Walentaite
      Grey I E, Mumme W G, Hochleitner R
      European Journal of Mineralogy 31 (2019) 111-116
      Trimeric As3+3O6 clusters in walentaite: crystal structure and revised formula
      Locality: White Elephant mine, Pringle, South Dakota, USA
      _database_code_amcsd 0020839

      CELL PARAMETERS:   26.1880   7.3600  10.3670   90.000   90.000   90.000
      SPACE GROUP: Imma      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:   1998.174
      Density (g/cm3):      2.715
      MAX. ABS. INTENSITY / VOLUME**2:      85.44600539    
      RIR:     10.246
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                 6.75        100.00       13.0940    2   0   0         2
                 9.17          3.40        9.6392    1   0   1         4
                13.26          4.77        6.6774    3   0   1         4
                13.52          3.60        6.5470    4   0   0         2
                14.76          2.38        6.0014    0   1   1         4
                16.25          1.72        5.4556    2   1   1         8
                18.41          5.55        4.8196    2   0   2         4
                20.07          6.72        4.4240    4   1   1         8
                25.14          1.15        3.5427    2   2   0         4
                25.31          2.82        3.5190    7   0   1         4
                26.70          2.35        3.3387    6   0   2         4
                29.77         14.43        3.0007    0   2   2         4
                30.56          6.70        2.9249    2   2   2         8
                32.35          5.66        2.7678    8   0   2         4
                34.61          1.48        2.5917    0   0   4         2
                35.29          1.19        2.5433    7   2   1         8
                40.47          1.01        2.2291    9   2   1         8
                40.53          2.92        2.2258    9   0   3         4
                46.31          1.59        1.9605   11   0   3         4
                47.71          1.24        1.9062    6   2   4         8
                49.54          1.69        1.8400    0   4   0         2
                51.37          2.23        1.7788    8   2   4         8
                60.31          1.49        1.5347    9   2   5         8
================================================================================
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.