Forsterite
      Henderson C M B, Redfern S A T, Smith R I, Knight K S, Charnock J M
      American Mineralogist 86 (2001) 1170-1187
      Composition and temperature dependence of cation ordering in Ni-Mg olivine solid solutions:
      A time-of-flight neutron powder diffraction and EXAFS study
      Sample: Mg50Ni50 at T = 750 C, on cooling
      _database_code_amcsd 0002699

      CELL PARAMETERS:    4.7709  10.2828   5.9980   90.000   90.000   90.000
      SPACE GROUP: Pbnm      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    294.249
      Density (g/cm3):      3.952
      MAX. ABS. INTENSITY / VOLUME**2:      18.02756383    
      RIR:      1.485
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                17.25         38.96        5.1414    0   2   0         2
                20.52         16.90        4.3278    1   1   0         4
                22.78         21.01        3.9035    0   2   1         4
                23.83          8.44        3.7338    1   0   1         4
                25.38         20.36        3.5096    1   1   1         8
                25.47          6.32        3.4972    1   2   0         4
                29.57          3.32        3.0212    1   2   1         8
                29.79          1.20        2.9990    0   0   2         2
                32.16         71.16        2.7837    1   3   0         4
                34.63         17.20        2.5905    0   2   2         4
                34.90          5.32        2.5707    0   4   0         2
                35.55         45.15        2.5250    1   3   1         8
                36.45        100.00        2.4650    1   1   2         8
                37.71          7.03        2.3855    2   0   0         2
                38.09          7.65        2.3628    0   4   1         4
                38.75          4.30        2.3237    2   1   0         4
                39.59         16.76        2.2765    1   2   2         8
                39.83         11.15        2.2631    1   4   0         4
                41.68          7.80        2.1668    2   1   1         8
                41.74          2.79        2.1639    2   2   0         4
                44.40         12.60        2.0402    1   3   2         8
                46.37          1.26        1.9580    2   3   0         4
                46.53          4.86        1.9518    0   4   2         4
                48.18          7.81        1.8886    1   5   0         4
                50.27          3.41        1.8150    1   1   3         8
                50.68          2.46        1.8014    1   5   1         8
                52.12         56.71        1.7548    2   2   2         8
                52.32         20.71        1.7486    2   4   0         4
                52.74          1.90        1.7357    1   2   3         8
                54.68          7.22        1.6787    2   4   1         8
                55.79          6.74        1.6479    0   6   1         4
                56.10          1.16        1.6395    2   3   2         8
                56.68         10.05        1.6239    1   3   3         8
                57.68         10.25        1.5981    1   5   2         8
                58.48          4.48        1.5782    0   4   3         4
                58.75          4.70        1.5716    3   1   0         4
                60.94          2.41        1.5203    3   1   1         8
                61.15          1.51        1.5156    2   1   3         8
                61.37          5.90        1.5106    2   4   2         8
                61.51          2.29        1.5076    2   5   1         8
                61.88         17.60        1.4995    0   0   4         2
                62.41         25.67        1.4880    0   6   2         4
                64.61          4.55        1.4426    3   3   0         4
                64.76          1.79        1.4395    0   2   4         4
                65.93          1.11        1.4169    1   1   4         8
                66.61         10.06        1.4039    1   7   0         4
                66.68          3.83        1.4026    3   3   1         8
                67.26          8.55        1.3921    3   1   2         8
                69.34          7.50        1.3553    3   2   2         8
                69.50          2.57        1.3524    3   4   0         4
                71.46          9.16        1.3201    1   3   4         8
                71.51          1.78        1.3193    3   4   1         8
                71.71          1.07        1.3162    2   4   3         8
                72.67          2.11        1.3012    0   6   3         4
                73.05          1.37        1.2952    0   4   4         4
                74.78          2.94        1.2695    2   0   4         4
                75.27          3.45        1.2625    2   6   2         8
                75.58          1.00        1.2580    3   5   0         4
                77.72          1.20        1.2287    2   5   3         8
                80.53          3.41        1.1927    4   0   0         2
                81.47          1.35        1.1814    0   8   2         4
                82.06          2.68        1.1743    1   5   4         8
                82.45          1.78        1.1699    3   3   3         8
                83.29          5.10        1.1601    3   5   2         8
                84.71          1.15        1.1443    3   6   1         8
                85.26          5.59        1.1383    2   4   4         8
                85.89          2.36        1.1315    2   8   0         4
                86.97          1.54        1.1202    3   4   3         8
                88.82          2.28        1.1017    1   3   5         8
================================================================================
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.