Proshchenkoite-(Y)
      Raade G, Grice J D, Erambert M, Kristiansson P, Witzke T
      Mineralogical Magazine 72 (2008) 1071-1082
      Proshchenkoite-(Y) from Russia - a new mineral species in the vicanite group:
      Descriptive data and crystal structure
      Locality: Tommot REE-Nb deposit in Yakutia, Russia
      _database_code_amcsd 0018903

      CELL PARAMETERS:   10.7527  10.7527  27.4002   90.000   90.000  120.000
      SPACE GROUP: R3m       
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:   2743.591
      Density (g/cm3):      4.926
      MAX. ABS. INTENSITY / VOLUME**2:      32.59505466    
      RIR:      2.154
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                 9.68          2.78        9.1334    0   0   3         1
                11.49         17.43        7.7015    0   1   2         3
                16.06          5.84        5.5179    1   0   4         3
                16.49          8.56        5.3763    1   1   0         6
                18.79         12.57        4.7229    0   1   5         3
                19.16          1.57        4.6332    1   1   3         6
                19.34          9.99        4.5903    0   2   1         3
                19.44          1.52        4.5667    0   0   6         1
                20.14         43.38        4.4084    2   0   2         3
                23.10          2.38        3.8507    0   2   4         3
                24.67         13.83        3.6085    1   0   7         3
                25.10          4.54        3.5483    2   0   5         3
                25.52          5.64        3.4910    2   1   1         6
                25.59          3.94        3.4806    1   1   6         6
                26.14         14.67        3.4089    1   2   2         6
                27.75          4.33        3.2145    0   1   8         3
                28.51         46.77        3.1306    2   1   4         6
                28.76         25.27        3.1040    3   0   0         3
                29.34         17.40        3.0445    0   0   9         1
                29.82        100.00        2.9962    0   2   7         3
                30.18         68.21        2.9614    1   2   5         6
                30.41         29.06        2.9389    0   3   3         3
                30.41         33.30        2.9389    3   0   3         3
                32.45         16.35        2.7590    2   0   8         3
                33.33         40.48        2.6882    2   2   0         6
                34.11          5.41        2.6286    1   0  10         3
                34.26         14.51        2.6172    2   1   7         6
                34.79          3.59        2.5788    2   2   3         6
                34.89          1.15        2.5713    1   3   1         6
                34.95          1.68        2.5672    0   3   6         3
                34.95          1.45        2.5672    3   0   6         3
                35.37          8.78        2.5380    3   1   2         6
                37.21          2.12        2.4167    1   3   4         6
                37.37          3.33        2.4063    0   1  11         3
                38.11          2.95        2.3615    0   2  10         3
                38.54          4.33        2.3363    3   1   5         6
                39.25          4.11        2.2951    0   4   2         3
                40.94          1.87        2.2042    4   0   4         3
                41.55          2.28        2.1735    0   3   9         3
                41.55         15.53        2.1735    3   0   9         3
                41.78          8.53        2.1621    2   1  10         6
                41.91         13.82        2.1557    1   3   7         6
                42.17          6.91        2.1427    0   4   5         3
                42.84         10.10        2.1108    2   3   2         6
                44.05          4.70        2.0557    1   0  13         3
                44.42         15.87        2.0395    3   2   4         6
                44.56          1.32        2.0332    1   2  11         6
                44.99         18.96        2.0151    2   2   9         6
                45.32          5.00        2.0009    4   0   7         3
                45.57         23.60        1.9904    2   3   5         6
                45.74          9.32        1.9836    1   4   3         6
                45.74          7.03        1.9836    4   1   3         6
                47.21          1.53        1.9254    0   4   8         3
                47.34          5.92        1.9201    0   2  13         3
                47.47          2.21        1.9153    0   1  14         3
                48.55          9.68        1.8752    3   2   7         6
                49.02          4.00        1.8581    0   5   1         3
                49.38          3.44        1.8454    5   0   2         3
                49.56         13.68        1.8393    0   3  12         3
                49.56         28.91        1.8393    3   0  12         3
                49.93          2.85        1.8267    0   0  15         1
                50.34          8.83        1.8126    2   3   8         6
                50.47          1.10        1.8083    2   1  13         6
                50.59         11.07        1.8042    2   0  14         3
                50.80         15.04        1.7972    0   5   4         3
                50.93          1.73        1.7929    3   1  11         6
                50.96         20.50        1.7921    3   3   0         6
                51.51          1.26        1.7741    4   0  10         3
                51.85         17.58        1.7634    5   0   5         3
                52.00          1.20        1.7586    3   3   3         6
                52.94          1.55        1.7296    1   1  15         6
                53.58          2.79        1.7105    1   2  14         6
                53.78          1.95        1.7045    2   4   4         6
                53.91          1.27        1.7008    0   4  11         3
                54.46          9.12        1.6848    3   2  10         6
                54.48          1.32        1.6843    1   0  16         3
                54.57          2.97        1.6818    0   5   7         3
                54.79          5.77        1.6755    4   2   5         6
                55.34          5.20        1.6602    1   5   2         6
                56.77          2.16        1.6216    2   3  11         6
                57.33          6.00        1.6072    0   2  16         3
                57.41          1.04        1.6051    2   4   7         6
                57.62          2.34        1.5997    1   5   5         6
                58.08          1.07        1.5882    0   1  17         3
                58.64          3.94        1.5743    0   3  15         3
                59.89         10.91        1.5444    3   3   9         6
                60.07          3.19        1.5403    0   5  10         3
                60.08          1.27        1.5399    2   1  16         6
                60.17          5.86        1.5380    5   1   7         6
                60.51          2.53        1.5301    0   6   3         3
                60.51          1.24        1.5301    6   0   3         3
                60.58          1.29        1.5285    4   3   1         6
                60.82          4.52        1.5231    2   0  17         3
                60.89          1.31        1.5214    3   4   2         6
                61.04          4.03        1.5180    1   4  12         6
                61.04          1.59        1.5180    4   1  12         6
                61.36          1.99        1.5109    2   2  15         6
                61.72          2.36        1.5029    1   5   8         6
                61.84          3.21        1.5004    3   2  13         6
                61.94          1.02        1.4981    0   4  14         3
                62.13          2.49        1.4940    4   3   4         6
                62.26          2.99        1.4911    5   2   0         6
                62.75          1.71        1.4807    2   4  10         6
                63.05          3.13        1.4744    3   4   5         6
                63.18          4.02        1.4716    2   5   3         6
                63.18          6.34        1.4716    5   2   3         6
                64.58          3.99        1.4431    2   3  14         6
                65.50          2.07        1.4251    1   0  19         3
                68.22          1.05        1.3747    6   1   5         6
                69.70          1.90        1.3492    5   0  14         3
                70.30          1.11        1.3391    5   2   9         6
                70.46          1.48        1.3364    4   3  10         6
                70.47          1.72        1.3362    3   2  16         6
                70.58          1.49        1.3344    2   1  19         6
                71.15          1.66        1.3252    0   4  17         3
                71.22          1.53        1.3241    0   7   2         3
                71.22          4.36        1.3241    5   3   2         6
                73.62          4.10        1.2867    2   3  17         6
                73.69          2.73        1.2857    2   6   2         6
                73.83          1.61        1.2836    0   6  12         3
                73.83          2.37        1.2836    6   0  12         3
                74.65          1.42        1.2715    1   5  14         6
                74.82          2.76        1.2690    6   2   4         6
                75.48          6.58        1.2595    3   5   7         6
                75.48          1.39        1.2595    7   0   7         3
                75.66          1.57        1.2569    2   6   5         6
                76.26          2.88        1.2485    2   5  12         6
                76.26          6.35        1.2485    5   2  12         6
                76.88          2.60        1.2400    5   3   8         6
                76.88          1.50        1.2400    0   7   8         3
                77.37          3.67        1.2334    7   1   0         6
                79.48          1.17        1.2058    3   4  14         6
                79.69          1.77        1.2032    0   2  22         3
                79.72          2.33        1.2028    0   3  21         3
                80.21          1.14        1.1967    3   5  10         6
                80.23          2.39        1.1965    5   1  16         6
                80.33          6.59        1.1953    3   2  19         6
                82.14          1.04        1.1734    0   7  11         3
                83.25          1.34        1.1606    1   5  17         6
                83.73          1.95        1.1551    2   5  15         6
                84.41          1.05        1.1476    0   8   4         3
                84.81          1.88        1.1432    7   1   9         6
                84.81          1.98        1.1432    1   7   9         6
                84.95          1.09        1.1417    0   0  24         1
                85.08          1.93        1.1402    0   5  19         3
                85.23          1.67        1.1386    8   0   5         3
                88.62          1.17        1.1036    5   0  20         3
                88.97          1.90        1.1002    5   3  14         6
================================================================================
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.