Archerite
      Frazer B C, Pepinsky R
      Acta Crystallographica 6 (1953) 273-285
      X-ray analysis of the ferroelectric transition in KH2PO4
      Sample: at T = 116 K
      Locality: synthetic, low-temperature form
      _database_code_amcsd 0009155

      CELL PARAMETERS:   10.5300  10.4400   6.9000   90.000   90.000   90.000
      SPACE GROUP: Fdd2      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    758.539
      Density (g/cm3):      1.787
      MAX. ABS. INTENSITY / VOLUME**2:      16.13492306    
      RIR:      2.939
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                17.56          6.41        5.0509    1   1   1         4
                24.01        100.00        3.7069    2   2   0         4
                29.81          6.52        2.9968    3   1   1         4
                29.98          4.66        2.9801    1   3   1         4
                30.99         43.98        2.8857    2   0   2         2
                31.07         43.98        2.8782    0   2   2         2
                34.06         14.09        2.6325    4   0   0         2
                34.36         13.71        2.6100    0   4   0         2
                35.55          2.29        2.5255    2   2   2         4
                41.09          3.73        2.1967    1   1   3         4
                46.76         25.35        1.9425    4   2   2         4
                46.94         25.22        1.9357    2   4   2         4
                48.09          1.10        1.8919    3   1   3         4
                49.16          5.38        1.8535    4   4   0         4
                52.49          1.40        1.7433    5   3   1         4
                52.71          1.12        1.7367    3   5   1         4
                53.09          1.25        1.7250    0   0   4         1
                55.22          6.04        1.6635    6   2   0         4
                55.63          5.89        1.6521    2   6   0         4
                59.05          5.44        1.5642    6   0   2         2
                59.07          9.68        1.5640    2   2   4         4
                59.50          5.32        1.5536    0   6   2         2
                64.59          4.43        1.4428    4   0   4         2
                64.78          4.38        1.4391    0   4   4         2
                70.14          6.08        1.3417    6   4   2         4
                70.37          6.02        1.3380    4   6   2         4
                71.70          1.81        1.3162    8   0   0         2
                72.42          1.75        1.3050    0   8   0         2
                75.25          7.17        1.2627    4   4   4         4
                77.20          2.12        1.2356    6   6   0         4
                80.15          4.35        1.1974    6   2   4         4
                80.19          4.04        1.1970    8   2   2         4
                80.50          4.30        1.1932    2   6   4         4
                80.83          3.94        1.1891    2   8   2         4
                81.98          2.45        1.1753    8   4   0         4
                82.50          2.40        1.1692    4   8   0         4
                86.66          1.72        1.1235    2   0   6         2
                86.70          1.71        1.1231    0   2   6         2
================================================================================
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.