Spinel
      Peterson R C, Lager G A, Hitterman R L
      American Mineralogist 76 (1991) 1455-1458
      A time-of-flight neutron powder diffraction study of MgAl2O4 at temperatures
      up to 1273 K
      sample UC, T = 923 K
      _database_code_amcsd 0001401

      CELL PARAMETERS:    8.1251   8.1251   8.1251   90.000   90.000   90.000
      SPACE GROUP: Fd3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    536.393
      Density (g/cm3):      3.523
      MAX. ABS. INTENSITY / VOLUME**2:      17.71643270    
      RIR:      1.637
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                18.92         33.20        4.6910    1   1   1         8
                31.13         34.23        2.8726    2   2   0        12
                36.68        100.00        2.4498    3   1   1        24
                38.38          1.38        2.3455    2   2   2         8
                44.61         55.80        2.0313    4   0   0         6
                55.40          9.14        1.6585    4   2   2        24
                59.08          2.83        1.5637    3   3   3         8
                59.08         41.65        1.5637    5   1   1        24
                64.92         67.58        1.4363    4   4   0        12
                68.30          2.67        1.3734    5   3   1        48
                73.75          2.72        1.2847    6   2   0        24
                76.95          8.98        1.2391    5   3   3        24
                82.20          5.76        1.1728    4   4   4         8
                85.31          2.34        1.1377    5   5   1        24
================================================================================
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.