Nierite
      Kohatsu I, McCauley J W
      Materials Research Bulletin 9 (1974) 917-920
      Re-examination of the crystal structure of alpha-Si3N4
      Locality: synthetic
      _database_code_amcsd 0014238

      CELL PARAMETERS:    7.7660   7.7660   5.6150   90.000   90.000  120.000
      SPACE GROUP: P31c      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    293.275
      Density (g/cm3):      3.126
      MAX. ABS. INTENSITY / VOLUME**2:      7.797402053    
      RIR:      0.812
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                13.16         19.61        6.7256    1   0   0         6
                20.61        100.00        4.3103    1   0   1         6
                22.90         44.74        3.8830    1   1   0         3
                26.51         28.99        3.3628    2   0   0         6
                31.00         93.54        2.8850    2   0   1         6
                31.88          8.24        2.8075    0   0   2         1
                34.62         82.03        2.5908    1   0   2         6
                35.31         87.78        2.5420    2   1   0         6
                38.89         34.52        2.3158    3  -1   1         6
                38.89         14.06        2.3158    2   1   1         6
                39.61          1.42        2.2751    1   1   2         3
                39.61          6.21        2.2751    2  -1   2         3
                40.23          4.47        2.2419    3   0   0         6
                41.92         27.53        2.1551    2   0   2         6
                43.46         38.01        2.0820    3   0   1         6
                46.79          3.10        1.9415    2   2   0         3
                48.30          7.81        1.8844    3  -1   2         6
                48.82          6.46        1.8653    3   1   0         6
                50.62         10.13        1.8031    1   0   3         6
                51.63         16.46        1.7702    3   1   1         6
                56.25          6.21        1.6354    2   0   3         6
                57.73          4.54        1.5969    4  -2   2         3
                57.73         16.90        1.5969    2   2   2         3
                59.50          1.18        1.5537    4  -1   2         6
                59.50          1.58        1.5537    3   1   2         6
                59.95          2.26        1.5429    3   2   0         6
                61.53          4.81        1.5072    2   1   3         6
                62.42         26.68        1.4878    5  -2   1         6
                62.42          1.06        1.4878    3   2   1         6
                64.90         22.42        1.4368    3   0   3         6
                65.77          1.74        1.4199    5  -1   1         6
                65.77         18.98        1.4199    4   1   1         6
                66.62         11.77        1.4037    0   0   4         1
                68.25          3.53        1.3741    1   0   4         6
                69.52         15.64        1.3522    5  -2   2         6
                69.52         12.55        1.3522    3   2   2         6
                69.94          1.06        1.3451    5   0   0         6
                71.39          2.71        1.3212    3   1   3         6
                71.39          3.52        1.3212    4  -1   3         6
                71.46          4.14        1.3201    1   1   4         3
                72.22          4.70        1.3081    5   0   1         6
                72.70          4.97        1.3006    4   1   2         6
                72.70         12.10        1.3006    5  -1   2         6
                73.04          3.51        1.2954    2   0   4         6
                73.11         10.04        1.2943    3   3   0         3
                74.68          2.27        1.2710    4   2   0         6
                76.91          4.81        1.2396    4   2   1         6
                77.71          3.00        1.2288    3  -1   4         6
                77.71          5.11        1.2288    2   1   4         6
                78.92          2.24        1.2131    5   0   2         6
                79.32          1.23        1.2079    5   1   0         6
                80.71          1.69        1.1906    5  -2   3         6
                80.71          7.80        1.1906    3   2   3         6
                81.51          5.04        1.1809    6  -1   1         6
                83.49          2.80        1.1579    4   2   2         6
                83.75          5.99        1.1549    5  -1   3         6
                86.84          1.42        1.1216    4  -1   4         6
                88.02          2.73        1.1096    6  -1   2         6
                89.79          1.01        1.0923    5   0   3         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.