Calciolangbeinite
      Pekov I V, Zelenski M E, Zubkova N V, Yapaskurt V O, Chukanov N V,
      Belakovskiy D I, Pushcharovsky D Y
      Mineralogical Magazine 76 (2012) 673-682
      Calciolangbeinite, K2Ca2(SO4)3, a new mineral from the Tolbachik volcano,
      Kamchatka, Russia
      Locality: Tolbachik volcano, Kamchatka, Russia
      _database_code_amcsd 0018991

      CELL PARAMETERS:   10.1900  10.1900  10.1900   90.000   90.000   90.000
      SPACE GROUP: P2_13     
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:   1058.090
      Density (g/cm3):      2.735
      MAX. ABS. INTENSITY / VOLUME**2:      25.30094763    
      RIR:      3.012
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                15.06          3.55        5.8832    1   1   1         4
                19.48          1.03        4.5571    2   0   1        12
                21.36         17.49        4.1600    2   1   1        12
                26.24          2.12        3.3967    2   2   1        12
                27.68         50.14        3.2224    3   0   1        12
                27.68         49.86        3.2224    3   1   0        12
                29.06          7.82        3.0724    3   1   1        12
                31.66          6.42        2.8262    3   0   2        12
                32.89         15.03        2.7234    3   1   2        12
                32.89         23.40        2.7234    3   2   1        12
                36.35          1.32        2.4714    4   1   0        12
                36.35          2.00        2.4714    3   2   2        12
                38.51          2.11        2.3377    3   3   1        12
                41.57          3.65        2.1725    3   3   2        12
                43.51          8.87        2.0800    4   2   2        12
                45.38          5.67        1.9984    4   3   1        12
                45.38          5.23        1.9984    4   1   3        12
                48.08          2.05        1.8922    4   3   2        12
                48.08          1.62        1.8922    5   0   2        12
                51.52          3.24        1.7739    4   4   1        12
                52.35          1.19        1.7476    5   0   3        12
                55.60          4.40        1.6530    6   1   1        12
                55.60          3.03        1.6530    5   3   2        12
                55.60          3.87        1.6530    5   2   3        12
                57.17          1.46        1.6112    6   0   2        12
                57.17          1.81        1.6112    6   2   0        12
                58.72          1.96        1.5724    5   1   4        12
                61.74          1.96        1.5024    6   3   1        12
                63.22          1.40        1.4708    4   4   4         4
                67.55          1.41        1.3867    7   2   1        12
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       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.