Calcite
      Antao S M, Hassan I
      The Canadian Mineralogist 48 (2010) 1225-1236
      Temperature dependence of the structural parameters
      in the transformation of aragonite to calcite,
      as determined from in situ synchrotron powder X-ray-diffraction data
      Locality: Cuenca, Spain
      Note: T = 644 C
      Note: P = 101 kPa
      _database_code_amcsd 0017866

      CELL PARAMETERS:    4.9761   4.9761  17.4163   90.000   90.000  120.000
      SPACE GROUP: R-3c      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    373.478
      Density (g/cm3):      2.670
      MAX. ABS. INTENSITY / VOLUME**2:      23.60659029    
      RIR:      2.879
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                23.03          7.98        3.8624    0   1   2         6
                29.16        100.00        3.0629    1   0   4         6
                30.80          1.49        2.9027    0   0   6         2
                36.10         14.15        2.4880    1   1   0         6
                39.40         13.02        2.2869    1   1   3        12
                43.26         12.32        2.0916    2   0   2         6
                46.75         16.25        1.9432    0   1   8         6
                47.06          5.38        1.9312    0   2   4         6
                48.17         15.90        1.8891    1   1   6        12
                56.77          1.90        1.6217    2   1   1        12
                57.57          7.15        1.6010    1   2   2        12
                60.45          1.88        1.5314    2   0   8         6
                60.62          1.27        1.5275    1   1   9        12
                60.71          3.70        1.5256    2   1   4        12
                64.17          2.14        1.4514    0   0  12         2
                64.91          3.28        1.4365    3   0   0         6
                69.38          1.44        1.3545    0   2  10         6
                72.47          1.67        1.3042    1   2   8        12
                75.89          1.36        1.2537    1   1  12        12
                80.79          1.36        1.1896    2   1  10        12
================================================================================
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.