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
      Locality: synthetic
      Method: X-ray Diffraction
      T = 723 K
      _database_code_amcsd 0013546

      CELL PARAMETERS:    4.0039   4.0039   5.0712   90.000   90.000   90.000
      SPACE GROUP: P4/nmm    
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:     81.298
      Density (g/cm3):      9.117
      MAX. ABS. INTENSITY / VOLUME**2:      724.1688594    
      RIR:     25.865
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                17.49          3.16        5.0712    0   0   1         2
                28.40        100.00        3.1425    1   0   1         8
                31.60         31.95        2.8312    1   1   0         4
                35.40         11.21        2.5356    0   0   2         2
                42.19          1.39        2.1422    1   0   2         8
                45.30         15.31        2.0020    2   0   0         4
                48.18         24.10        1.8888    1   1   2         8
                54.33         29.28        1.6884    2   1   1        16
                58.77          9.55        1.5712    2   0   2         8
                59.34          9.96        1.5573    1   0   3         8
                64.17          1.10        1.4514    1   1   3         8
                65.99          4.25        1.4156    2   2   0         4
                73.35          5.24        1.2907    3   0   1         8
                74.90          1.16        1.2678    0   0   4         2
                75.02          4.42        1.2661    3   1   0         8
                77.18          3.86        1.2360    2   2   2         8
                77.68          7.97        1.2292    2   1   3        16
                83.56          2.64        1.1571    1   1   4         8
                85.78          6.87        1.1328    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.