Shannonite
      Krivovichev S V, Burns P C
      Mineralogical Magazine 64 (2000) 1063-1068
      Crystal chemistry of basic lead carbonates. I. Crystal structure of synthetic
      shannonite, Pb2O(CO3)
      Locality: synthetic
      _database_code_amcsd 0014550

      CELL PARAMETERS:    5.1465   9.0140   9.3150   90.000   90.000   90.000
      SPACE GROUP: P2_12_12_1
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    432.128
      Density (g/cm3):      7.537
      MAX. ABS. INTENSITY / VOLUME**2:      153.3051111    
      RIR:      6.623
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                13.67         20.96        6.4777    0   1   1         4
                19.06          2.02        4.6575    0   0   2         2
                19.71          3.83        4.5047    1   0   1         4
                21.48         34.54        4.1378    0   1   2         4
                21.91          3.06        4.0571    0   2   1         4
                22.06         60.28        4.0295    1   1   1         4
                25.80          2.99        3.4533    1   0   2         4
                26.28         15.69        3.3906    1   2   0         4
                27.54         17.63        3.2388    0   2   2         4
                27.66         94.70        3.2248    1   1   2         4
                28.00        100.00        3.1861    1   2   1         4
                30.45         24.37        2.9357    0   1   3         4
                31.28         49.13        2.8596    0   3   1         4
                32.67          3.61        2.7412    1   2   2         4
                33.71         14.33        2.6586    1   0   3         4
                34.87         36.57        2.5733    2   0   0         2
                35.10          6.13        2.5569    0   2   3         4
                35.93          4.22        2.4996    1   3   1         4
                36.31          2.73        2.4744    2   1   0         4
                37.61          2.38        2.3915    2   1   1         4
                38.66         13.54        2.3287    0   0   4         2
                39.35         24.21        2.2899    1   2   3         4
                39.99         12.23        2.2547    0   1   4         4
                40.01         12.41        2.2535    0   4   0         2
                40.03          1.59        2.2523    2   0   2         4
                41.22          4.68        2.1903    0   4   1         4
                41.32         22.86        2.1852    2   1   2         4
                41.56          3.58        2.1730    2   2   1         4
                41.84         10.45        2.1592    0   3   3         4
                43.84          3.28        2.0652    1   1   4         4
                43.86          7.06        2.0643    1   4   0         4
                44.98          8.17        2.0154    1   4   1         4
                44.99         11.34        2.0148    2   2   2         4
                45.80          1.34        1.9813    2   0   3         4
                46.95         11.98        1.9351    2   1   3         4
                47.36          2.51        1.9196    1   2   4         4
                47.54         24.78        1.9128    2   3   1         4
                48.22          4.82        1.8872    1   4   2         4
                49.52          2.18        1.8406    0   3   4         4
                50.01          7.73        1.8238    0   4   3         4
                50.31          6.00        1.8138    2   2   3         4
                50.65          2.34        1.8022    2   3   2         4
                52.22         10.52        1.7518    1   0   5         4
                52.82         19.36        1.7331    1   3   4         4
                53.04          6.85        1.7267    2   0   4         4
                53.27          7.43        1.7196    1   1   5         4
                54.08          6.28        1.6958    2   1   4         4
                54.10          5.17        1.6953    2   4   0         4
                54.85          1.06        1.6737    1   5   1         4
                55.06          4.27        1.6679    2   4   1         4
                55.40          6.73        1.6583    3   1   1         4
                55.56          6.34        1.6541    2   3   3         4
                56.35          4.18        1.6328    1   2   5         4
                56.86          3.27        1.6194    0   4   4         4
                57.23          2.08        1.6098    3   0   2         4
                57.48          1.66        1.6033    3   2   0         4
                57.68         24.24        1.5981    1   5   2         4
                58.22          7.63        1.5847    3   1   2         4
                58.27          1.67        1.5833    0   3   5         4
                58.41          7.03        1.5801    3   2   1         4
                59.27          2.94        1.5591    0   5   3         4
                59.88          1.33        1.5447    1   4   4         4
                61.13          1.60        1.5160    3   2   2         4
                61.25          1.03        1.5133    1   3   5         4
                61.75          2.23        1.5023    0   6   0         2
                61.78          2.04        1.5016    3   0   3         4
                61.99          1.25        1.4971    2   3   4         4
                62.41          7.75        1.4880    2   4   3         4
                63.21          2.59        1.4711    3   3   1         4
                63.36          6.37        1.4679    0   2   6         4
                63.43          1.42        1.4665    1   1   6         4
                64.63          2.60        1.4421    1   6   0         4
                65.49          1.54        1.4252    1   6   1         4
                65.52          4.16        1.4246    3   2   3         4
                66.21          1.42        1.4116    1   2   6         4
                67.75          3.86        1.3830    1   4   5         4
                68.45          2.24        1.3706    2   4   4         4
                68.77          1.58        1.3650    3   4   0         4
                69.51          1.31        1.3524    0   6   3         4
                69.61          1.66        1.3506    3   4   1         4
                69.74          1.86        1.3485    2   3   5         4
                70.64          2.92        1.3334    2   5   3         4
                71.43          1.30        1.3206    3   2   4         4
                71.69          2.21        1.3164    0   1   7         4
                72.11          1.91        1.3099    3   4   2         4
                72.91          3.03        1.2974    2   6   0         4
                73.03          1.65        1.2955    0   5   5         4
                73.51          1.76        1.2883    1   0   7         4
                73.62          2.72        1.2866    4   0   0         2
                74.37          1.95        1.2756    0   7   1         4
                74.38          2.25        1.2754    1   1   7         4
                74.41          8.50        1.2750    2   2   6         4
                75.28          1.23        1.2624    0   6   4         4
                75.31          2.49        1.2620    3   0   5         4
                75.80          4.61        1.2550    3   3   4         4
                76.17          2.69        1.2498    3   1   5         4
                76.80          1.44        1.2411    0   7   2         4
                76.83          3.85        1.2408    1   4   6         4
                77.02          1.06        1.2381    1   7   1         4
                77.73          1.74        1.2286    4   1   2         4
                77.89          1.07        1.2264    4   2   1         4
                77.92          1.04        1.2261    1   6   4         4
                79.89          6.17        1.2007    3   5   2         4
                80.18          1.95        1.1971    2   6   3         4
                80.80          1.04        1.1895    0   7   3         4
                81.72          1.06        1.1784    4   1   3         4
                82.15          2.96        1.1733    4   3   1         4
                82.26          2.48        1.1720    2   1   7         4
                83.55          2.13        1.1572    2   5   5         4
                84.25          1.74        1.1493    4   2   3         4
                84.84          2.21        1.1429    2   7   1         4
                85.07          2.82        1.1404    1   6   5         4
                85.72          1.75        1.1334    2   6   4         4
                86.40          1.09        1.1262    4   0   4         4
                87.20          1.39        1.1179    2   7   2         4
                87.24          2.01        1.1175    4   1   4         4
                88.88          1.35        1.1011    3   4   5         4
                88.90          2.05        1.1008    1   7   4         4
                89.70          2.59        1.0931    1   8   1         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.