Synthesis, crystal structure and vibrational spectra of a new diammonium zinc(II) dihydrogendiphosphate dihydrate, (NH~4~)~2~Zn(H~2~P~2~O~7~)~2~·2H~2~O
Essehli, Rachid; Lachkar, Mohammed; Svoboda, Ingrid; Fuess, Hartmut; El Bali, Brahim; Acta Crystallographica Section E 61 (2005) i32–i34; doi:10.1107/S1600536805004642

data_2205202
_publ_section_title
;
 Synthesis, crystal structure and vibrational spectra of a new
 diammonium zinc(II) dihydrogendiphosphate dihydrate,
 (NH~4~)~2~Zn(H~2~P~2~O~7~)~2~&#x00B7;2H~2~O
;
_journal_issue                   3
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              i32
_journal_page_last               i34
_journal_paper_doi               10.1107/S1600536805004642
_journal_volume                  61
_journal_year                    2005
_chemical_formula_iupac          '(N H4)2 Zn (H2 P2 O7)2, 2H2 O'
_chemical_formula_moiety         '2N H4 +, H4 P4 O14 Zn 2-, 2H2 O'
_chemical_formula_structural     '2N H4 +, H4 P4 O14 Zn 2-, 2H2 O'
_chemical_formula_sum            'H16 N2 O16 P4 Zn'
_chemical_formula_weight         489.40
_chemical_name_systematic
;
diammonium zinc(II) dihydrogendiphosphate dihydrate
;
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   difmap
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                81.2400(10)
_cell_angle_beta                 71.0800(10)
_cell_angle_gamma                88.1500(10)
_cell_formula_units_Z            1
_cell_length_a                   7.0074(9)
_cell_length_b                   7.3390(10)
_cell_length_c                   7.7960(10)
_cell_measurement_reflns_used    2048
_cell_measurement_temperature    301(2)
_cell_measurement_theta_max      29.80
_cell_measurement_theta_min      2.84
_cell_volume                     374.78(9)
_computing_cell_refinement       'CrysAlis RED (Oxford Diffraction, 2001)'
_computing_data_collection       'CrysAlis CCD (Oxford Diffraction, 2001)'
_computing_data_reduction        'CrysAlis RED'
_computing_molecular_graphics    'DIAMOND (Brandenburg, 1999)'
_computing_publication_material  SHELXL97
_computing_structure_refinement  'SHELXL97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      301(2)
_diffrn_measured_fraction_theta_full 0.976
_diffrn_measured_fraction_theta_max 0.976
_diffrn_measurement_device_type
;
Oxford Diffraction Xcalibur with Sapphire CCD detector
;
_diffrn_measurement_method       'Rotation method data acquisition using \w'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0361
_diffrn_reflns_av_sigmaI/netI    0.0327
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       6
_diffrn_reflns_limit_k_min       -9
_diffrn_reflns_limit_l_max       9
_diffrn_reflns_limit_l_min       -9
_diffrn_reflns_number            2491
_diffrn_reflns_theta_full        26.37
_diffrn_reflns_theta_max         26.37
_diffrn_reflns_theta_min         4.13
_diffrn_standards_decay_%        0
_exptl_absorpt_coefficient_mu    2.153
_exptl_absorpt_correction_T_max  0.8466
_exptl_absorpt_correction_T_min  0.6045
_exptl_absorpt_correction_type   analytical
_exptl_absorpt_process_details   '(CrysAlis RED; Oxford Diffraction, 2003)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    2.168
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Prism
_exptl_crystal_F_000             248
_exptl_crystal_size_max          0.26
_exptl_crystal_size_mid          0.18
_exptl_crystal_size_min          0.08
_refine_diff_density_max         0.783
_refine_diff_density_min         -0.719
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.060
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     130
_refine_ls_number_reflns         1495
_refine_ls_number_restraints     14
_refine_ls_restrained_S_all      1.056
_refine_ls_R_factor_all          0.0328
_refine_ls_R_factor_gt           0.0318
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w = 1/[\s^2^(Fo^2^)+(0.0631P)^2^+0.1969P] where P = (Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0896
_refine_ls_wR_factor_ref         0.0904
_reflns_number_gt                1402
_reflns_number_total             1495
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            br6177.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 (11
times).

'_geom_bond_publ_flag' value 'No' changed to 'no' according to
'/home/saulius/struct/CIF-dictionaries/cif_core.dic' dictionary named
'cif_core.dic' version 2.4.1 from 2010-06-29 (8 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 (11
times).

'_geom_bond_publ_flag' value 'No' changed to 'no' according
to /home/saulius/struct/CIF-dictionaries/cif_core.dic dictionary
named 'cif_core.dic' version 2.4.1 from 2010-06-29 (8 times).

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_database_code               2205202
_cod_database_fobs_code          2205202