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 = 473 K
      Locality: synthetic
      _database_code_amcsd 0013544

      CELL PARAMETERS:    3.9854   3.9854   5.0435   90.000   90.000   90.000
      SPACE GROUP: P4/nmm    
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:     80.108
      Density (g/cm3):      9.252
      MAX. ABS. INTENSITY / VOLUME**2:      749.1310224    
      RIR:     26.365
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                17.58          2.76        5.0435    0   0   1         2
                28.55        100.00        3.1270    1   0   1         8
                31.75         32.01        2.8181    1   1   0         4
                35.60         11.36        2.5217    0   0   2         2
                42.42          1.10        2.1310    1   0   2         8
                45.52         15.58        1.9927    2   0   0         4
                48.44         24.81        1.8792    1   1   2         8
                54.61         30.29        1.6805    2   1   1        16
                59.09         10.03        1.5635    2   0   2         8
                59.69         10.57        1.5490    1   0   3         8
                66.34          4.48        1.4091    2   2   0         4
                73.75          5.63        1.2846    3   0   1         8
                75.38          1.29        1.2609    0   0   4         2
                75.42          4.75        1.2603    3   1   0         8
                77.62          4.21        1.2301    2   2   2         8
                78.15          8.79        1.2230    2   1   3        16
                84.11          3.02        1.1509    1   1   4         8
                86.29          7.63        1.1273    3   1   2        16
================================================================================
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.