Behierite
Diffraction data computed using the structure from the paper listed below, 
along with the cell parameters refined from the powder pattern of R060657
      Range K J, Wildenauer M, Heyns A M
      Angewandte Chemie 100 (1988) 973-975
      Extrem kurze nichtbindende sauerstoff-sauerstoff-abstande: Die
      kristallstrukturen von NbBO4, NaNb3O8 und NaTa3O8
      Locality: synthetic
      Note: data from ICSD

      CELL PARAMETERS:   6.2150  6.2150  5.4800   90.000   90.000   90.000
      ALTERNATE SETTING FOR SPACE GROUP: I4_1/amd  

           ATOM        X         Y         Z     OCCUPANCY  ISO(B)
            Nb     0.00000   0.75000   0.12500     1.000     0.105
            B      0.00000   0.25000   0.37500     1.000     0.376
            O      0.00000   0.07120   0.19940     1.000     0.292

            X-RAY WAVELENGTH:     1.541838
            BOUNDS ON TWO THETA:    0.0  90.0
            LIMITS IMPOSED ON THE INDICES ARE:  +/-  5 +/-  5 +/-  5
            MAX. ABS. INTENSITY / VOLUME**2:      74.79424031    
            The INTENSITY cut off value is   1.00

               2-THETA      INTENSITY    D-SPACING   H   K   L
                21.62         97.49        4.1104    1   0   1
                28.73        100.00        3.1075    2   0   0
                36.24         27.26        2.4788    2   1   1
                38.73         47.96        2.3251    1   1   2
                41.08         10.85        2.1973    2   2   0
                44.06          7.08        2.0552    2   0   2
                46.88         36.12        1.9378    3   0   1
                52.19         22.69        1.7525    1   0   3
                55.92         29.01        1.6443    3   2   1
                57.73         46.87        1.5970    3   1   2
                59.49         13.12        1.5538    4   0   0
                60.67         10.28        1.5265    2   1   3
                64.07          7.09        1.4534    4   1   1
                67.38          7.74        1.3897    4   2   0
                68.48          5.38        1.3701    3   0   3
                68.49          2.15        1.3700    0   0   4
                73.28         15.40        1.2919    3   3   2
                75.89          2.42        1.2537    3   2   3
                75.90          8.24        1.2536    2   0   4
                78.98         10.23        1.2122    4   3   1
                78.98          2.13        1.2122    5   0   1
                83.07          5.56        1.1626    4   1   3
                83.08          8.05        1.1625    2   2   4
                86.10          2.24        1.1293    5   2   1
                86.62          1.02        1.1239    3   1   4
                87.62          8.87        1.1136    5   1   2
                89.12          2.47        1.0987    4   4   0
================================================================================
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.