Tumchaite Diffraction data computed using the structure from the paper listed below, along with the cell parameters refined from single crystal data of R070047. Subbotin V V, Merlino S, Pushcharovsky D Y, Pakhomovsky Y A, Ferro O, Bogdanova A N, Voloshin A V, Sorokhtina N V, Zubkova N V American Mineralogist 85 (2000) 1516-1520 Tumchaite Na2(Zr,Sn)Si4O11.2H2O - a new mineral from carbonatites of the Vuoriyarvi alkali-ultrabasic massif, Murmansk Region, Russia CELL PARAMETERS: 9.1280 8.8184 7.5300 90.000 113.156 90.000 SPACE GROUP: P2_1/c ATOM X Y Z OCCUPANCY ISO(B) Zr 0.00000 0.50000 0.00000 0.800 0.600 Sn 0.00000 0.50000 0.00000 0.200 0.600 Si 0.16690 0.15820 0.19930 1.000 0.734 Si 0.31760 0.44210 0.41240 1.000 0.734 Na 0.20510 0.68840 0.71090 1.000 1.919 O 0.31480 0.26590 0.34540 1.000 1.019 O 0.11640 0.03460 0.31870 1.000 0.995 O 0.02600 0.26760 0.06600 1.000 1.034 O 0.24710 0.05430 0.07910 1.000 1.034 O 0.21450 0.54250 0.22990 1.000 0.947 O 0.50000 0.00000 0.00000 1.000 1.240 O 0.37090 0.69210 0.03710 1.000 2.503 H 0.49800 0.68400 0.07500 1.000 3.948 H 0.35200 0.60200 0.09000 1.000 3.948 X-RAY WAVELENGTH: 1.541838 BOUNDS ON TWO THETA: 5.0 90.0 LIMITS IMPOSED ON THE INDICES ARE: +/- 7 +/- 8 +/- 6 MAX. ABS. INTENSITY / VOLUME**2: 15.99656671 The INTENSITY cut off value is 1.00 2-THETA INTENSITY D-SPACING H K L 10.54 100.00 8.3926 1 0 0 14.57 11.61 6.0794 1 1 0 16.28 2.39 5.4456 0 1 1 16.44 67.96 5.3929 -1 1 1 20.14 13.29 4.4092 0 2 0 21.17 3.33 4.1963 2 0 0 22.04 51.99 4.0339 1 1 1 22.39 11.26 3.9702 -2 1 1 22.78 10.75 3.9033 1 2 0 23.48 1.54 3.7892 2 1 0 23.93 3.09 3.7190 0 2 1 24.04 3.63 3.7021 -1 2 1 25.73 7.69 3.4620 -1 1 2 25.74 2.79 3.4617 0 0 2 26.15 56.51 3.4080 -2 0 2 27.68 1.48 3.2223 0 1 2 28.22 14.26 3.1618 1 2 1 28.51 1.96 3.1308 -2 2 1 29.38 5.04 3.0397 2 2 0 30.66 52.48 2.9163 2 1 1 31.10 2.99 2.8761 -3 1 1 31.99 3.32 2.7975 3 0 0 32.27 3.70 2.7742 1 3 0 32.28 21.54 2.7734 -3 0 2 32.89 11.21 2.7228 0 2 2 33.11 2.09 2.7057 0 3 1 33.19 45.63 2.6992 -1 3 1 33.23 2.53 2.6960 1 1 2 35.47 1.85 2.5306 2 2 1 35.86 1.43 2.5042 -3 2 1 36.42 2.90 2.4668 1 3 1 36.65 10.93 2.4521 -2 3 1 37.54 9.31 2.3959 -1 1 3 37.76 4.82 2.3826 1 2 2 38.10 2.15 2.3622 3 2 0 38.87 2.29 2.3168 -1 3 2 39.74 3.29 2.2682 2 0 2 40.40 3.90 2.2326 0 1 3 40.56 5.62 2.2244 3 1 1 40.94 7.35 2.2046 0 4 0 41.02 10.83 2.2002 -3 1 3 41.04 3.65 2.1993 -4 1 1 41.09 1.95 2.1967 2 1 2 42.39 3.56 2.1323 1 4 0 43.11 2.36 2.0982 4 0 0 44.38 1.61 2.0412 4 1 0 44.45 2.37 2.0384 3 2 1 44.89 1.05 2.0190 -4 2 1 44.94 1.93 2.0169 2 2 2 45.70 4.47 1.9851 -4 2 2 45.76 1.71 1.9828 1 4 1 45.86 1.33 1.9786 1 1 3 46.53 4.01 1.9517 2 4 0 46.80 5.77 1.9413 -4 1 3 48.02 3.51 1.8946 4 2 0 48.07 1.98 1.8930 -2 3 3 48.99 4.39 1.8595 0 4 2 49.22 3.78 1.8511 -2 4 2 49.28 7.92 1.8492 3 0 2 50.39 2.26 1.8108 3 3 1 50.42 1.57 1.8098 3 1 2 50.55 2.02 1.8056 -1 1 4 50.79 9.55 1.7976 -3 3 3 50.85 1.75 1.7957 2 3 2 51.80 5.22 1.7651 -5 1 1 52.61 4.48 1.7395 1 4 2 52.87 4.77 1.7316 3 4 0 52.89 9.64 1.7310 -2 2 4 52.90 1.37 1.7308 0 0 4 53.07 1.27 1.7258 -3 4 2 53.31 1.74 1.7185 2 1 3 53.62 2.72 1.7091 0 5 1 53.75 2.25 1.7053 3 2 2 53.80 3.60 1.7040 -4 0 4 53.87 1.70 1.7018 -1 2 4 54.64 2.05 1.6796 -5 2 2 54.68 1.23 1.6785 5 0 0 54.88 1.79 1.6731 -4 1 4 54.96 3.78 1.6706 1 3 3 55.78 7.33 1.6479 -4 3 3 55.94 3.50 1.6438 1 5 1 56.61 1.05 1.6259 2 5 0 57.17 1.05 1.6112 0 2 4 57.96 1.30 1.5911 3 4 1 58.37 2.30 1.5809 2 4 2 58.53 2.02 1.5769 1 0 4 59.01 1.60 1.5654 -4 4 2 59.55 1.05 1.5525 -3 3 4 59.78 3.71 1.5469 4 3 1 59.79 4.32 1.5467 -5 0 4 59.86 3.81 1.5451 4 0 2 60.25 1.02 1.5360 -5 3 1 60.44 2.67 1.5318 2 5 1 60.69 3.25 1.5258 -3 5 1 60.90 2.50 1.5212 -6 0 2 60.96 2.44 1.5199 4 4 0 61.63 4.19 1.5050 2 3 3 62.77 1.67 1.4803 5 1 1 62.99 3.99 1.4758 -3 1 5 63.84 1.85 1.4581 4 2 2 64.35 1.44 1.4477 1 6 0 64.64 1.41 1.4420 -1 1 5 64.78 1.89 1.4391 -1 5 3 64.84 1.87 1.4380 -6 2 2 65.17 2.59 1.4314 -2 4 4 65.38 1.09 1.4273 -4 1 5 66.04 1.85 1.4148 -1 4 4 66.72 2.65 1.4020 -5 4 2 66.75 1.75 1.4013 0 5 3 66.86 1.61 1.3993 3 5 1 66.89 2.11 1.3988 6 0 0 67.19 1.17 1.3932 -3 5 3 67.21 1.21 1.3930 -4 5 1 68.54 1.02 1.3691 -1 6 2 68.61 1.69 1.3679 0 1 5 69.64 1.61 1.3501 4 5 0 69.67 1.40 1.3496 -2 6 2 69.75 1.12 1.3482 -4 4 4 69.97 1.59 1.3446 3 3 3 70.41 1.85 1.3373 5 3 1 70.93 1.56 1.3286 -6 3 1 72.18 2.33 1.3088 -1 3 5 74.19 2.53 1.2782 -7 1 3 74.42 1.39 1.2748 -1 5 4 75.97 3.17 1.2526 0 3 5 76.01 2.14 1.2521 -6 4 2 77.13 1.05 1.2367 -5 3 5 77.37 1.46 1.2334 2 6 2 77.64 1.23 1.2298 -5 5 3 79.23 1.32 1.2091 -1 0 6 80.11 1.53 1.1979 -2 2 6 82.91 1.94 1.1644 -7 3 1 83.86 1.01 1.1537 -5 2 6 84.14 1.09 1.1506 3 6 2 84.36 1.99 1.1482 5 1 3 85.60 1.05 1.1347 -6 5 3 86.96 1.30 1.1203 0 6 4 87.69 1.17 1.1129 -4 6 4 88.40 1.11 1.1058 5 6 0 89.16 1.70 1.0983 4 2 4 ================================================================================ XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.