Abelsonite
      Hummer D R, Noll B C, Hazen R M, Downs R T
      American Mineralogist 102 (2017) 1129-1132
      Crystal structure of abelsonite, the only known crystalline geoporphyrin
      Note: T = 100 K
      Locality: Green River formation, Uintah County, Utah, USA
      _database_code_amcsd 0020838

      CELL PARAMETERS:    8.4416  10.8919   7.2749   90.465  113.158   78.080
      SPACE GROUP: P-1       
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    599.743
      Density (g/cm3):      1.437
      MAX. ABS. INTENSITY / VOLUME**2:      9.957283667    
      RIR:      2.256
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                 8.32        100.00       10.6218    0   1   0         2
                11.69         25.89        7.5692    1   0   0         2
                12.77          3.63        6.9312    1   1   0         2
                13.28         17.58        6.6666    0   0   1         2
                15.28          2.00        5.7979   -1  -1   1         2
                15.81         18.96        5.6060   -1   1   0         2
                16.26         15.28        5.4506    0  -1   1         2
                16.86          1.97        5.2587   -1   1   1         2
                18.16          2.83        4.8851    1   2   0         2
                20.47          2.59        4.3383   -1  -2   1         2
                20.99          4.11        4.2327    1   0   1         2
                22.23          2.18        3.9985    0  -2   1         2
                22.84          2.80        3.8937   -1   2   1         2
                23.14          1.90        3.8440    2   1   0         2
                23.96         62.59        3.7144    1  -1   1         2
                24.50          2.70        3.6338   -1   0   2         2
                24.89          3.03        3.5768   -2   1   1         2
                24.97          1.63        3.5663   -2  -2   1         2
                25.30          1.30        3.5197    1   3   0         2
                27.38          1.02        3.2569    0   1   2         2
                29.19         12.10        3.0590    1  -2   1         2
                29.85          1.57        2.9928   -2   1   2         2
                30.04          1.94        2.9747   -1   2   2         2
                30.21          2.12        2.9587   -2  -3   1         2
                30.52          1.93        2.9288    2   3   0         2
                34.29          2.35        2.6153    2  -1   1         2
                34.61          2.46        2.5919   -3  -1   2         2
                35.35          1.66        2.5389    0   4   1         2
                36.80          1.12        2.4425    2   4   0         2
                36.97          1.13        2.4315   -3  -3   1         2
                38.85          1.10        2.3181    2  -2   1         2
                39.28          1.24        2.2934   -2   1   3         2
                39.79          1.53        2.2656    1  -2   2         2
                41.50          1.06        2.1760   -3   2   2         2
                49.05          1.77        1.8572    2  -2   2         2
                54.25          1.28        1.6907    2  -3   2         2
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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.