Combeite Fischer R X, Tillmanns E Neues Jahrbuch fur Mineralogie, Monatshefte 1983 (1983) 49-59 Die Kristallstrukturen von naturlichem Na2Ca2Si3O9 vom Mt.Shaheru (Zaire) und aus dem Mayener Feld (Eifel) Note: this is the low-temperature form of combeite Locality: Mayener Feld, Eifel, Germany _database_code_amcsd 0019534 CELL PARAMETERS: 10.4640 10.4640 13.1760 90.000 90.000 120.000 SPACE GROUP: P3_2 X-RAY WAVELENGTH: 1.541838 Cell Volume: 1249.423 Density (g/cm3): 2.792 MAX. ABS. INTENSITY / VOLUME**2: 9.154108297 RIR: 1.068 RIR based on corundum from Acta Crystallographica A38 (1982) 733-739 2-THETA INTENSITY D-SPACING H K L Multiplicity 9.76 2.52 9.0621 1 0 0 3 11.85 2.77 7.4666 0 1 1 3 11.85 4.37 7.4666 1 0 1 3 16.64 12.61 5.3287 0 1 2 3 16.64 1.01 5.3287 1 0 2 3 16.95 18.53 5.2320 1 1 0 3 18.24 2.69 4.8627 2 -1 1 3 18.24 1.39 4.8627 1 1 1 3 20.22 16.63 4.3920 0 0 3 1 20.73 5.63 4.2848 0 2 1 3 21.69 1.24 4.0971 1 1 2 3 22.50 1.85 3.9523 0 1 3 3 23.83 14.26 3.7333 2 0 2 3 26.01 5.40 3.4251 1 2 0 3 26.01 2.48 3.4251 2 1 0 3 26.50 13.98 3.3639 1 1 3 3 26.50 13.66 3.3639 2 -1 3 3 26.90 28.54 3.3150 2 1 1 3 26.90 28.48 3.3150 3 -1 1 3 28.30 1.23 3.1536 0 2 3 3 28.84 5.66 3.0958 1 0 4 3 29.39 3.31 3.0390 -1 3 2 3 29.39 3.26 3.0390 1 2 2 3 29.57 17.03 3.0207 3 0 0 3 32.11 1.62 2.7875 2 -1 4 3 33.17 2.12 2.7009 3 -1 3 3 33.64 99.99 2.6643 0 2 4 3 34.28 98.21 2.6160 2 2 0 3 34.97 1.64 2.5659 4 -2 1 3 34.97 2.50 2.5659 2 2 1 3 35.48 5.97 2.5304 0 1 5 3 35.72 1.12 2.5134 1 3 0 3 36.39 1.92 2.4689 3 1 1 3 38.33 1.80 2.3483 -1 4 2 3 38.33 3.27 2.3483 4 -1 2 3 38.33 3.11 2.3483 3 1 2 3 39.56 8.03 2.2780 2 0 5 3 40.40 2.89 2.2328 4 0 1 3 40.52 1.11 2.2263 0 3 4 3 41.10 7.27 2.1960 0 0 6 1 42.18 17.13 2.1424 0 4 2 3 43.32 2.19 2.0886 -1 3 5 3 43.32 2.13 2.0886 1 2 5 3 44.10 1.65 2.0536 2 3 1 3 45.03 1.53 2.0134 0 4 3 3 45.39 1.24 1.9981 4 -1 4 3 45.39 1.73 1.9981 3 1 4 3 46.43 1.57 1.9556 -1 5 1 3 48.79 58.46 1.8666 4 0 4 3 49.46 3.60 1.8429 1 0 7 3 50.62 4.34 1.8032 1 4 3 3 50.62 4.34 1.8032 -1 5 3 3 50.85 6.66 1.7955 0 5 1 3 52.02 1.34 1.7581 5 -2 4 3 52.02 1.22 1.7581 3 2 4 3 52.47 2.76 1.7440 3 3 0 3 52.65 5.59 1.7383 0 2 7 3 54.09 1.54 1.6954 4 1 4 3 54.09 1.06 1.6954 5 -1 4 3 55.72 3.45 1.6496 2 1 7 3 55.72 3.82 1.6496 3 -1 7 3 56.54 1.10 1.6276 5 1 0 3 56.80 1.51 1.6209 3 3 3 3 56.80 1.41 1.6209 6 -3 3 3 58.40 1.26 1.5801 1 5 2 3 58.40 1.21 1.5801 -1 6 2 3 59.74 11.78 1.5479 2 0 8 3 60.98 9.80 1.5195 2 4 4 3 60.98 9.62 1.5195 -2 6 4 3 61.38 8.52 1.5103 6 0 0 3 61.83 1.36 1.5005 6 0 1 3 62.77 1.99 1.4804 4 3 1 3 62.77 2.20 1.4804 7 -3 1 3 63.55 2.06 1.4640 0 0 9 1 67.08 3.74 1.3953 3 2 7 3 67.08 3.57 1.3953 5 -2 7 3 68.04 3.33 1.3778 5 2 3 3 68.04 3.33 1.3778 7 -2 3 3 70.72 7.97 1.3322 0 4 8 3 71.63 1.49 1.3174 3 0 9 3 72.23 7.48 1.3080 4 4 0 3 72.94 1.08 1.2969 -3 7 5 3 73.10 1.34 1.2946 3 5 0 3 73.10 1.26 1.2946 5 3 0 3 73.33 1.18 1.2910 -2 5 8 3 73.33 1.36 1.2910 2 3 8 3 73.51 1.27 1.2884 7 0 1 3 74.23 1.67 1.2775 4 -2 9 3 74.23 1.64 1.2775 2 2 9 3 80.99 2.98 1.1871 4 2 8 3 80.99 2.97 1.1871 6 -2 8 3 82.08 3.31 1.1741 6 2 4 3 82.08 3.26 1.1741 8 -2 4 3 83.47 1.22 1.1580 2 0 11 3 85.97 1.71 1.1307 1 2 11 3 85.97 1.76 1.1307 -1 3 11 3 ================================================================================ XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.