Gugiaite
      Yang Z, Fleck M, Pertlik F, Tillmanns E, Tao K
      Neues Jahrbuch fur Mineralogie, Monatshefte 2001 (2001) 186-192
      The crystal structure of natural gugiaite, Ca2BeSi2O7
      Locality: skarn rocks in the Gugia alkaline complex, Liaoning Province, China
      Note, z coordinate of Ca is altered to reproduce reported Ca-O bond lengths
      _database_code_amcsd 0014911

      CELL PARAMETERS:    7.4330   7.4330   4.9970   90.000   90.000   90.000
      SPACE GROUP: P-42_1m   
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    276.082
      Density (g/cm3):      3.095
      MAX. ABS. INTENSITY / VOLUME**2:      24.79965561    
      RIR:      2.609
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                16.87         18.54        5.2559    1   1   0         4
                21.43          1.49        4.1470    1   0   1         8
                23.94          7.67        3.7165    2   0   0         4
                24.58          6.35        3.6215    1   1   1         4
                26.82          2.52        3.3241    2   1   0         8
                29.96          9.02        2.9821    2   0   1         8
                32.35        100.00        2.7677    2   1   1         8
                34.12          1.82        2.6280    2   2   0         4
                35.94          2.70        2.4985    0   0   2         2
                37.99          7.61        2.3683    1   0   2         8
                38.29          8.00        2.3505    3   1   0         8
                38.71          8.66        2.3259    2   2   1         4
                39.95          5.62        2.2565    1   1   2         4
                40.64          8.36        2.2198    3   0   1         8
                42.50          4.14        2.1270    3   1   1         8
                43.65          3.82        2.0735    2   0   2         8
                45.41          8.36        1.9972    2   1   2         8
                47.72          1.55        1.9057    3   2   1         8
                49.02         10.35        1.8583    4   0   0         4
                50.63          3.69        1.8028    4   1   0         8
                52.21         11.97        1.7520    3   3   0         4
                53.53         13.85        1.7120    3   1   2         8
                54.08          7.65        1.6958    4   1   1         8
                55.14          1.35        1.6657    0   0   3         2
                55.27          2.90        1.6621    4   2   0         8
                58.00          2.12        1.5901    3   2   2         8
                58.09          1.30        1.5878    1   1   3         4
                62.27          1.08        1.4911    4   0   2         8
                62.35          8.79        1.4892    2   1   3         8
                65.02          3.62        1.4345    3   3   2         4
                66.46          2.69        1.4069    2   2   3         4
                70.82          9.93        1.3305    5   2   1         8
                71.85          2.22        1.3140    4   4   0         4
                73.03          1.17        1.2956    3   2   3         8
                76.97          2.73        1.2388    6   0   0         4
                78.12          4.90        1.2234    4   1   3         8
                79.30          1.06        1.2082    5   2   2         8
                81.00          1.00        1.1870    6   1   1         8
                85.97          2.36        1.1307    5   4   1         8
                87.44          1.14        1.1155    3   0   4         8
                87.99          1.65        1.1099    6   0   2         8
                88.67          2.07        1.1031    3   1   4         8
                89.30          1.49        1.0970    5   1   3         8
================================================================================
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.