Gerhardtite
Diffraction data computed using the structure from the paper listed below,
along with the cell parameters refined from single crystal data of R120082
      Bovio B, Locchi S
      Journal of Crystallographic and Spectroscopic Research 12 (1982) 507-517
      Crystal structure of the orthorhombic basic copper nitrate, Cu2(OH)3NO3
      Locality: Kalabi, Jadotville, Katanga
      _database_code_amcsd 0013022

      CELL PARAMETERS:   6.0950 13.7920  5.5550   90.000   90.000   90.000
      SPACE GROUP: P2_12_12_1

           ATOM        X         Y         Z     OCCUPANCY  ISO(B)
            Cu     0.73000   0.24730   0.50090     1.000     0.800
            Cu     0.48200   0.25100   0.00830     1.000     0.797
            O      0.48910   0.13720   0.68820     1.000     1.152
            O      0.62110   0.00400   0.54990     1.000     3.222
            O      0.39290   0.00080   0.85920     1.000     2.312
            N      0.49940   0.04550   0.69490     1.000     1.113
            O      0.48680   0.32250   0.38120     1.000     0.540
            O      0.72600   0.31010   0.82240     1.000     0.420
            O      0.23800   0.31210   0.82350     1.000     0.170
            H      0.45630   0.38550   0.43070     1.000     0.540
            H      0.79250   0.37030   0.79940     1.000     0.420
            H      0.21250   0.37980   0.81560     1.000     0.170

            X-RAY WAVELENGTH:     1.541838
            BOUNDS ON TWO THETA:    5.0  90.0
            LIMITS IMPOSED ON THE INDICES ARE:  +/-  5 +/- 12 +/-  5
            MAX. ABS. INTENSITY / VOLUME**2:      61.68986121    
            The INTENSITY cut off value is   1.00

               2-THETA      INTENSITY    D-SPACING   H   K   L
                12.84        100.00        6.8960    0   2   0
                21.65          3.14        4.1056    1   0   1
                25.25          5.58        3.5277    1   2   1
                25.84         27.25        3.4480    0   4   0
                29.77          1.26        3.0011    1   4   0
                30.51          1.17        2.9295    0   4   1
                32.23          6.95        2.7775    0   0   2
                32.89          1.05        2.7228    0   1   2
                33.54          2.90        2.6718    2   0   1
                34.18         23.16        2.6231    2   1   1
                34.82         15.25        2.5764    0   2   2
                36.05          5.43        2.4914    2   2   1
                37.84          2.23        2.3773    0   3   2
                38.99         26.59        2.3100    2   3   1
                39.19          1.64        2.2987    0   6   0
                41.76         14.00        2.1630    0   4   2
                42.82          4.62        2.1120    2   4   1
                47.37         17.60        1.9191    2   5   1
                51.61          6.32        1.7709    0   6   2
                53.12          2.14        1.7240    0   8   0
                58.18          9.62        1.5857    2   7   1
                58.73         12.27        1.5721    2   1   3
                60.79          2.29        1.5237    4   0   0
                61.20          1.11        1.5145    4   1   0
                62.02          5.48        1.4963    2   3   3
                62.42          4.04        1.4879    4   2   0
                63.51          3.49        1.4648    0   8   2
                68.34          2.94        1.3726    2   5   3
                68.98          1.75        1.3614    0   2   4
                70.89          3.94        1.3293    2   9   1
                72.00          2.75        1.3115    4   2   2
                73.52          1.50        1.2882    0   4   4
                76.47          2.19        1.2457    4   4   2
                77.23          1.22        1.2353    0  10   2
                77.34          1.34        1.2338    2   7   3
                80.87          1.53        1.1887    0   6   4
                83.74          2.07        1.1550    4   6   2
                85.56          1.88        1.1351    2  11   1
                88.90          1.28        1.1009    2   9   3
================================================================================
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.