 31_765 31_655 95.504(14)
Ca N Ca 1_545 31_665 180
Ca N Ca 1_445 31_665 84.496(14)
Ca N Ca . 31_665 84.496(14)
Ca N Ca 31_765 31_665 95.505(14)
Ca N Ca 31_655 31_665 95.505(14)
N Ca N 1_565 1_665 95.503(14)
N Ca N 1_565 . 95.503(14)
N Ca N 1_665 . 95.503(14)
N Ca Ca 1_565 31_775 47.752(7)
N Ca Ca 1_665 31_775 47.751(7)
N Ca Ca . 31_775 98.20(2)
N Ca Ca 1_565 31_665 47.752(7)
N Ca Ca 1_665 31_665 98.20(2)
N Ca Ca . 31_665 47.751(7)
Ca Ca Ca 31_775 31_665 66.802(18)
N Ca Ca 1_565 31_765 98.20(2)
N Ca Ca 1_665 31_765 47.752(7)
N Ca Ca . 31_765 47.752(7)
Ca Ca Ca 31_775 31_765 66.802(18)
Ca Ca Ca 31_665 31_765 66.802(18)
N Ca Ca 1_565 1_445 90.0
N Ca Ca 1_665 1_445 137.752(7)
N Ca Ca . 1_445 42.248(7)
Ca Ca Ca 31_775 1_445 123.401(9)
Ca Ca Ca 31_665 1_445 56.599(9)
Ca Ca Ca 31_765 1_445 90.0
N Ca Ca 1_565 1_665 90.0
N Ca Ca 1_665 1_665 42.248(7)
N Ca Ca . 1_665 137.752(7)
Ca Ca Ca 31_775 1_665 56.599(9)
Ca Ca Ca 31_665 1_665 123.401(9)
Ca Ca Ca 31_765 1_665 90.0
Ca Ca Ca 1_445 1_665 180
N Ca Ca 1_565 1_655 137.752(7)
N Ca Ca 1_665 1_655 42.248(7)
N Ca Ca . 1_655 90.0
Ca Ca Ca 31_775 1_655 90.0
Ca Ca Ca 31_665 1_655 123.401(9)
Ca Ca Ca 31_765 1_655 56.599(9)
Ca Ca Ca 1_445 1_655 120
Ca Ca Ca 1_665 1_655 60
N Ca Ca 1_565 1_565 42.248(7)
N Ca Ca 1_665 1_565 90.0
N Ca Ca . 1_565 137.752(7)
Ca Ca Ca 31_775 1_565 56.599(9)
Ca Ca Ca 31_665 1_565 90.0
Ca Ca Ca 31_765 1_565 123.401(9)
Ca Ca Ca 1_445 1_565 120
Ca Ca Ca 1_665 1_565 60
Ca Ca Ca 1_655 1_565 120
N Ca Ca 1_565 1_455 42.248(7)
N Ca Ca 1_665 1_455 137.752(7)
N Ca Ca . 1_455 90.0
Ca Ca Ca 31_775 1_455 90.0
Ca Ca Ca 31_665 1_455 56.599(9)
Ca Ca Ca 31_765 1_455 123.401(9)
Ca Ca Ca 1_445 1_455 60
Ca Ca Ca 1_665 1_455 120
Ca Ca Ca 1_655 1_455 180
Ca Ca Ca 1_565 1_455 60
N Ca Ca 1_565 1_545 137.752(7)
N Ca Ca 1_665 1_545 90.0
N Ca Ca . 1_545 42.248(7)
Ca Ca Ca 31_775 1_545 123.401(9)
Ca Ca Ca 31_665 1_545 90.0
Ca Ca Ca 31_765 1_545 56.599(9)
Ca Ca Ca 1_445 1_545 60
Ca Ca Ca 1_665 1_545 120
Ca Ca Ca 1_655 1_545 60
Ca Ca Ca 1_565 1_545 180
Ca Ca Ca 1_455 1_545 120
loop_
_geom_bond_atom_site_label_1
_geom_bond_atom_site_label_2
_geom_bond_site_symmetry_2
_geom_bond_distance
_geom_bond_publ_flag
Ca N . 2.4500(3) yes
Ca Ca 31_775 3.2944(8) yes
Ca Ca 1_545 3.6271(3) yes
Ca Ca 25_665 4.3221(6) yes
