Valentinite
Diffraction data computed using the structure from the paper listed below,
along with the cell parameters refined from single crystal data of R120096
      Svensson C
      Acta Crystallographica B30 (1974) 458-461
      The crystal structure of orthorhombic antimony trioxide, Sb2O3
      Locality: synthetic
      _database_code_amcsd 0009500

      CELL PARAMETERS:   4.9200 12.4840  5.4185   90.000   90.000   90.000
      SPACE GROUP: Pccn      

           ATOM        X         Y         Z     OCCUPANCY  ISO(B)
            Sb     0.04149   0.12745   0.17845     1.000     0.998
            O      0.25000   0.25000   0.02290     1.000     1.275
            O      0.15200   0.05910  -0.14460     1.000     1.030

            X-RAY WAVELENGTH:     1.541838
            BOUNDS ON TWO THETA:    5.0  90.0
            LIMITS IMPOSED ON THE INDICES ARE:  +/-  4 +/- 11 +/-  4
            MAX. ABS. INTENSITY / VOLUME**2:      172.4118062    
            The INTENSITY cut off value is   1.00

               2-THETA      INTENSITY    D-SPACING   H   K   L
                19.39         18.06        4.5774    1   1   0
                25.47         22.73        3.4967    1   1   1
                28.08          3.26        3.1773    1   3   0
                28.37        100.00        3.1460    1   2   1
                28.60         29.99        3.1210    0   4   0
                32.67          8.28        2.7408    1   3   1
                33.06          8.38        2.7092    0   0   2
                33.86         12.78        2.6476    0   1   2
                36.53         10.30        2.4600    2   0   0
                39.70          4.37        2.2705    0   3   2
                40.93          2.52        2.2048    2   1   1
                42.90          3.17        2.1083    2   2   1
                43.92          1.51        2.0615    1   3   2
                43.97          3.37        2.0594    1   5   1
                44.27          9.30        2.0459    0   4   2
                46.02          4.96        1.9724    2   3   1
                47.03         14.40        1.9320    2   4   0
                48.17          1.14        1.8891    1   4   2
                49.65          6.65        1.8360    0   5   2
                50.09          4.67        1.8212    2   0   2
                50.52         21.83        1.8067    1   6   1
                50.65          6.14        1.8022    2   1   2
                54.63         10.32        1.6801    1   1   3
                55.04          5.08        1.6684    2   3   2
                55.08          1.42        1.6673    2   5   1
                56.60          1.92        1.6260    3   1   0
                57.54          1.46        1.6017    1   7   1
                58.69          3.77        1.5730    2   4   2
                58.81          7.09        1.5702    1   3   3
                59.21          3.38        1.5605    0   8   0
                60.70          2.18        1.5258    3   3   0
                60.85          6.77        1.5223    3   2   1
                62.33          2.02        1.4896    0   7   2
                63.19          3.04        1.4714    2   5   2
                65.88          3.18        1.4178    2   2   3
                66.66          1.33        1.4030    3   0   2
                66.68          4.03        1.4027    1   5   3
                67.08          1.73        1.3952    2   7   1
                67.14          1.33        1.3942    3   1   2
                68.44          1.45        1.3707    3   5   0
                69.52          1.32        1.3522    0   8   2
                69.84          1.87        1.3467    0   1   4
                71.61          2.85        1.3177    2   8   0
                73.52          1.50        1.2881    0   3   4
                74.09          2.28        1.2796    3   4   2
                74.46          1.10        1.2742    2   7   2
                75.94          2.19        1.2531    3   6   1
                77.27          1.34        1.2347    0   9   2
                77.71          2.91        1.2288    1   7   3
                80.43          1.87        1.1940    4   1   1
                80.70          1.76        1.1907    0   5   4
                81.17          1.83        1.1850    2   8   2
                81.48          2.13        1.1813    2   1   4
                81.50          4.10        1.1810    1  10   1
                82.82          1.50        1.1656    3   3   3
                83.96          1.48        1.1526    4   3   1
                85.00          1.45        1.1411    2   3   4
                88.63          1.14        1.1035    2   9   2
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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.