Arsenic
      Schiferl D, Barrett CS
      Journal of Applied Crystallography 2 (1969) 30-36
      The crystal structure of arsenic at 4.2, 78 and 299 K
      Sample: T = 78 K
      _database_code_amcsd 0012834

      CELL PARAMETERS:    3.7595   3.7595  10.4573   90.000   90.000  120.000
      SPACE GROUP: R-3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    128.000
      Density (g/cm3):      5.831
      MAX. ABS. INTENSITY / VOLUME**2:      198.8026712    
      RIR:     11.102
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                25.55         11.44        3.4858    0   0   3         2
                28.72          2.97        3.1086    1   0   1         6
                32.39        100.00        2.7638    0   1   2         6
                44.44         31.30        2.0385    1   0   4         6
                48.42         33.83        1.8798    1   1   0         6
                51.97         11.44        1.7597    0   1   5         6
                52.50          3.85        1.7429    0   0   6         2
                55.54          7.46        1.6545    1   1   3        12
                59.47         16.41        1.5543    2   0   2         6
                67.82          8.36        1.3819    0   2   4         6
                69.19          7.67        1.3578    1   0   7         6
                73.76          3.80        1.2846    2   0   5         6
                74.20          7.79        1.2781    1   1   6        12
                78.92          1.36        1.2130    0   1   8         6
                80.12          4.38        1.1979    1   2   2        12
                83.13          1.96        1.1619    0   0   9         2
                87.64          2.70        1.1134    2   1   4        12
                88.92          3.83        1.1007    0   2   7         6
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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.