Natrotitanite
      Stepanov A V, Bekenova G K, Levin V L, Hawthorne F C
      Mineralogical Magazine 76 (2012) 37-44
      Natrotitanite, ideally (Na0.5Y0.5)Ti(SiO4)O, a new mineral from the
      Verkhnee Espe deposit, Akjailyautas mountains, Eastern Kazakhstan district,
      Kazakhstan: description and crystal structure
      Locality: Verkhnee Espe deposit, Kazakhstan
      _database_code_amcsd 0018669

      CELL PARAMETERS:    6.5691   8.6869   7.0924   90.000  114.127   90.000
      SPACE GROUP: C2/c      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    369.372
      Density (g/cm3):      3.887
      MAX. ABS. INTENSITY / VOLUME**2:      20.16048580    
      RIR:      1.689
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                17.98         12.15        4.9342    1   1   0         4
                18.59          4.63        4.7741   -1   1   1         4
                24.68          1.33        3.6067    0   2   1         4
                27.40        100.00        3.2545   -1   1   2         4
                27.56          7.28        3.2364    0   0   2         2
                29.81         77.30        2.9976    2   0   0         2
                31.31         10.15        2.8572   -2   0   2         2
                34.39         70.72        2.6074    1   3   0         4
                34.56         47.00        2.5952    0   2   2         4
                37.68          6.27        2.3871   -2   2   2         4
                38.04          6.14        2.3657    1   1   2         4
                39.49         13.19        2.2821    1   3   1         4
                39.56         15.18        2.2781   -1   1   3         4
                40.38          7.32        2.2337   -1   3   2         4
                41.58          1.34        2.1717    0   4   0         2
                42.83         13.06        2.1114   -3   1   1         4
                43.43          6.54        2.0838    2   2   1         4
                43.67         17.12        2.0729   -3   1   2         4
                43.98         13.35        2.0589    0   4   1         4
                46.64          4.26        1.9475    3   1   0         4
                47.03          1.32        1.9323    0   2   3         4
                48.58          2.77        1.8742    1   3   2         4
                48.95          1.54        1.8606   -3   1   3         4
                49.15          4.33        1.8537    2   0   2         2
                50.40          1.66        1.8106   -2   4   1         4
                50.62         10.05        1.8033    0   4   2         4
                51.63          2.78        1.7703    1   1   3         4
                52.11         14.31        1.7551   -2   0   4         2
                52.96         12.71        1.7290   -2   4   2         4
                53.31          2.22        1.7183   -1   1   4         4
                53.32          4.34        1.7182   -3   3   2         4
                53.77         17.63        1.7049    2   2   2         4
                55.26          2.33        1.6623   -1   5   1         4
                55.90         24.98        1.6447    3   3   0         4
                56.90          5.52        1.6182    0   0   4         2
                59.30          1.35        1.5585   -2   4   3         4
                59.35         13.33        1.5571   -1   5   2         4
                60.35          7.25        1.5338   -4   2   2         4
                61.87         18.73        1.4996   -1   3   4         4
                61.91          5.98        1.4988    4   0   0         2
                64.34          2.85        1.4478    0   6   0         2
                64.98          4.69        1.4351    3   1   2         4
                65.32         11.56        1.4286   -4   0   4         2
                65.82          7.88        1.4189    1   5   2         4
                65.97          8.70        1.4160   -3   3   4         4
                66.29          2.50        1.4099    2   4   2         4
                69.80          9.02        1.3475   -3   5   2         4
                72.20          3.03        1.3084   -4   4   2         4
                72.50          7.26        1.3037    2   6   0         4
                72.88          1.37        1.2979   -5   1   2         4
                74.27          8.52        1.2770    1   3   4         4
                77.67          4.40        1.2293    2   0   4         2
                80.96          1.22        1.1875    4   0   2         2
                84.60          1.98        1.1455    4   2   2         4
                85.50          3.74        1.1357   -5   3   4         4
                87.30          3.36        1.1168   -2   6   4         4
                87.43          1.68        1.1156    3   5   2         4
                88.19          2.79        1.1079    1   7   2         4
                88.20          4.79        1.1078    5   3   0         4
                89.40          1.10        1.0960   -4   4   5         4
================================================================================
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.