Institute of Experimental Mineralogy
                 Russian Academy of Sciences
     -------------------------------------------------
           142432, Chernogolovka, Moscow district
             A.V. Chichagov  +7(496)52-22320

                            ***

          ***      W W W - X R A Y P O L       ***
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SANROMANITE

1

Na(2)CaPb(3)[CO(3)](5)


Hexagonal  P 6(3)mc  Z = 2

P6(3)mc

17 .6 .10

Ref.Str.:

         Schluter J., Malcherek T., Pohl D. (2007)

         * Neues Jb. Mineral., Abh. 183, 117-121

         R: from Santa Rosa mine, near Iquique, Chile.

         N.A.D.

                   Initial data from BDM-file 

   Lattice parameters (cub. angs.,degr.):

             a =  10.5702   alpha =   90.0 
             b =  10.5702   beta  =   90.0 
             c =   6.6509   gamma =  120.0 

    Unit cell volume (cub. angs.) =   643.54

    Molar volume ( cub.cm/mol.) =   193.81

  Co-ordinates, thermal parameters, occupation for atomic positions:

NoP   x/a     y/b     z/c    B(j)   atom  / occupation

   1 0.5232  0.4768  0.3199   0.0    Na    = 0.67, Ca    = 0.33
   2 0.8432  0.1568  0.0      0.0    Pb    = 1.00
   3 0.7944  0.2056  0.5496   0.0    C     = 1.00
   4 0.3333  0.6667  0.495    0.0    C     = 1.00
   5 0.0     0.0     0.846    0.0    C     = 1.00
   6 0.3848  0.0868  0.6406   0.0    O     = 1.00
   7 0.9304  0.0696  0.3502   0.0    O     = 1.00
   8 0.4033  0.5967  0.5071   0.0    O     = 1.00
   9 0.7722  0.2278  0.3734   0.0    O     = 1.00


  Co-ordinates for all atomic positions :

   No       NoP      x/a        y/b       z/c 

     1       1     0.5232     0.4768     0.3199
     2       2     0.8432     0.1568     0.0   
     3       3     0.7944     0.2056     0.5496
     4       4     0.3333     0.6667     0.495 
     5       5     0.0        0.0        0.846 
     6       6     0.3848     0.0868     0.6406
     7       7     0.9304     0.0696     0.3502
     8       8     0.4033     0.5967     0.5071
     9       9     0.7722     0.2278     0.3734
    10       1     0.5232     0.0465     0.3199
    11       1     0.9535     0.4768     0.3199
    12       2     0.8432     0.6863     0.0   
    13       2     0.3137     0.1568     0.0   
    14       3     0.7944     0.5888     0.5496
    15       3     0.4112     0.2056     0.5496
    16       6     0.9132     0.298      0.6406
    17       6     0.702      0.6152     0.6406
    18       7     0.9304     0.8608     0.3502
    19       7     0.1392     0.0696     0.3502
    20       8     0.4033     0.8066     0.5071
    21       8     0.1934     0.5967     0.5071
    22       9     0.7722     0.5444     0.3734
    23       9     0.4556     0.2278     0.3734
    24       1     0.4768     0.5232     0.8199
    25       2     0.1568     0.8432     0.5   
    26       3     0.2056     0.7944     0.0496
    27       4     0.6667     0.3333     0.995 
    28       5     0.0        0.0        0.346 
    29       6     0.6152     0.9132     0.1406
    30       7     0.0696     0.9304     0.8502
    31       8     0.5967     0.4033     0.0071
    32       9     0.2278     0.7722     0.8734
    33       1     0.4768     0.9535     0.8199
    34       1     0.0465     0.5232     0.8199
    35       2     0.1568     0.3137     0.5   
    36       2     0.6863     0.8432     0.5   
    37       3     0.2056     0.4112     0.0496
    38       3     0.5888     0.7944     0.0496
    39       6     0.0868     0.702      0.1406
    40       6     0.298      0.3848     0.1406
    41       7     0.0696     0.1392     0.8502
    42       7     0.8608     0.9304     0.8502
    43       8     0.5967     0.1934     0.0071
    44       8     0.8066     0.4033     0.0071
    45       9     0.2278     0.4556     0.8734
    46       9     0.5444     0.7722     0.8734
    47       6     0.3848     0.298      0.6406
    48       6     0.9132     0.6152     0.6406
    49       6     0.702      0.0868     0.6406
    50       6     0.6152     0.702      0.1406
    51       6     0.0868     0.3848     0.1406
    52       6     0.298      0.9132     0.1406


X-ray density (g/cm cub.)   =      5.2 

MU (1/cm) =     800.247    Mass attenuation coefficient (cm**2/g) =    153.936

 Selected interatomic distances (cation-anion,anion-anion):

 NoP    Atom              Rad.sph.      C.N.    Distance     NoP N.
                           (angs.)               (angs.)

    1   Na   ,Ca             2.88         8
                                                 2.5243       8
                                                 2.7379       6
                                                 2.3836       9
                                                 2.3836       9
                                                 2.4773       8
                                                 2.392        6
                                                 2.7379       6
                                                 2.3919       6
    2    Pb                  3.144       10
                                                 2.8241       7
                                                 2.8028       9
                                                 2.7173       6
                                                 2.666        6
                                                 2.6836       7
                                                 2.6836       7
                                                 2.8189       8
                                                 2.8189       8
                                                 2.7173       6
                                                 2.6659       6
    3    C                   1.872        3
                                                 1.2404       9
                                                 1.2925       6
                                                 1.2924       6
    4    C                   1.872        3
                                                 1.2835       8
                                                 1.2834       8
                                                 1.2834       8
    5    C                   1.872        3
                                                 1.2746       7
                                                 1.2746       7
                                                 1.2746       7
    6    O                   3.264        6
                                                 3.1671       7
                                                 3.1904       8
                                                 2.1964       9
                                                 3.2045       7
                                                 3.1152       8
                                                 2.2324       6
    7    O                   3.264        7
                                                 2.9005       9
                                                 3.1671       6
                                                 2.2072       7
                                                 2.2072       7
                                                 3.2045       6
                                                 3.1671       6
                                                 3.2044       6
    8    O                   3.264        8
                                                 3.1904       6
                                                 2.2186       8
                                                 2.2186       8
                                                 3.1152       6
                                                 2.9722       9
                                                 2.9722       9
                                                 3.1903       6
                                                 3.1152       6
    9    O                   3.264        5
                                                 2.9005       7
                                                 2.1964       6
                                                 2.9723       8
                                                 2.9723       8
                                                 2.1963       6

  X-ray diffraction powder data (II),  X-Ray W.L. =   1.54056(angs.):

  No   H   K   L   Theta 2*Theta    S       LPG   MF        F          I int.
                    ( degree )                                         *100

    1   1   0   0  4.827   9.654   0.055  279.48    6       84.6     2897.8
    2   1   0   1  8.231  16.461   0.093   94.65   12       96.2     2536.9
    3   1   1   0  8.38   16.761   0.095   91.21    6      133.1     2341.3
    4   2   0   0  9.689  19.377   0.109   67.69    6      160.3     2519.4
    5   2   0   1 11.788  23.576   0.133   45.04   12      281.6    10351.9
    6   2   1   0 12.864  25.727   0.145   37.49   12       41.2      184.2
    7   0   0   2 13.393  26.786   0.15    34.43    2      409.0     2780.6
    8   1   0   2 14.267  28.534   0.16    30.1    12       80.3      562.2
    9   2   1   1 14.534  29.068   0.163   28.94   24      169.7     4830.1
   10   3   0   0 14.622  29.244   0.164   28.56    6      156.7     1016.1
   11   1   1   2 15.883  31.765   0.178   23.92   12      106.0      778.9
   12   3   0   1 16.125  32.251   0.18    23.15   12      140.2     1318.2
   13   2   0   2 16.637  33.275   0.186   21.63   12      257.8     4166.8
   14   2   2   0 16.947  33.895   0.189   20.78    6      413.0     5136.2
   15   3   1   0 17.662  35.323   0.197   18.99   12       67.0      246.9
   16   2   1   2 18.74   37.48    0.209   16.67   24       16.9       27.5
   17   3   1   1 18.95   37.901   0.211   16.27   24       97.1      889.3
   18   4   0   0 19.669  39.338   0.218   14.98    6      163.9      582.8
   19   3   0   2 20.036  40.071   0.222   14.38   12      136.3      773.5
   20   4   0   1 20.852  41.704   0.231   13.15   12      352.9     4747.4
   21   1   0   3 20.946  41.892   0.232   13.02   12      153.6      890.1
   22   3   2   0 21.517  43.035   0.238   12.26   12      116.3      480.3
   23   2   2   2 21.859  43.717   0.242   11.83   12      332.7     3794.1
   24   3   1   2 22.44   44.879   0.248   11.15   24       95.1      585.0
   25   3   2   1 22.621  45.242   0.25    10.95   24       64.6      265.1
   26   4   1   0 22.681  45.363   0.25    10.89   12      129.0      525.3
   27   2   0   3 22.71   45.419   0.251   10.86   12      322.0     3262.4
   28   4   1   1 23.742  47.485   0.261    9.82   24       76.8      335.3
   29   4   0   2 24.116  48.232   0.265    9.47   12      213.0     1245.1
   30   2   1   3 24.372  48.743   0.268    9.25   24      110.4      653.9
   31   5   0   0 24.881  49.762   0.273    8.83    6       58.9       44.3
   32   3   0   3 25.434  50.868   0.279    8.39   12      122.9      367.6
   33   3   2   2 25.709  51.418   0.282    8.19   24      161.7     1241.5
   34   5   0   1 25.873  51.746   0.283    8.07   12      233.3     1272.7
   35   3   3   0 25.928  51.855   0.284    8.04    6       41.8       20.4
   36   4   2   0 26.44   52.88    0.289    7.68   12       99.4      220.0
   37   4   1   2 26.733  53.465   0.292    7.49   24      104.7      476.3
   38   4   2   1 27.392  54.784   0.299    7.09   24      269.7     2987.8
   39   3   1   3 27.469  54.938   0.299    7.05   24       83.4      283.7
   40   0   0   4 27.598  55.196   0.301    6.97    2      280.4      264.7
   41   5   1   0 27.937  55.875   0.304    6.78   12        7.7        1.2
   42   1   0   4 28.089  56.178   0.306    6.7    12       59.7       69.1
   43   5   0   2 28.704  57.407   0.312    6.38   12       10.6        2.1
   44   5   1   1 28.856  57.712   0.313    6.3    24       99.0      357.6
   45   4   0   3 28.93   57.861   0.314    6.26   12      242.3     1065.3
   46   1   1   4 29.055  58.11    0.315    6.2    12       87.8      138.4
   47   2   0   4 29.53   59.061   0.32     5.98   12      182.6      577.9
   48   3   3   2 29.657  59.313   0.321    5.92   12       79.4      108.2
   49   4   2   2 30.126  60.252   0.326    5.72   24      160.0      848.8
   50   6   0   0 30.323  60.646   0.328    5.64    6      263.6      567.3
   51   3   2   3 30.346  60.692   0.328    5.63   24       61.5      123.2
   52   4   3   0 30.787  61.573   0.332    5.45   12       87.3      120.4
   53   2   1   4 30.929  61.859   0.334    5.39   24       20.5       13.1
   54   6   0   1 31.198  62.395   0.336    5.29   12       37.5       21.5
   55   4   1   3 31.269  62.537   0.337    5.27   24       65.1      129.2
   56   5   1   2 31.509  63.019   0.339    5.18   24       29.9       26.8
   57   4   3   1 31.654  63.307   0.341    5.13   24      153.4      699.2
   58   5   2   0 31.701  63.403   0.341    5.11   12      130.2      251.1
   59   3   0   4 31.842  63.684   0.342    5.06   12      120.2      211.9
   60   5   2   1 32.555  65.109   0.349    4.82   24      138.4      535.5
   61   5   0   3 33.069  66.138   0.354    4.66   12      101.0      137.9
   62   2   2   4 33.185  66.369   0.355    4.63   12      312.2     1307.4
   63   6   1   0 33.489  66.979   0.358    4.54   12      138.1      250.8
   64   3   1   4 33.626  67.252   0.359    4.5    24       89.8      210.5
   65   6   0   2 33.744  67.487   0.361    4.47   12      261.5      885.8
   66   4   3   2 34.181  68.363   0.365    4.35   24       48.8       60.0
   67   6   1   1 34.32   68.639   0.366    4.31   24       28.4       20.1
   68   4   2   3 34.387  68.774   0.367    4.3    24      237.6     1405.8
   69   4   0   4 34.934  69.867   0.372    4.16   12      163.7      322.9
   70   5   2   2 35.049  70.098   0.373    4.13   24      101.9      248.7
   71   4   4   0 35.661  71.321   0.378    3.99    6      316.1      578.0
   72   5   1   3 35.682  71.363   0.379    3.99   24       72.6      121.9
   73   1   0   5 35.814  71.629   0.38     3.96   12       97.1      108.1
   74   5   3   0 36.088  72.176   0.382    3.9    12       50.0       28.3
   75   7   0   0 36.088  72.176   0.382    3.9     6      160.8      146.1
   76   3   2   4 36.22   72.44    0.384    3.87   24      144.6      469.4
   77   6   1   2 36.758  73.515   0.388    3.77   24      123.8      334.4
   78   5   3   1 36.892  73.783   0.39     3.74   24       53.3       61.6
   79   7   0   1 36.892  73.783   0.39     3.74   12       16.3        2.9
   80   4   1   4 37.067  74.134   0.391    3.71   24       93.7      188.6
   81   2   0   5 37.088  74.176   0.391    3.7    12      258.0      714.0
   82   6   2   0 37.358  74.715   0.394    3.65   12      111.5      131.7
   83   6   0   3 37.798  75.596   0.398    3.58   12       24.3        6.1
   84   6   2   1 38.151  76.303   0.401    3.52   24      197.5      795.8
   85   4   3   3 38.216  76.432   0.402    3.51   24      139.0      392.7
   86   2   1   5 38.345  76.691   0.403    3.49   24      120.9      295.6
   87   5   0   4 38.741  77.482   0.406    3.43   12       16.3        2.7
   88   4   4   2 38.852  77.704   0.407    3.41   12      245.6      596.3
   89   5   2   3 39.048  78.096   0.409    3.38   24      196.0      753.4
   90   3   0   5 39.176  78.353   0.41     3.36   12       51.1       25.5
   91   5   3   2 39.267  78.533   0.411    3.35   24       37.5       27.4
   92   7   0   2 39.267  78.533   0.411    3.35   12      206.2      413.0
   93   7   1   0 39.442  78.883   0.412    3.33   12       23.8        5.5
   94   3   3   4 39.57   79.139   0.413    3.31   12       79.6       60.8
   95   4   2   4 39.982  79.964   0.417    3.26   24      141.3      376.7
   96   7   1   1 40.223  80.445   0.419    3.23   24       70.8       93.7
   97   6   2   2 40.504  81.007   0.422    3.19   24      128.3      304.5
   98   6   1   3 40.697  81.395   0.423    3.17   24       32.8       19.8
   99   3   1   5 40.824  81.649   0.424    3.16   24       61.9       70.1
  100   5   4   0 41.087  82.174   0.427    3.13   12      203.3      374.6
  101   5   1   4 41.214  82.428   0.428    3.12   24       17.7        5.7
  102   5   4   1 41.861  83.723   0.433    3.05   24       27.0       12.9
  103   6   3   0 41.904  83.809   0.434    3.05   12       82.2       59.6
  104   4   0   5 42.051  84.102   0.435    3.03   12      234.9      485.1
  105   8   0   0 42.312  84.624   0.437    3.01    6      114.1       56.8
  106   7   1   2 42.547  85.095   0.439    2.99   24       55.0       52.4
  107   6   3   1 42.676  85.353   0.44     2.98   24       94.8      155.2
  108   8   0   1 43.083  86.166   0.443    2.95   12      230.0      451.6
  109   5   3   3 43.146  86.293   0.444    2.94   24       48.2       39.6
  110   7   0   3 43.146  86.293   0.444    2.94   12       54.8       25.6
  111   6   0   4 43.252  86.504   0.445    2.94   12      261.9      583.2
  112   3   2   5 43.272  86.545   0.445    2.93   24       49.4       41.5
  113   7   2   0 43.533  87.065   0.447    2.92   12       99.4       83.5
  114   4   3   4 43.659  87.317   0.448    2.91   24       39.8       26.7
  115   0   0   6 44.019  88.038   0.451    2.88    2      366.1      186.6
  116   4   1   5 44.085  88.169   0.452    2.88   24       41.6       28.8
  117   5   4   2 44.173  88.346   0.452    2.87   24      166.5      461.8
  118   7   2   1 44.302  88.603   0.453    2.87   24      197.4      647.3
  119   6   2   3 44.365  88.729   0.454    2.86   24      198.7      655.2
  120   1   0   6 44.425  88.849   0.454    2.86   12       60.9       30.7
  121   5   2   4 44.47   88.941   0.455    2.86   24      104.2      179.9
  122   6   3   2 44.985  89.969   0.459    2.83   24       67.3       74.3


  X-ray diffraction powder data (I)...X-Ray wave length =  1.54056 (angs.):

  No   H   K   L   Theta 2*Theta    d           I int   I int.n.  I p.h.n.   H(Si)
                    ( degree )   (angstrem)     *100                         *100

    1   1   0   0   4.827   9.654  9.15406     2897.8     28.0     28.2     5.6
    2   1   0   1   8.231  16.461  5.38067     2536.9     24.5     24.6     5.6
    3   1   1   0   8.38   16.761  5.2851      2341.3     22.6     22.7     5.6
    4   2   0   0   9.689  19.377  4.57703     2519.4     24.3     24.4     5.6
    5   2   0   1  11.788  23.576  3.77046    10351.9    100.0    100.0     5.6
    6   2   1   0  12.864  25.727  3.45991      184.2      1.8      1.8     5.6
    7   0   0   2  13.393  26.786  3.32545     2780.6     26.9     26.8     5.6
    8   1   0   2  14.267  28.534  3.1256       562.2      5.4      5.4     5.6
    9   2   1   1  14.534  29.068  3.06942     4830.1     46.7     46.5     5.6
   10   3   0   0  14.622  29.244  3.05135     1016.1      9.8      9.8     5.6
   11   1   1   2  15.883  31.765  2.81463      778.9      7.5      7.5     5.6
   12   3   0   1  16.125  32.251  2.7734      1318.2     12.7     12.6     5.6
   13   2   0   2  16.637  33.275  2.69033     4166.8     40.3     39.9     5.6
   14   2   2   0  16.947  33.895  2.64255     5136.2     49.6     49.2     5.7
   15   3   1   0  17.662  35.323  2.53888      246.9      2.4      2.4     5.7
   16   3   1   1  18.95   37.901  2.37193      889.3      8.6      8.5     5.7
   17   4   0   0  19.669  39.338  2.28852      582.8      5.6      5.6     5.7
   18   3   0   2  20.036  40.071  2.2483       773.5      7.5      7.4     5.7
   19   4   0   1  20.852  41.704  2.16399     4747.4     45.9     45.1     5.7
   20   1   0   3  20.946  41.892  2.15468      890.1      8.6      8.5     5.7
   21   3   2   0  21.517  43.035  2.10009      480.3      4.6      4.6     5.7
   22   2   2   2  21.859  43.717  2.06888     3794.1     36.7     36.0     5.7
   23   3   1   2  22.44   44.879  2.01798      585.0      5.7      5.5     5.7
   24   3   2   1  22.621  45.242  2.00262      265.1      2.6      2.5     5.7
   25   2   0   3  22.71   45.419  1.99523     3787.6     36.6     35.9     5.7
   26   4   1   1  23.742  47.485  1.91315      335.3      3.2      3.2     5.7
   27   4   0   2  24.116  48.232  1.88523     1245.1     12.0     11.8     5.7
   28   2   1   3  24.372  48.743  1.86664      653.9      6.3      6.2     5.7
   29   3   0   3  25.434  50.868  1.79356      367.6      3.6      3.5     5.8
   30   3   2   2  25.709  51.418  1.77565     1241.5     12.0     11.7     5.8
   31   5   0   1  25.873  51.746  1.76516     1272.7     12.3     12.0     5.8
   32   4   2   0  26.44   52.88   1.72995      220.0      2.1      2.1     5.8
   33   4   1   2  26.733  53.465  1.71239      476.3      4.6      4.5     5.8
   34   4   2   1  27.392  54.784  1.67425     2987.8     28.9     28.0     5.8
   35   3   1   3  27.469  54.938  1.66992      283.7      2.7      2.7     5.8
   36   0   0   4  27.598  55.196  1.66273      264.7      2.6      2.5     5.8
   37   5   1   1  28.856  57.712  1.59607      357.6      3.5      3.3     5.8
   38   4   0   3  28.93   57.861  1.59233     1065.3     10.3      9.9     5.8
   39   1   1   4  29.055  58.11   1.58608      138.4      1.3      1.3     5.8
   40   2   0   4  29.53   59.061  1.5628       577.9      5.6      5.4     5.8
   41   3   3   2  29.657  59.313  1.55674      108.2      1.0      1.0     5.8
   42   4   2   2  30.126  60.252  1.53471      848.8      8.2      7.9     5.8
   43   6   0   0  30.323  60.646  1.52568      690.5      6.7      6.4     5.8
   44   4   3   0  30.787  61.573  1.50492      120.4      1.2      1.1     5.8
   45   4   1   3  31.269  62.537  1.48402      129.2      1.2      1.2     5.8
   46   4   3   1  31.654  63.307  1.46781      699.2      6.8      6.5     5.9
   47   5   2   0  31.701  63.403  1.46582      251.1      2.4      2.3     5.9
   48   3   0   4  31.842  63.684  1.46003      211.9      2.0      2.0     5.9
   49   5   2   1  32.555  65.109  1.43147      535.5      5.2      4.9     5.9
   50   5   0   3  33.069  66.138  1.41167      137.9      1.3      1.3     5.9
   51   2   2   4  33.185  66.369  1.40732     1307.4     12.6     12.0     5.9
   52   6   1   0  33.489  66.979  1.39598      250.8      2.4      2.3     5.9
   53   3   1   4  33.626  67.252  1.39098      210.5      2.0      1.9     5.9
   54   6   0   2  33.744  67.487  1.3867       885.8      8.6      8.1     5.9
   55   4   2   3  34.387  68.774  1.36386     1405.8     13.6     12.9     5.9
   56   4   0   4  34.934  69.867  1.34517      322.9      3.1      3.0     5.9
   57   5   2   2  35.049  70.098  1.3413       248.7      2.4      2.3     5.9
   58   4   4   0  35.661  71.321  1.32127      699.9      6.8      6.4     5.9
   59   1   0   5  35.814  71.629  1.31636      108.1      1.0      1.0     5.9
   60   7   0   0  36.088  72.176  1.30772      174.4      1.7      1.6     5.9
   61   3   2   4  36.22   72.44   1.30361      469.4      4.5      4.3     5.9
   62   6   1   2  36.758  73.515  1.28717      334.4      3.2      3.0     6.0
   63   2   0   5  37.088  74.176  1.27733      902.7      8.7      8.2     6.0
   64   6   2   0  37.358  74.715  1.26944      131.7      1.3      1.2     6.0
   65   6   2   1  38.151  76.303  1.24693      795.8      7.7      7.2     6.0
   66   4   3   3  38.216  76.432  1.24514      392.7      3.8      3.5     6.0
   67   2   1   5  38.345  76.691  1.24158      295.6      2.9      2.7     6.0
   68   4   4   2  38.852  77.704  1.2279       596.3      5.8      5.4     6.0
   69   5   2   3  39.048  78.096  1.22272      753.4      7.3      6.8     6.0
   70   7   0   2  39.267  78.533  1.217        440.3      4.3      4.0     6.0
   71   4   2   4  39.982  79.964  1.19879      376.7      3.6      3.4     6.0
   72   6   2   2  40.504  81.007  1.18597      304.5      2.9      2.7     6.1
   73   5   4   0  41.087  82.174  1.17206      374.6      3.6      3.3     6.1
   74   4   0   5  42.051  84.102  1.15003      485.1      4.7      4.3     6.1
   75   6   3   1  42.676  85.353  1.13635      155.2      1.5      1.4     6.1
   76   8   0   1  43.083  86.166  1.12769      451.6      4.4      4.0     6.1
   77   6   0   4  43.252  86.504  1.12415      624.7      6.0      5.5     6.1
   78   0   0   6  44.019  88.038  1.10848      186.6      1.8      1.6     6.2
   79   5   4   2  44.173  88.346  1.10541      461.8      4.5      4.1     6.2
   80   7   2   1  44.302  88.603  1.10286      647.3      6.3      5.7     6.2
   81   6   2   3  44.365  88.729  1.10163      655.2      6.3      5.7     6.2
   82   5   2   4  44.47   88.941  1.09955      179.9      1.7      1.6     6.2

Reference:
Chichagov A.V. et al.
Information-Calculating System on Crystal Structure Data of Minerals
(MINCRYST)
- Kristallographiya, v.35, n.3, 1990, p.610-616 (in Russian)