Phosphonoacetic Acid (H~3~AP) and its Salts KH~2~AP.H~2~ O, (NH~4~)H~2~AP, LiH~2~AP, NaH~2~AP.2H~2~ O, K~2~HAP, (NH~4~)~2~HAP, Na~2~HAP.2H~2~ O, (NH~4~)~3~AP.2H~2~ O and Na~3~AP.10H~2~O
Lis, T.; Acta Crystallographica Section C 53 (1997) 28–42; doi:10.1107/S0108270196009390

data_2005882
_publ_section_title
;
 Phosphonoacetic Acid (H~3~AP) and its Salts KH~2~AP.H~2~ O,
 (NH~4~)H~2~AP, LiH~2~AP, NaH~2~AP.2H~2~ O, K~2~HAP, (NH~4~)~2~HAP,
 Na~2~HAP.2H~2~ O, (NH~4~)~3~AP.2H~2~ O and Na~3~AP.10H~2~O
;
_journal_issue                   1
_journal_name_full               'Acta Crystallographica Section C'
_journal_page_first              28
_journal_page_last               42
_journal_paper_doi               10.1107/S0108270196009390
_journal_volume                  53
_journal_year                    1997
_chemical_formula_moiety         'K 1+, (C2 H4 O5 P) 1-, H2 O'
_chemical_formula_sum            'C2 H6 K O6 P'
_chemical_formula_weight         196.14
_chemical_name_systematic        'Potassium phosphonoacetate hydrate'
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_cell_angle_alpha                90.
_cell_angle_beta                 99.73(4)
_cell_angle_gamma                90.
_cell_formula_units_Z            4
_cell_length_a                   7.949(4)
_cell_length_b                   9.931(5)
_cell_length_c                   8.407(4)
_cell_measurement_reflns_used    40
_cell_measurement_temperature    297(2)
_cell_measurement_theta_max      17
_cell_measurement_theta_min      10
_cell_volume                     654.1(6)
_diffrn_ambient_temperature      293(2)
_diffrn_measurement_device       'Kuma KM4 automatic diffractometer'
_diffrn_measurement_method       '\w/2\q scans'
_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  0.0265
_diffrn_reflns_av_sigmaI/netI    0.0488
_diffrn_reflns_limit_h_max       5
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       16
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       13
_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            3523
_diffrn_reflns_theta_max         35
_diffrn_reflns_theta_min         2
_diffrn_standards_decay_%        2
_diffrn_standards_interval_count 50
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    1.028
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.992(2)
_exptl_crystal_density_meas      ?
_exptl_crystal_description       'thick plates'
_exptl_crystal_F_000             400
_exptl_crystal_size_max          0.3
_exptl_crystal_size_mid          0.3
_exptl_crystal_size_min          0.1
_refine_diff_density_max         0.72
_refine_diff_density_min         -0.36
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_all   1.041
_refine_ls_goodness_of_fit_obs   1.084
_refine_ls_hydrogen_treatment    refall
_refine_ls_matrix_type           full
_refine_ls_number_parameters     120
_refine_ls_number_reflns         2466
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.005
_refine_ls_restrained_S_obs      1.084
_refine_ls_R_factor_all          0.0822
_refine_ls_R_factor_obs          0.0375
_refine_ls_shift/esd_max         0.084
_refine_ls_shift/esd_mean        0.008
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w = 1/[\s^2^(Fo^2^)+(0.059P)^2^+0.066P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_all         0.1050
_refine_ls_wR_factor_obs         0.0934
_reflns_number_observed          1966
_reflns_number_total             2838
_reflns_observed_criterion       >2sigma(I)
_cod_data_source_file            mu1260.cif
_cod_data_source_block           III
_cod_depositor_comments
;
The following automatic conversions were performed:

'_exptl_crystal_density_meas' value 'not measured' was changed to '?'
- the value is perceived as not measured.

Automatic conversion script
Id: cif_fix_values 3008 2015-01-20 13:52:24Z robertas 

The following automatic conversions were performed:

'_refine_ls_weighting_scheme' value 'calc w =
1/[\s^2^(Fo^2^)+(0.059P)^2^+0.066P] where P=(Fo^2^+2Fc^2^)/3' 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^(Fo^2^)+(0.059P)^2^+0.066P] where P=(Fo^2^+2Fc^2^)/3'.

Automatic conversion script
Id: cif_fix_values 3143 2015-03-26 13:38:13Z robertas 
;
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               2005882