Rubidium
      Kelly F M, Pearson W B
      Canadian Journal of Physics 33 (1955) 17-24
      The rubidium transition at ~180 K
      Locality: synthetic
      Sample: at T = 297 K
      Note: specimen IV lattice parameter for this T is estimated
      _database_code_amcsd 0012173

      CELL PARAMETERS:    5.6970   5.6970   5.6970   90.000   90.000   90.000
      SPACE GROUP: Im3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    184.901
      Density (g/cm3):      1.535
      MAX. ABS. INTENSITY / VOLUME**2:      74.68737430    
      RIR:     15.844
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                22.07        100.00        4.0284    1   1   0        12
                31.40         19.55        2.8485    2   0   0         6
                38.72         41.87        2.3258    2   1   1        24
                45.01         12.85        2.0142    2   2   0        12
                50.67         17.12        1.8015    3   1   0        24
                55.91          4.02        1.6446    2   2   2         8
                60.84         17.74        1.5226    3   2   1        48
                65.54          1.69        1.4243    4   0   0         6
                70.08          2.65        1.3428    3   3   0        12
                70.08          5.29        1.3428    4   1   1        24
                74.48          4.26        1.2739    4   2   0        24
                78.80          3.51        1.2146    3   3   2        24
                83.05          2.97        1.1629    4   2   2        24
                87.26          5.12        1.1173    4   3   1        48
                87.26          2.56        1.1173    5   1   0        24
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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.