Romeite
Diffraction data computed using the structute from the paper listed below,
along with the cell parameters refined from single crystal data for R060323
      Zedlitz O
      Zeitschrift fur Kristallographie 81 (1932) 253-263
      Die kristallstruktur von romeit und schneebergit
      Locality: St. Marcel, Piemont, Italy

      CELL PARAMETERS:  10.2720 10.2720 10.2720   90.000   90.000   90.000
      SPACE GROUP: Fd-3m     

           ATOM        X         Y         Z     OCCUPANCY  ISO(B)
            Ca     0.12500   0.12500   0.12500     0.500     1.300
            Na     0.12500   0.12500   0.12500     0.500     1.500
            Sb     0.12500   0.37500   0.87500     1.000     1.000
            O      0.30000   0.00000   0.00000     1.000     1.000
            OH     0.00000   0.50000   0.50000     1.000     1.000

            X-RAY WAVELENGTH:     1.541838
            BOUNDS ON TWO THETA:    5.0  90.0
            LIMITS IMPOSED ON THE INDICES ARE:  +/-  9 +/-  9 +/-  9
            MAX. ABS. INTENSITY / VOLUME**2:      132.0855052    
            The INTENSITY cut off value is   1.00

               2-THETA      INTENSITY    D-SPACING   H   K   L
                14.94         56.44        5.9305    1   1   1
                28.83         38.83        3.0971    3   1   1
                30.14        100.00        2.9653    2   2   2
                34.94         23.78        2.5680    4   0   0
                38.19          3.47        2.3566    3   3   1
                45.91          3.85        1.9768    5   1   1
                45.91          6.99        1.9768    3   3   3
                50.24         45.45        1.8159    4   4   0
                52.72          9.35        1.7363    5   3   1
                58.96          4.96        1.5665    5   3   3
                59.71         34.43        1.5486    6   2   2
                62.66          7.42        1.4826    4   4   4
                64.82          4.40        1.4384    5   5   1
                64.82          1.77        1.4384    7   1   1
                70.41          1.37        1.3373    5   5   3
                70.41          6.54        1.3373    7   3   1
                73.80          5.23        1.2840    8   0   0
                81.08          2.35        1.1861    7   5   1
                81.73         11.57        1.1783    6   6   2
                84.33          8.98        1.1484    8   4   0
                86.27          1.31        1.1275    7   5   3
                86.27          1.14        1.1275    9   1   1
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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.