Litharge
      Boher P, Garnier P, Gavarri J R, Hewat A W
      Journal of Solid State Chemistry 57 (1985) 343-350
      Monoxyde quadratique PbO alpha(I): Description de la transition structurale ferroelastique
      Method: X-ray Diffraction
      T = 77.6 K
      Locality: synthetic
      _database_code_amcsd 0013540

      CELL PARAMETERS:    3.9645   3.9645   4.9956   90.000   90.000   90.000
      SPACE GROUP: P4/nmm    
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:     78.517
      Density (g/cm3):      9.439
      MAX. ABS. INTENSITY / VOLUME**2:      790.9670157    
      RIR:     27.284
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                17.75          2.46        4.9956    0   0   1         2
                28.75        100.00        3.1054    1   0   1         8
                31.92         32.29        2.8033    1   1   0         4
                35.95         11.50        2.4978    0   0   2         2
                45.77         16.32        1.9822    2   0   0         4
                48.83         26.17        1.8649    1   1   2         8
                54.95         32.63        1.6709    2   1   1        16
                59.54         10.97        1.5527    2   0   2         8
                60.28         11.60        1.5353    1   0   3         8
                66.73          5.05        1.4017    2   2   0         4
                74.23          6.54        1.2776    3   0   1         8
                75.89          5.55        1.2537    3   1   0         8
                76.24          1.52        1.2489    0   0   4         2
                78.20          4.98        1.2224    2   2   2         8
                78.86         10.48        1.2138    2   1   3        16
                85.03          3.72        1.1408    1   1   4         8
                86.95          9.46        1.1205    3   1   2        16
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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.