Isomertieite
      Shi N, Ma Z, Zhang N, Ding X
      Kexue Tongbao 23 (1978) 499-501
      Crystal structure of isomertieite (fengluanite)
      _database_code_amcsd 0014175

      CELL PARAMETERS:   12.2800  12.2800  12.2800   90.000   90.000   90.000
      SPACE GROUP: Fd3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:   1851.804
      Density (g/cm3):     10.455
      MAX. ABS. INTENSITY / VOLUME**2:      381.6128007    
      RIR:     11.885
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                12.48         11.42        7.0899    1   1   1         8
                20.46          8.06        4.3416    2   2   0        12
                35.82         19.20        2.5066    4   2   2        24
                38.08         36.23        2.3633    5   1   1        24
                38.08         13.90        2.3633    3   3   3         8
                41.60        100.00        2.1708    4   4   0        12
                44.26          5.93        2.0467    4   4   2        24
                46.79          8.39        1.9416    6   2   0        24
                49.22          7.34        1.8513    6   2   2        24
                57.66          2.17        1.5987    5   5   3        24
                57.66          8.48        1.5987    7   3   1        48
                60.29          7.85        1.5350    8   0   0         6
                64.38          4.13        1.4472    8   2   2        24
                64.38          2.08        1.4472    6   6   0        12
                65.87          4.25        1.4180    5   5   5         8
                66.36          4.24        1.4086    6   6   2        24
                69.77          1.45        1.3479    7   5   3        48
                70.25          4.21        1.3399    8   4   2        48
                72.16          2.64        1.3091    6   6   4        24
                73.58          4.02        1.2873    9   3   1        48
                75.92         12.52        1.2533    8   4   4        24
                77.31          1.57        1.2342    9   3   3        24
                77.31          1.51        1.2342    7   7   1        24
                77.31          1.01        1.2342    7   5   5        24
                79.62          1.97        1.2042    8   6   2        48
                80.99          4.72        1.1872    9   5   1        48
                80.99          3.30        1.1872    7   7   3        24
                81.45          5.45        1.1816   10   2   2        24
                84.63          1.11        1.1451    9   5   3        48
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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.