Natronambulite
      Nagashima M, Armbruster T, Kolitsch U, Pettke T
      American Mineralogist 99 (2014) 1462-1470
      The relation between Li <-> Na substitution and hydrogen bonding in five-periodic
      single-chain silicates nambulite and marsturite: A single-crystal X-ray study
      Locality: Gozaisho mine, Iwaki, Japan
      _database_code_amcsd 0020224

      CELL PARAMETERS:    7.6115  11.7340   6.7324   92.876   94.846  106.650
      SPACE GROUP: P-1       
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    572.278
      Density (g/cm3):      3.539
      MAX. ABS. INTENSITY / VOLUME**2:      8.554864760    
      RIR:      0.787
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                 7.89          4.42       11.2079    0   1   0         2
                12.20          1.08        7.2534    1   0   0         2
                12.45         23.25        7.1103   -1   1   0         2
                13.24         22.64        6.6879    0   0   1         2
                15.81          1.83        5.6039    0   2   0         2
                17.08          4.44        5.1914   -1   0   1         2
                18.68         14.94        4.7502    1  -1   1         2
                21.54          2.46        4.1264   -1   2   1         2
                22.71          1.10        3.9155    1   2   0         2
                23.38          3.69        3.8044   -1   3   0         2
                23.47          3.09        3.7901   -2   1   0         2
                24.55          1.14        3.6267    2   0   0         2
                25.05         13.94        3.5551   -2   2   0         2
                25.06          1.89        3.5541   -1  -2   1         2
                26.66         10.16        3.3440    0   0   2         2
                26.66          4.75        3.3432    1  -3   1         2
                26.72          8.61        3.3358   -2   0   1         2
                27.26          2.85        3.2717   -1   3   1         2
                27.98          2.65        3.1884    2   1   0         2
                27.99          2.48        3.1877    2  -1   1         2
                28.21         43.87        3.1636   -1   0   2         2
                28.25          1.41        3.1585    0   3   1         2
                28.44         20.61        3.1381    0   1   2         2
                28.87         10.25        3.0927   -2   3   0         2
                28.91          7.60        3.0883   -1   1   2         2
                29.05         35.21        3.0738    2  -2   1         2
                29.65          1.05        3.0134   -2  -1   1         2
                29.75         23.77        3.0027   -1  -1   2         2
                29.93          2.83        2.9852    1   3   0         2
                30.03         17.97        2.9754    0  -2   2         2
                30.12         55.48        2.9674    1  -1   2         2
                30.57          1.88        2.9241    1   0   2         2
                30.66        100.00        2.9157   -1   4   0         2
                31.58          2.00        2.8327   -2   3   1         2
                31.78          2.36        2.8160    1  -2   2         2
                32.17          1.14        2.7822    2  -3   1         2
                33.03          1.58        2.7123    1  -4   1         2
                33.07          3.52        2.7090    1   1   2         2
                33.11         92.54        2.7054    2   2   0         2
                33.70          2.11        2.6592    0  -4   1         2
                34.03         23.68        2.6349   -1   4   1         2
                34.28         29.20        2.6157   -2   1   2         2
                34.30          8.43        2.6144   -2  -2   1         2
                34.55          2.97        2.5957   -2   0   2         2
                35.63          7.31        2.5201   -3   1   0         2
                35.90         23.21        2.5017   -3   2   0         2
                37.23         18.78        2.4148    1   2   2         2
                37.25          1.69        2.4136    2   2   1         2
                37.46          1.61        2.4006   -3   2   1         2
                37.47          5.07        2.4004    0   3   2         2
                37.88          2.63        2.3751    2  -2   2         2
                37.96          2.43        2.3701   -3   3   0         2
                38.25          2.50        2.3527   -1  -3   2         2
                38.41          1.13        2.3435   -1   5   0         2
                38.46          1.74        2.3409    2   0   2         2
                39.33          2.30        2.2910    3  -1   1         2
                40.16          1.10        2.2456    1  -5   1         2
                40.18          1.22        2.2443    2  -3   2         2
                40.35         20.07        2.2351    0  -4   2         2
                40.40         12.83        2.2328    3   1   0         2
                40.41          1.61        2.2322   -2  -2   2         2
                40.64          3.93        2.2198    0  -1   3         2
                40.67         22.74        2.2186   -2   5   0         2
                41.11         30.70        2.1956   -1   0   3         2
                41.38          1.14        2.1818    1   4   1         2
                41.48          1.74        2.1771    0  -5   1         2
                41.60          4.09        2.1709   -3   4   0         2
                41.91          1.20        2.1558   -1   4   2         2
                41.93          1.39        2.1546    0   1   3         2
                42.46          1.64        2.1292    0  -2   3         2
                42.76         13.63        2.1145    2  -5   1         2
                43.19          1.94        2.0947    2   3   1         2
                43.59          5.10        2.0763   -3   2   2         2
                44.16         20.13        2.0506    3   1   1         2
                45.49          5.31        1.9940   -2   1   3         2
                47.01          5.46        1.9329    0  -5   2         2
                48.20          1.05        1.8880    3  -3   2         2
                48.45          2.56        1.8787   -4   1   0         2
                48.50          6.40        1.8772   -1   5   2         2
                48.95          1.75        1.8607    2  -5   2         2
                49.01          3.95        1.8585   -4   3   0         2
                49.03          1.06        1.8579    1   4   2         2
                49.20          1.71        1.8519    0   3   3         2
                49.21          2.81        1.8516    1   2   3         2
                49.63          2.15        1.8370   -2   5   2         2
                49.86          3.59        1.8291   -2   3   3         2
                49.94          1.32        1.8263   -2  -2   3         2
                50.05          2.65        1.8225   -4   3   1         2
                50.10          3.67        1.8209   -3  -2   2         2
                50.28          1.12        1.8148    0  -4   3         2
                50.32          1.79        1.8133    4   0   0         2
                50.81          4.80        1.7968    2   3   2         2
                50.88          1.64        1.7945    3  -4   2         2
                51.42          2.92        1.7770   -2  -4   2         2
                51.69          3.97        1.7685    3   1   2         2
                51.94          3.23        1.7604    4  -3   1         2
                52.69          4.03        1.7372    2   1   3         2
                52.91          1.34        1.7305   -3   0   3         2
                53.72          5.04        1.7062    4   0   1         2
                53.77          1.21        1.7048   -4  -1   1         2
                53.98          5.95        1.6988   -2   4   3         2
                54.01         11.32        1.6978   -3   5   2         2
                54.16         26.68        1.6934    1   6   0         2
                54.35         10.08        1.6881    3  -6   1         2
                54.88         16.60        1.6728    0  -1   4         2
                54.91          1.05        1.6720    0   0   4         2
                54.93          1.10        1.6716    2  -6   2         2
                55.00          6.27        1.6694   -3  -3   2         2
                55.05          1.29        1.6681   -4   5   0         2
                55.06          2.04        1.6679   -4   0   2         2
                55.51          7.02        1.6554    1  -5   3         2
                56.17          2.30        1.6375    0  -2   4         2
                57.38          6.66        1.6058    1   6   1         2
                57.57          2.26        1.6011    0   7   0         2
                57.72         10.98        1.5971   -4  -1   2         2
                57.93          2.73        1.5919    1  -2   4         2
                58.08          5.14        1.5882   -3  -2   3         2
                58.27          7.42        1.5834    3  -3   3         2
                58.44          3.74        1.5792    0   6   2         2
                58.49          3.53        1.5780   -2   1   4         2
                59.72          1.97        1.5484   -3   6   2         2
                59.81          1.16        1.5464   -4   6   0         2
                59.82          4.86        1.5462    3  -6   2         2
                60.55          6.93        1.5292    4   0   2         2
                61.07          1.71        1.5174   -3   7   1         2
                61.10          2.34        1.5167   -1   3   4         2
                61.20          3.09        1.5145   -4   6   1         2
                61.55          1.43        1.5067   -4  -2   2         2
                61.59          2.35        1.5058   -4   2   3         2
                61.73          1.58        1.5027    2  -7   2         2
                62.07          1.31        1.4954   -5   1   0         2
                62.31          1.76        1.4900    0  -7   2         2
                62.42          1.46        1.4877    0  -4   4         2
                62.77          9.84        1.4803   -3   5   3         2
                63.67          1.64        1.4615   -5   4   1         2
                63.72          3.14        1.4605   -1   7   2         2
                63.99          1.14        1.4550   -3   1   4         2
                64.13          3.84        1.4522    2   5   2         2
                64.20          1.53        1.4507    5   0   0         2
                64.28          2.72        1.4491   -5   0   1         2
                64.39          1.79        1.4469   -3   0   4         2
                64.64          1.54        1.4419    1  -8   1         2
                64.76          1.14        1.4396   -1  -4   4         2
                64.92          4.51        1.4364   -4  -1   3         2
                65.28          2.18        1.4293   -2  -3   4         2
                65.54          1.23        1.4243   -4   7   0         2
                65.63         15.94        1.4226    5  -4   1         2
                65.79          5.88        1.4194   -2  -6   2         2
                65.94          1.55        1.4166   -5   3   2         2
                65.95         16.15        1.4164    2   1   4         2
                66.14          2.95        1.4128   -2   8   1         2
                66.71          1.14        1.4022    0   7   2         2
                67.20         10.26        1.3931    1  -5   4         2
                67.28          1.92        1.3917    3   4   2         2
                67.43          1.01        1.3890    0   4   4         2
                67.62          2.45        1.3854   -3  -5   2         2
                67.93          1.43        1.3798    0   6   3         2
                68.70          1.62        1.3663    1  -8   2         2
                69.49          2.02        1.3527    4   4   0         2
                69.64          1.54        1.3501    2  -7   3         2
                69.83          1.54        1.3468   -2  -4   4         2
                70.60          3.59        1.3340    3  -3   4         2
                71.49          2.93        1.3197    5  -4   2         2
                71.63          1.14        1.3174   -2   8   2         2
                71.90          1.38        1.3132    3   0   4         2
                72.26          1.43        1.3075   -5   2   3         2
                72.28          1.64        1.3072   -4  -4   2         2
                72.37          1.74        1.3058    1   7   2         2
                72.68          3.28        1.3009   -1   7   3         2
                72.98          5.61        1.2964   -5   3   3         2
                73.27          1.04        1.2919   -1   9   0         2
                73.63          1.73        1.2865   -1  -7   3         2
                74.04          2.34        1.2803   -2  -7   2         2
                74.63          1.98        1.2718    2  -6   4         2
                74.90          1.34        1.2679   -4  -1   4         2
                75.42          1.49        1.2603   -6   3   1         2
                76.45          2.92        1.2459   -6   4   1         2
                76.64          1.66        1.2433    4   5   0         2
                76.86          1.41        1.2403   -3   9   1         2
                77.76          1.25        1.2282   -3   1   5         2
                78.27          5.27        1.2214    1   5   4         2
                80.64          1.60        1.1914    5   3   1         2
                80.96          1.96        1.1875    4  -4   4         2
                83.21          2.49        1.1610   -1  -7   4         2
                84.60          1.21        1.1455    2  -9   3         2
                86.92          1.10        1.1208    0  10   0         2
                88.52          1.22        1.1046   -1  -2   6         2
                89.21          1.59        1.0978   -2   0   6         2
                89.32          3.85        1.0968    4 -10   1         2
                89.86          1.17        1.0916    0  10   1         2
================================================================================
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.