Archerite
      Frazer B C, Pepinsky R
      Acta Crystallographica 6 (1953) 273-285
      X-ray analysis of the ferroelectric transition in KH2PO4
      Sample: at T = 126 K
      Locality: synthetic
      Note: low-temperature polymorph of archerite
      _database_code_amcsd 0009154

      CELL PARAMETERS:   10.4800  10.4800   6.9000   90.000   90.000   90.000
      SPACE GROUP: F-4d2     
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    757.830
      Density (g/cm3):      1.789
      MAX. ABS. INTENSITY / VOLUME**2:      15.81530075    
      RIR:      2.879
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                24.02        100.00        3.7052    2   2   0         4
                29.91          3.15        2.9874    3   1   1         8
                31.04         89.55        2.8815    2   0   2         4
                34.22         28.78        2.6200    4   0   0         4
                35.56          2.08        2.5249    2   2   2         8
                38.41          1.10        2.3434    4   2   0         8
                38.72          4.61        2.3256    3   3   1         8
                41.09          2.44        2.1966    1   1   3         8
                46.08          4.27        1.9698    5   1   1         8
                46.87         52.32        1.9385    4   2   2         8
                48.16          1.24        1.8895    3   1   3         8
                49.18          5.23        1.8526    4   4   0         4
                53.09          1.36        1.7250    0   0   4         2
                55.45         12.50        1.6570    6   2   0         8
                59.07         10.30        1.5638    2   2   4         8
                59.30         10.97        1.5583    6   0   2         4
                64.70          9.06        1.4408    4   0   4         4
                70.28         12.46        1.3393    6   4   2         8
                72.10          3.78        1.3100    8   0   0         4
                75.27          7.56        1.2625    4   4   4         8
                77.24          2.15        1.2351    6   6   0         4
                80.35          8.79        1.1950    6   2   4         8
                80.55          8.10        1.1925    8   2   2         8
                82.29          4.86        1.1717    8   4   0         8
                86.68          3.75        1.1233    2   0   6         4
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       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.