Eucairite Diffraction data computed using the structure from the paper listed below, along with the cell parameters refined from the powder pattern for R060639 Frueh A J, Czamanske G K, Knight C Zeitschrift fur Kristallographie 108 (1957) 389-396 The crystallography of eucairite, CuAgSe Locality: Skrikerum, Sweden Sample: tetragonal subcell CELL PARAMETERS: 4.080663 4.080663 6.343591 90.00000 90.00000 90.00000 ALTERNATE SETTING FOR SPACE GROUP: P4/nmm ATOM X Y Z OCCUPANCY ISO(B) Cu 0.25000 0.75000 0.10500 0.500 0.700 Ag 0.25000 0.25000 0.44900 1.000 1.000 Se 0.25000 0.25000 0.87300 1.000 0.600 X-RAY WAVELENGTH: 0.710730 BOUNDS ON TWO THETA: 10.0 40.0 LIMITS IMPOSED ON THE INDICES ARE: +/- 3 +/- 3 +/- 6 MAX. ABS. INTENSITY / VOLUME**2: 643.3049642 The INTENSITY cut off value is 1.00 2-THETA INTENSITY D-SPACING H K L 11.88 5.26 3.4319 1 0 1 12.86 24.04 3.1718 0 0 2 14.14 51.67 2.8855 1 1 0 15.54 59.03 2.6265 1 1 1 16.30 100.00 2.5043 1 0 2 19.15 14.22 2.1344 1 1 2 19.33 15.91 2.1145 0 0 3 20.04 87.82 2.0403 2 0 0 21.80 2.46 1.8774 1 0 3 23.35 1.78 1.7538 2 1 1 23.87 15.77 1.7160 2 0 2 24.02 13.06 1.7056 1 1 3 25.93 48.95 1.5818 2 1 2 25.86 3.46 1.5859 0 0 4 27.78 8.79 1.4782 1 0 4 27.97 19.43 1.4683 2 0 3 28.48 27.62 1.4427 2 2 0 29.77 1.43 1.3816 2 1 3 31.35 5.89 1.3133 2 2 2 31.92 8.32 1.2904 3 1 0 32.59 9.33 1.2645 3 1 1 32.48 1.74 1.2687 0 0 5 32.98 10.47 1.2501 3 0 2 32.93 5.97 1.2521 2 0 4 34.06 12.01 1.2115 1 0 5 34.54 3.60 1.1953 3 1 2 34.49 7.70 1.1971 2 1 4 34.64 8.80 1.1918 2 2 3 37.58 5.37 1.1015 3 1 3 38.45 3.55 1.0774 2 0 5 38.88 10.98 1.0659 3 2 2 38.84 3.11 1.0672 2 2 4 38.84 3.11 1.0672 2 2 4 XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.