Pearceite Diffraction data computed using the structure from the paper listed below, along with the cell parameters refined from single crystal data of R090041 Bindi L, Evain M, Menchetti S The Canadian Mineralogist 45 (2007) 321-333 Complex twinning, polytypism and disorder phenomena in the crystal structures of antimonpearceite and arsenpolybasite Locality: St. Joachimsthal, Bohemia, Czech Republic Sample: 221 Note: mineral name has been changed from arsenpolybasite Note: this is type pearceite-T2ac _database_code_amcsd 0006141 CELL PARAMETERS: 14.8830 14.8830 11.9850 90.000 90.000 120.000 SPACE GROUP: P321 ATOM X Y Z OCCUPANCY ISO(B) Ag 0.36371 0.42908 0.10401 1.000 3.071 Ag 0.09037 0.42152 0.13506 0.813 3.948 Cu 0.09040 0.42150 0.13510 0.187 3.948 Ag 0.07803 0.15006 0.11754 0.869 4.493 Cu 0.07800 0.15010 0.11750 0.131 4.493 Ag 0.57112 0.41821 0.11501 1.000 3.995 Ag 0.34634 0.54688 0.39198 1.000 3.521 Ag 0.26987 0.06958 0.39070 1.000 4.579 Ag 0.13407 0.17634 0.37296 1.000 4.532 Ag 0.52522 0.16860 0.37615 1.000 5.488 Ag 0.10038 0.42134 0.39254 1.000 3.537 Ag 0.38282 0.30734 0.36580 1.000 6.909 Cu 0.00000 0.51201 0.50000 1.000 1.982 Cu 0.00000 0.00000 0.50000 1.000 2.613 As 0.33333 0.66667 0.09980 1.000 1.611 As 0.33359 0.16003 0.09832 1.000 1.492 S 0.27150 0.51500 0.19060 1.000 1.879 S -0.01023 0.24020 0.19810 1.000 2.084 S 0.26180 0.24680 0.17770 1.000 2.100 S 0.48390 0.24150 0.19220 1.000 2.108 S 0.49380 0.50125 0.32031 1.000 1.784 S 0.00000 0.00000 0.32010 1.000 1.871 S 0.19530 0.34300 0.46279 1.000 2.163 S 0.33333 0.66667 0.53930 1.000 2.416 S 0.53240 0.53240 0.00000 1.000 4.177 S 0.02480 0.02480 0.00000 0.333 5.527 X-RAY WAVELENGTH: 1.541838 BOUNDS ON TWO THETA: 5.0 90.0 LIMITS IMPOSED ON THE INDICES ARE: +/- 11 +/- 11 +/- 11 MAX. ABS. INTENSITY / VOLUME**2: 40.54989687 The INTENSITY cut off value is 1.00 2-THETA INTENSITY D-SPACING H K L 7.38 41.22 11.9850 0 0 1 13.74 12.46 6.4445 2 0 0 14.01 4.27 6.3220 1 1 1 14.78 6.84 5.9925 0 0 2 15.61 6.58 5.6760 2 0 1 19.67 5.23 4.5130 1 2 1 20.24 4.98 4.3884 0 2 2 23.92 4.58 3.7208 2 2 0 24.91 8.54 3.5748 3 1 0 26.01 2.23 3.4256 1 3 1 26.01 5.51 3.4256 3 1 1 27.68 6.59 3.2223 4 0 0 28.23 10.31 3.1610 2 2 2 28.69 18.87 3.1118 0 4 1 28.69 60.62 3.1118 4 0 1 29.09 3.54 3.0700 1 3 2 29.09 4.29 3.0700 3 1 2 29.82 100.00 2.9962 0 0 4 30.22 2.35 2.9570 3 2 0 30.63 1.11 2.9184 0 1 4 31.15 8.48 2.8709 2 3 1 31.15 39.72 2.8709 3 2 1 31.52 15.58 2.8380 0 4 2 31.52 57.06 2.8380 4 0 2 31.82 6.39 2.8126 4 1 0 32.70 14.70 2.7382 4 1 1 32.70 3.25 2.7382 1 4 1 32.90 1.05 2.7228 2 2 3 33.64 1.12 2.6640 1 3 3 33.80 34.06 2.6517 3 2 2 33.80 37.47 2.6517 2 3 2 35.16 1.22 2.5522 1 2 4 35.25 7.00 2.5461 1 4 2 35.25 7.91 2.5461 4 1 2 35.80 25.71 2.5081 0 4 3 35.80 32.74 2.5081 4 0 3 36.21 9.42 2.4805 3 3 0 36.90 2.03 2.4358 4 2 0 37.01 8.13 2.4290 3 3 1 37.68 31.64 2.3870 4 2 1 37.85 1.62 2.3767 3 2 3 37.85 25.81 2.3767 2 3 3 38.58 19.94 2.3337 2 2 4 39.17 2.94 2.2998 4 1 3 39.17 12.47 2.2998 1 4 3 39.23 2.51 2.2963 3 1 4 39.23 3.09 2.2963 1 3 4 39.50 3.67 2.2816 1 1 5 39.65 1.77 2.2729 1 5 1 40.14 3.49 2.2466 0 2 5 40.14 3.77 2.2466 2 0 5 41.14 24.16 2.1942 0 4 4 41.14 7.46 2.1942 4 0 4 41.83 1.10 2.1594 5 1 2 42.01 2.68 2.1508 1 2 5 42.06 1.10 2.1482 6 0 0 42.67 2.75 2.1189 4 3 0 42.76 1.86 2.1145 0 6 1 42.76 2.94 2.1145 6 0 1 42.97 1.83 2.1046 3 2 4 42.97 4.84 2.1046 2 3 4 43.37 6.87 2.0866 3 4 1 43.37 1.54 2.0866 4 3 1 43.52 12.37 2.0797 2 4 3 44.16 1.89 2.0507 4 1 4 44.16 2.93 2.0507 1 4 4 44.82 5.62 2.0222 0 6 2 44.99 11.06 2.0151 2 2 5 45.56 1.94 1.9909 3 1 5 46.54 1.39 1.9514 2 5 2 46.54 2.16 1.9514 5 2 2 47.26 11.19 1.9232 4 0 5 47.59 3.73 1.9107 3 3 4 47.66 2.88 1.9080 2 0 6 48.09 2.38 1.8920 0 6 3 48.14 1.83 1.8900 2 4 4 48.14 1.70 1.8900 4 2 4 48.64 3.11 1.8719 4 3 3 48.91 5.16 1.8620 3 2 5 48.91 1.43 1.8620 2 3 5 48.96 31.66 1.8604 4 4 0 49.50 1.80 1.8413 5 3 0 49.59 7.05 1.8384 4 4 1 49.99 3.86 1.8244 4 1 5 50.12 1.20 1.8199 3 5 1 50.12 1.21 1.8199 5 3 1 50.12 1.05 1.8199 7 0 1 51.10 1.91 1.7874 6 2 0 51.71 1.12 1.7678 2 6 1 52.41 1.71 1.7458 0 6 4 52.92 1.16 1.7300 4 3 4 53.13 2.84 1.7237 3 3 5 53.50 2.11 1.7128 2 6 2 53.65 1.33 1.7085 4 2 5 53.69 2.87 1.7072 7 1 0 54.01 9.80 1.6978 4 0 6 54.28 2.12 1.6901 1 7 1 54.28 3.99 1.6901 7 1 1 54.40 7.87 1.6865 4 4 3 54.91 1.33 1.6722 5 3 3 55.52 3.33 1.6552 3 2 6 55.52 4.19 1.6552 2 3 6 56.51 1.72 1.6286 4 1 6 57.17 1.05 1.6111 8 0 0 57.74 2.51 1.5968 0 8 1 58.39 7.93 1.5805 4 4 4 58.82 1.42 1.5699 1 7 3 58.82 2.86 1.5699 7 1 3 59.40 5.47 1.5559 0 8 2 59.40 1.12 1.5559 8 0 2 59.88 1.07 1.5446 4 2 6 60.29 1.03 1.5350 6 2 4 61.31 7.19 1.5120 0 4 7 61.31 3.37 1.5120 4 0 7 61.94 3.08 1.4981 0 0 8 62.00 2.11 1.4967 1 8 1 62.12 2.84 1.4942 0 8 3 62.12 1.47 1.4942 8 0 3 62.63 2.12 1.4833 1 7 4 62.63 1.11 1.4833 7 1 4 62.70 3.08 1.4817 2 3 7 62.93 1.17 1.4770 5 5 1 63.28 3.79 1.4697 4 4 5 63.39 2.30 1.4674 6 4 1 63.60 1.55 1.4629 1 8 2 63.60 1.20 1.4629 8 1 2 63.62 1.09 1.4625 4 1 7 64.76 1.18 1.4396 3 7 1 65.82 3.39 1.4190 8 0 4 65.82 1.62 1.4190 0 8 4 66.22 1.56 1.4113 8 1 3 67.34 1.03 1.3906 1 7 5 69.15 2.52 1.3585 0 4 8 70.08 1.69 1.3426 5 6 1 70.46 1.32 1.3364 2 3 8 74.07 1.19 1.2799 6 5 3 75.56 1.14 1.2584 4 6 5 75.56 2.53 1.2584 6 4 5 75.87 2.71 1.2541 0 8 6 81.83 1.09 1.1770 5 6 5 82.15 1.46 1.1733 8 0 7 ================================================================================ XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.