Spertiniite
Diffraction data computed using the structure from the paper listed below,
along with the cell parameters refined from the powder pattern
      Oswald H R, Reller A, Schmalle H W, Dubler E
      Acta Crystallographica C46 (1990) 2279-2284
      Structure of copper(II) hydroxide, Cu(OH)2
      _database_code_amcsd 0010212

      CELL PARAMETERS:   2.932732   10.54512   5.228037   90.00000   90.00000   90.00000
      SPACE GROUP: Cmc2_1
      X-RAY WAVELENGTH:     1.541838
      MAX. ABS. INTENSITY / VOLUME**2:      40.15302649
               2-THETA      INTENSITY    D-SPACING   H   K   L
                 7.53         80.60        5.2726    0   2   0
                10.78        100.00        3.7124    0   2   1
                14.24          5.42        2.8255    1   1   0
                15.41         68.38        2.6140    0   0   2
                16.22         41.61        2.4857    1   1   1
                17.15         15.21        2.3539    0   4   1
                17.23         20.13        2.3420    0   2   2
                17.94         67.33        2.2519    1   3   0
                19.56          8.82        2.0682    1   3   1
                21.12          4.13        1.9188    1   1   2
                23.10          5.45        1.7575    0   6   0
                23.72         19.04        1.7122    1   5   0
                23.81         44.98        1.7061    1   3   2
                24.40          4.22        1.6659    0   6   1
                24.57          9.84        1.6546    0   2   3
                24.99         14.43        1.6272    1   5   1
                27.48         10.78        1.4832    1   1   3
                27.81          8.74        1.4664    2   0   0
                27.96          5.09        1.4585    0   6   2
                28.05          4.53        1.4538    0   4   3
                28.49         17.80        1.4323    1   5   2
                28.89          3.38        1.4127    2   2   0
                29.64          2.25        1.3782    1   3   3
                29.96          7.87        1.3638    2   2   1
                31.03          4.69        1.3181    0   8   0
                31.30          4.23        1.3070    0   0   4
                31.53          6.97        1.2980    1   7   1
                32.01          8.98        1.2789    2   0   2
                32.28          1.69        1.2686    0   2   4
                32.93          4.04        1.2446    2   4   1
                32.97          3.87        1.2429    2   2   2
                33.12          1.69        1.2375    0   6   3
                33.57          4.20        1.2214    1   5   3
                34.89          5.66        1.1770    0   8   2
                36.38          7.28        1.1304    1   3   4
                36.53          1.95        1.1259    2   6   0
                37.41          1.63        1.1007    2   6   1
                37.52          3.79        1.0974    2   2   3
                37.52          3.79        1.0974    2   2   3
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.