Kalsilite
      Cellai D, Bonazzi P, Carpenter M A
      American Mineralogist 82 (1997) 276-279
      Natural kalsilite, KAlSiO4, with P31c symmetry: Crystal structure and twinning
      _database_code_amcsd 0001874

      CELL PARAMETERS:    5.1570   5.1570   8.7060   90.000   90.000  120.000
      SPACE GROUP: P31c      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    200.513
      Density (g/cm3):      2.619
      MAX. ABS. INTENSITY / VOLUME**2:      17.52383540    
      RIR:      2.178
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                19.88          1.23        4.4661    1   0   0         6
                20.40         14.57        4.3530    0   0   2         1
                22.37         55.26        3.9737    1   0   1         6
                28.64        100.00        3.1173    1   0   2         6
                34.79         69.82        2.5785    1   1   0         3
                36.94         11.31        2.4334    1   0   3         6
                40.39          2.80        2.2330    2   0   0         6
                40.67         10.11        2.2185    2  -1   2         3
                40.67         11.55        2.2185    1   1   2         3
                41.49         15.84        2.1765    0   0   4         1
                41.76          7.90        2.1630    2   0   1         6
                45.66          6.46        1.9869    2   0   2         6
                46.41          2.58        1.9565    1   0   4         6
                51.65          4.65        1.7697    2   0   3         6
                55.23          3.47        1.6632    1   1   4         3
                55.23          4.05        1.6632    2  -1   4         3
                55.45          2.13        1.6572    3  -1   1         6
                55.45          3.57        1.6572    2   1   1         6
                56.75         10.54        1.6223    1   0   5         6
                58.66          8.17        1.5738    3  -1   2         6
                58.66          8.30        1.5738    2   1   2         6
                59.29          5.36        1.5586    2   0   4         6
                62.38         18.75        1.4887    3   0   0         6
                63.79          2.12        1.4591    3  -1   3         6
                63.79          3.12        1.4591    2   1   3         6
                68.31          5.43        1.3731    2   0   5         6
                70.61          1.30        1.3339    3  -1   4         6
                70.61          1.20        1.3339    2   1   4         6
                73.45          6.17        1.2893    2   2   0         3
                75.13          5.80        1.2645    1   1   6         3
                75.13          5.52        1.2645    2  -1   6         3
                77.72          5.25        1.2288    3   0   4         6
                79.00          3.68        1.2120    2   1   5         6
                79.00          2.98        1.2120    3  -1   5         6
                80.64          4.23        1.1914    4  -1   2         6
                80.64          4.18        1.1914    3   1   2         6
                85.17          1.18        1.1392    4  -1   3         6
                85.17          1.21        1.1392    3   1   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.