Armstrongite
      Mesto E, Kaneva E, Schingaro E, Vladykin N, Lacalamita M, Scordari F
      American Mineralogist 99 (2014) 2424-2432
      Armstrongite from Khan Bogdo (Mongolia): Crystal structure determination and
      implications for zeolite-like cation exchange properties
      Locality: Khan Bogdo deposit, southern Gobi Desert, Gobi, Mongolia
      _database_code_amcsd 0020417

      CELL PARAMETERS:   14.0178  14.1289   7.8366   90.000  109.436   90.000
      SPACE GROUP: C2/m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:   1463.639
      Density (g/cm3):      2.616
      MAX. ABS. INTENSITY / VOLUME**2:      10.66413008    
      RIR:      1.328
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                 9.16          2.43        9.6529    1   1   0         4
                11.98         21.70        7.3900    0   0   1         2
                12.53         47.95        7.0644    0   2   0         2
                13.40         83.56        6.6095    2   0   0         2
                17.37          3.31        5.1065    0   2   1         4
                18.38          6.00        4.8264    2   2   0         4
                19.37         35.40        4.5828   -2   2   1         4
                20.80         89.93        4.2707    2   0   1         2
                22.19          2.57        4.0062   -1   3   1         4
                23.35         70.88        3.8101   -2   0   2         2
                24.09          8.54        3.6950    0   0   2         2
                24.35          9.51        3.6548    2   2   1         4
                25.21          2.13        3.5322    0   4   0         2
                25.61          1.47        3.4789   -4   0   1         2
                26.57          4.46        3.3542   -3   1   2         4
                26.58         14.06        3.3535   -2   2   2         4
                26.98         19.51        3.3047    4   0   0         2
                27.24          3.06        3.2742    0   2   2         4
                27.53          6.96        3.2400    3   1   1         4
                27.87          3.40        3.2009    1   1   2         4
                28.00         25.77        3.1869    0   4   1         4
                28.60          5.17        3.1210   -4   2   1         4
                28.66          4.52        3.1153    2   4   0         4
                29.31        100.00        3.0468   -2   4   1         4
                29.67         14.65        3.0109   -4   0   2         2
                29.69          2.75        3.0093   -1   3   2         4
                29.85         21.71        2.9934    4   2   0         4
                31.42          2.22        2.8469    2   0   2         2
                33.17         13.55        2.7005    4   0   1         2
                33.83          1.81        2.6495   -1   5   1         4
                33.95          7.98        2.6405    2   2   2         4
                34.36          7.35        2.6099   -2   0   3         2
                34.63         17.31        2.5903   -2   4   2         4
                35.15         10.28        2.5533    0   4   2         4
                35.59          2.03        2.5225    4   2   1         4
                36.24          8.59        2.4786   -4   4   1         4
                36.48          6.81        2.4633    0   0   3         2
                37.26          7.93        2.4132    4   4   0         4
                37.58          1.56        2.3931   -4   0   3         2
                37.58          2.32        2.3931   -3   5   1         4
                38.56          1.02        2.3347   -6   0   1         2
                39.32          1.78        2.2914   -4   4   2         4
                39.77          1.74        2.2666   -4   2   3         4
                40.07          5.69        2.2501   -6   0   2         2
                40.34          4.75        2.2357   -3   3   3         4
                40.38          3.47        2.2335    5   1   1         4
                40.71          9.19        2.2166    2   4   2         4
                40.96          1.39        2.2032    6   0   0         2
                41.16          3.33        2.1931   -2   6   1         4
                41.28          1.24        2.1868   -3   5   2         4
                42.18          1.25        2.1426    1   5   2         4
                42.33          5.49        2.1354    4   0   2         2
                43.09          3.03        2.0990   -2   4   3         4
                43.99          2.57        2.0583    1   3   3         4
                44.86          2.98        2.0205    0   4   3         4
                45.69          1.21        1.9858    0   6   2         4
                45.80         17.30        1.9812   -4   4   3         4
                46.63         14.30        1.9477   -6   4   1         4
                46.78         10.01        1.9418    6   0   1         2
                47.06          1.04        1.9308   -6   2   3         4
                47.41          1.36        1.9178    4   6   0         4
                47.81          1.11        1.9024    1   7   1         4
                47.94          1.69        1.8978   -6   4   2         4
                48.63          3.55        1.8724    6   2   1         4
                48.71          2.90        1.8693    6   4   0         4
                49.01          1.17        1.8587    5   1   2         4
                49.14          2.08        1.8542    3   5   2         4
                49.33          2.64        1.8475    0   0   4         2
                49.56          6.97        1.8394   -4   2   4         4
                49.91          1.87        1.8274    4   4   2         4
                50.64          1.35        1.8024   -3   3   4         4
                50.72          3.59        1.7998    2   4   3         4
                51.10          1.37        1.7874    0   2   4         4
                51.76         12.65        1.7661    0   8   0         2
                51.94          1.11        1.7604    3   3   3         4
                52.33          1.02        1.7483   -2   6   3         4
                52.43          3.57        1.7452   -6   4   3         4
                52.58          2.74        1.7406   -8   0   1         2
                52.62          2.10        1.7395   -8   0   2         2
                52.65          1.45        1.7384   -5   5   3         4
                52.65          2.86        1.7383    1   1   4         4
                53.27          1.03        1.7198    4   0   3         2
                53.55          2.93        1.7112   -2   4   4         4
                53.72          4.70        1.7062    2   8   0         4
                53.86          2.59        1.7022    0   6   3         4
                53.88          2.31        1.7016    6   4   1         4
                54.68          4.70        1.6785   -4   6   3         4
                54.74          5.65        1.6767   -4   4   4         4
                54.95          3.58        1.6710    4   2   3         4
                55.19          2.91        1.6643    6   0   2         2
                55.42          2.20        1.6580   -6   6   1         4
                55.96          1.72        1.6432    2   0   4         2
                56.19          1.92        1.6371    0   4   4         4
                56.37          5.83        1.6321    2   8   1         4
                56.57          3.57        1.6268   -6   6   2         4
                57.26          2.45        1.6089    8   2   0         4
                57.26          1.44        1.6088    6   6   0         4
                57.36          1.19        1.6063   -8   2   3         4
                57.52          4.50        1.6023   -2   8   2         4
                58.59          1.18        1.5755    3   5   3         4
                59.18          1.92        1.5613   -8   4   1         4
                59.33          2.80        1.5576    4   8   0         4
                59.61          1.07        1.5511   -6   4   4         4
                59.81          4.30        1.5462    4   4   3         4
                60.80          3.22        1.5234   -4   8   2         4
                60.93          2.39        1.5204   -2   2   5         4
                61.61          2.07        1.5055   -8   0   4         2
                62.01          7.15        1.4967    8   4   0         4
                62.11          7.41        1.4945   -8   4   3         4
                62.59          1.68        1.4841    7   1   2         4
                62.87          4.13        1.4781    4   8   1         4
                63.00          3.72        1.4754   -6   0   5         2
                63.61          1.35        1.4627   -2   8   3         4
                64.15          1.35        1.4517   -1   3   5         4
                64.53          1.45        1.4442   -6   2   5         4
                64.97          3.31        1.4353    0   8   3         4
                65.52          2.04        1.4247   -2   4   5         4
                65.71          1.63        1.4210   -4   8   3         4
                66.37          1.29        1.4085   -6   8   1         4
                67.41          3.87        1.3893   -6   8   2         4
                67.73          1.06        1.3835  -10   0   1         2
                68.17          1.22        1.3755   -2  10   1         4
                69.01          1.06        1.3609    4   8   2         4
                69.11          1.21        1.3591    6   6   2         4
                71.10          2.03        1.3259    2   2   5         4
                72.16          1.02        1.3091   -4  10   1         4
                72.32          2.12        1.3065    6   8   1         4
                72.58          4.20        1.3025  -10   4   2         4
                72.80          2.14        1.2991    4  10   0         4
                72.82          2.52        1.2989  -10   0   4         2
                72.84          1.31        1.2985   -3   1   6         4
                74.24          1.70        1.2774  -10   4   3         4
                75.05          1.77        1.2656    2  10   2         4
                75.38          1.92        1.2609    2   4   5         4
                75.39          1.39        1.2608   -1   1   6         4
                76.14          1.87        1.2502   -6   6   5         4
                76.90          1.22        1.2397   -8   8   1         4
                77.86          1.08        1.2268    9   1   2         4
                78.89          1.02        1.2134    0   2   6         4
                79.06          1.80        1.2112    6   8   2         4
                81.61          1.08        1.1798   -8   2   6         4
                83.01          1.92        1.1634   10   4   1         4
                83.33          1.04        1.1596  -12   0   3         2
                83.70          1.07        1.1555   -2  12   1         4
                84.58          1.67        1.1457   -8   8   4         4
                85.58          1.63        1.1348   -4  10   4         4
                85.82          2.22        1.1323   -6   8   5         4
                86.51          1.28        1.1251  -12   0   4         2
                87.46          1.13        1.1153   -4  12   1         4
                88.07          1.01        1.1091    4  12   0         4
================================================================================
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.