#------------------------------------------------------------------------------
#$Date: 2016-02-19 15:29:56 +0100 (vie 19 de feb de 2016) $
#$Revision: 176759 $
#$URL: svn://www.crystallography.net/cod/cif/2/00/29/2002925.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_2002925
loop_
_publ_author_name
'Srivastava, R. C.'
'Klooster, W. T.'
'Koetzle, T. F.'
_publ_section_title
;
 Neutron structures of ammonium tetrafluoroberyllate
;
_journal_issue                   1
_journal_name_full               'Acta Crystallographica Section B'
_journal_page_first              17
_journal_page_last               23
_journal_paper_doi               10.1107/S010876819800737X
_journal_volume                  55
_journal_year                    1999
_chemical_formula_iupac          '(N H4)2 Be F4'
_chemical_formula_sum            'Be F4 H8 N2'
_chemical_formula_weight         121.093
_chemical_name_systematic
;
ammonium tetrafluoroberyllate
;
_space_group_IT_number           62
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  '-P 2ac 2n'
_symmetry_space_group_name_H-M   'P n m a'
_cell_angle_alpha                90.0
_cell_angle_beta                 90.0
_cell_angle_gamma                90.0
_cell_formula_units_Z            4
_cell_length_a                   7.531(3)
_cell_length_b                   5.874(2)
_cell_length_c                   10.399(4)
_cell_measurement_reflns_used    32
_cell_measurement_temperature    200
_cell_measurement_theta_max      27
_cell_measurement_theta_min      20
_cell_volume                     460.0(3)
_computing_cell_refinement       local
_computing_data_collection       local
_computing_data_reduction        local
_computing_structure_refinement  'UPALS (Lundgren, 1982)'
_diffrn_ambient_temperature      200
_diffrn_measurement_device       'beamline H6M, HFBR'
_diffrn_measurement_method       θ/2θ
_diffrn_radiation_monochromator  'Be (002)'
_diffrn_radiation_probe          neutron
_diffrn_radiation_source         reactor
_diffrn_radiation_type           neutron
_diffrn_radiation_wavelength     1.0462
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       0
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       0
_diffrn_reflns_number            1018
_diffrn_reflns_theta_max         55
_diffrn_reflns_theta_min         2
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 100
_diffrn_standards_number         2
_exptl_absorpt_coefficient_mu    0.291
_exptl_absorpt_correction_T_max  0.428
_exptl_absorpt_correction_T_min  0.356
_exptl_absorpt_correction_type   analytical
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.748
_exptl_crystal_description       box
_exptl_crystal_size_max          4.0
_exptl_crystal_size_mid          3.9
_exptl_crystal_size_min          3.9
_refine_diff_density_max         '2 % of maximum'
_refine_diff_density_min         '2 % of maximum'
_refine_ls_abs_structure_details ' ?'
_refine_ls_extinction_coef       36E2(2)
_refine_ls_extinction_method     'type I, isotropic'
_refine_ls_goodness_of_fit_all   1.0428
_refine_ls_goodness_of_fit_obs   1.0428
_refine_ls_hydrogen_treatment    ref
_refine_ls_matrix_type           full
_refine_ls_number_constraints    0
_refine_ls_number_parameters     83
_refine_ls_number_reflns         996
_refine_ls_number_restraints     0
_refine_ls_R_factor_all          0.0679
_refine_ls_R_factor_obs          0.0679
_refine_ls_shift/esd_max         .01
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details     'w= 1/[σ²(F)+0.0004F²]'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_all         0.0733
_refine_ls_wR_factor_obs         0.0733
_reflns_number_observed          790
_reflns_number_total             996
_reflns_observed_criterion       I>3\s
_cod_data_source_file            bk0051.cif
_cod_data_source_block           I
_cod_depositor_comments
;
The following automatic conversions were performed:

'_atom_site_thermal_displace_type' tag value 'Uij' was replaced with
'Uani' value 12 times.

Automatic conversion script
Id: cif_fix_values 1646 2011-03-28 12:23:43Z adriana 

The following automatic conversions were performed:

'_refine_ls_weighting_scheme' value 'w= 1/[\s^2^(F)+0.0004F^2^]' was
changed to 'calc'. New tag '_refine_ls_weighting_details' was
created. The value of the new tag was set to 'w=
1/[\s^2^(F)+0.0004F^2^]'.

Automatic conversion script
Id: cif_fix_values 3143 2015-03-26 13:38:13Z robertas 
;
_cod_original_cell_volume        460.0(5)
_cod_database_code               2002925
_cod_database_fobs_code          2002925
loop_
_symmetry_equiv_pos_as_xyz
x,y,z
1/2+x,1/2-y,1/2-z
-x,1/2+y,-z
1/2-x,-y,1/2+z
-x,-y,-z
1/2-x,1/2+y,1/2+z
x,1/2-y,z
1/2+x,y,1/2-z
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
N1 0.0158(4) 0.0186(4) 0.0231(5) 0.0000 0.0005(4) 0.0000
N2 0.0200(4) 0.0185(4) 0.0186(4) 0.0000 0.0014(4) 0.0000
Be 0.0134(4) 0.0144(5) 0.0149(5) 0.0000 0.0003(4) 0.0000
F1 0.0156(8) 0.0447(12) 0.0524(16) 0.0000 -0.0087(9) 0.0000
F2 0.0352(12) 0.0569(15) 0.0163(8) 0.0000 -0.0020(8) 0.0000
F3 0.0300(7) 0.0200(5) 0.0515(10) 0.0002(5) 0.0118(7) -0.0159(6)
H1 0.030(2) 0.066(3) 0.063(3) 0.000 -0.014(2) 0.000
H2 0.054(3) 0.084(4) 0.063(4) 0.000 0.035(3) 0.000
H3 0.045(2) 0.074(3) 0.142(5) -0.015(2) 0.017(2) -0.072(3)
H4 0.077(4) 0.084(4) 0.027(2) 0.000 0.015(2) 0.000
H5 0.040(2) 0.081(4) 0.065(3) 0.000 -0.021(2) 0.000
H6 0.106(4) 0.066(2) 0.057(2) -0.053(3) -0.004(2) 0.001(2)
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_U_iso_or_equiv
_atom_site_thermal_displace_type
_atom_site_calc_flag
_atom_site_calc_attached_atom
_atom_site_type_symbol
N1 0.1850(2) 0.2500 0.09900(10) ? Uani ? ? N
N2 0.4610(2) 0.2500 0.80440(10) ? Uani ? ? N
Be 0.2505(2) 0.2500 0.41840(10) ? Uani ? ? Be
F1 0.0531(3) 0.2500 0.3817(3) ? Uani ? ? F
F2 0.2747(3) 0.2500 0.5639(2) ? Uani ? ? F
F3 0.3354(2) 0.0348(3) 0.3638(2) ? Uani ? ? F
H1 0.3137(7) 0.2500 0.1244(6) ? Uani ? ? H
H2 0.0996(9) 0.2500 0.1711(7) ? Uani ? ? H
H3 0.1639(6) 0.1137(9) 0.0497(7) ? Uani ? ? H
H4 0.4897(10) 0.2500 0.7106(5) ? Uani ? ? H
H5 0.5686(7) 0.2500 0.8596(7) ? Uani ? ? H
H6 0.3854(8) 0.1174(8) 0.8238(4) ? Uani ? ? H
loop_
_atom_type_symbol
_atom_type_description
_atom_type_scat_source
H -3.7406 International_Tables_Vol_C
Be 7.79 International_Tables_Vol_C
N 9.36 International_Tables_Vol_C
F 5.654 International_Tables_Vol_C
loop_
_diffrn_standard_refln_index_h
_diffrn_standard_refln_index_k
_diffrn_standard_refln_index_l
0 -4 0
0 -2 6
loop_
_geom_angle_atom_site_label_1
_geom_angle_atom_site_label_2
_geom_angle_atom_site_label_3
_geom_angle
_geom_angle_publ_flag
H1 N1 H2 115.4(6) no
H1 N1 H3 107.4(3) no
H2 N1 H3 107.3(4) no
H4 N2 H5 112.8(6) no
H4 N2 H6 108.9(4) no
H5 N2 H6 110.7(4) no
F1 Be F2 111.3(2) no
F1 Be F3 108.20(10) no
F2 Be F3 108.60(10) no
loop_
_geom_bond_atom_site_label_1
_geom_bond_atom_site_label_2
_geom_bond_distance
_geom_bond_publ_flag
N1 H1 1.004(5) no
N1 H2 .988(7) no
N1 H3 .964(6) no
N2 H4 1.000(5) no
N2 H5 .993(6) no
N2 H6 .985(6) no
Be F1 1.535(3) no
Be F2 1.524(3) no
Be F3 1.526(2) no
loop_
_geom_hbond_atom_site_label_D
_geom_hbond_atom_site_label_H
_geom_hbond_atom_site_label_A
_geom_hbond_site_symmetry_A
_geom_hbond_distance_DH
_geom_hbond_distance_HA
_geom_hbond_distance_DA
_geom_hbond_angle_DHA
_geom_hbond_publ_flag
N1 H1 F1 2_555 1.004(5) 1.804(6) 2.779(2) 162.7(6) yes
N2 H5 F2 8_556 .993(6) 1.744(6) 2.731(3) 171.9(6) yes
N2 H6 F3 4_555 .986(5) 1.933(6) 2.857(2) 155.0(5) yes
