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; in the cryostat
      T = 295 K
      Locality: synthetic
      _database_code_amcsd 0013542

      CELL PARAMETERS:    3.9744   3.9744   5.0220   90.000   90.000   90.000
      SPACE GROUP: P4/nmm    
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:     79.327
      Density (g/cm3):      9.343
      MAX. ABS. INTENSITY / VOLUME**2:      749.1180079    
      RIR:     26.107
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                17.66          2.87        5.0220    0   0   1         2
                28.64        100.00        3.1165    1   0   1         8
                31.84         31.84        2.8103    1   1   0         4
                35.76         11.18        2.5110    0   0   2         2
                42.59          1.15        2.1228    1   0   2         8
                45.65         15.46        1.9872    2   0   0         4
                48.63         24.44        1.8725    1   1   2         8
                54.79         29.49        1.6756    2   1   1        16
                59.30          9.57        1.5583    2   0   2         8
                59.96         10.14        1.5427    1   0   3         8
                66.55          4.34        1.4052    2   2   0         4
                74.00          5.34        1.2810    3   0   1         8
                75.67          4.44        1.2568    3   1   0         8
                75.76          1.22        1.2555    0   0   4         2
                77.91          3.90        1.2262    2   2   2         8
                78.49          8.24        1.2186    2   1   3        16
                84.52          2.74        1.1463    1   1   4         8
                86.62          7.22        1.1239    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.