(NH4)2(VO)(VP)O7
      Boudin S, Grandin A, Labbe P, Raveau B
      Acta Crystallographica C52 (1996) 2668-2670
      (NH4)2(VO)(VP)O7, a layered structure comprising tetrahedral VPO7 groups
      _cod_database_code 1001731
      _database_code_amcsd 0010309

      CELL PARAMETERS:    8.6233   8.6233   5.6384   90.000   90.000   90.000
      SPACE GROUP: P4bm      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    419.279
      Density (g/cm3):      2.285
      MAX. ABS. INTENSITY / VOLUME**2:      21.47268814    
      RIR:      3.060
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                15.72        100.00        5.6384    0   0   1         1
                20.60          9.73        4.3116    2   0   0         4
                21.46          2.48        4.1398    1   1   1         4
                23.06         39.19        3.8565    2   1   0         8
                26.02         16.38        3.4250    2   0   1         4
                28.03         55.23        3.1831    2   1   1         8
                29.29          6.03        3.0488    2   2   0         4
                31.74         15.50        2.8192    0   0   2         1
                32.84         21.96        2.7269    3   1   0         8
                33.41          2.92        2.6818    2   2   1         4
                36.60         14.50        2.4549    3   1   1         8
                37.61          2.03        2.3917    3   2   0         8
                39.60          3.61        2.2759    2   1   2         8
                40.99          4.16        2.2018    3   2   1         8
                41.91          1.02        2.1558    4   0   0         4
                43.26          1.88        2.0915    4   1   0         8
                43.73          1.46        2.0699    2   2   2         4
                46.30          1.16        1.9609    4   1   1         8
                46.32          6.67        1.9600    3   1   2         8
                47.13          7.61        1.9282    4   2   0         8
                48.43          3.83        1.8795    0   0   3         1
                49.99          5.57        1.8245    4   2   1         8
                50.01          1.39        1.8238    3   2   2         8
                53.16          1.66        1.7229    2   0   3         4
                54.24          4.57        1.6912    5   1   0         8
                54.30          5.38        1.6895    2   1   3         8
                56.84          5.38        1.6199    5   1   1         8
                57.56          2.19        1.6013    5   2   0         8
                57.61          1.09        1.5999    2   2   3         4
                57.94          2.49        1.5916    4   2   2         8
                59.76          6.79        1.5475    3   1   3         8
                60.06          3.67        1.5404    5   2   1         8
                60.76          4.02        1.5244    4   4   0         4
                62.89          2.36        1.4778    3   2   3         8
                63.19          3.70        1.4716    4   4   1         4
                64.22          1.57        1.4502    5   1   2         8
                65.88          1.60        1.4177    6   1   0         8
                68.21          1.40        1.3749    6   1   1         8
                68.86          1.16        1.3635    6   2   0         8
                69.89          1.28        1.3459    4   2   3         8
                70.19          1.65        1.3409    4   4   2         4
                71.14          1.88        1.3253    6   2   1         8
                73.70          1.01        1.2855    6   3   0         8
                75.65          2.24        1.2572    5   1   3         8
                75.92          1.02        1.2533    6   3   1         8
                76.00          4.46        1.2522    3   1   4         8
                78.47          1.55        1.2189    5   2   3         8
                78.81          1.56        1.2144    3   2   4         8
                81.26          2.11        1.1839    4   4   3         4
                85.82          1.53        1.1323    7   3   0         8
                87.97          1.52        1.1101    7   3   1         8
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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.