Penkvilksite Merlino S, Pasero M, Artioli G, Khomyakov A P American Mineralogist 79 (1994) 1185-1193 Penkvilksite, a new kind of silicate structure: OD character, X-ray single-crystal (1M), and powder Rietveld (2O) refinements of two MDO polytypes Note: polytype 2O _database_code_amcsd 0001688 CELL PARAMETERS: 16.3721 8.7492 7.4020 90.000 90.000 90.000 SPACE GROUP: Pnca X-RAY WAVELENGTH: 1.541838 Cell Volume: 1060.283 Density (g/cm3): 2.647 MAX. ABS. INTENSITY / VOLUME**2: 7.494935166 RIR: 0.922 RIR based on corundum from Acta Crystallographica A38 (1982) 733-739 2-THETA INTENSITY D-SPACING H K L Multiplicity 10.81 100.00 8.1861 2 0 0 2 14.82 27.72 5.9776 2 1 0 4 15.68 8.85 5.6510 0 1 1 4 16.60 40.71 5.3417 1 1 1 8 19.08 27.72 4.6505 2 1 1 8 20.30 9.34 4.3746 0 2 0 2 21.71 16.53 4.0930 4 0 0 2 22.65 12.28 3.9256 3 1 1 8 23.05 3.59 3.8582 2 2 0 4 24.00 2.52 3.7074 4 1 0 4 24.05 2.87 3.7010 0 0 2 2 24.66 6.30 3.6099 1 0 2 4 26.04 19.88 3.4214 2 2 1 8 26.43 47.28 3.3724 2 0 2 4 26.71 11.01 3.3370 1 1 2 8 26.90 44.98 3.3148 4 1 1 8 28.36 6.73 3.1467 2 1 2 8 28.80 29.60 3.0996 3 2 1 8 29.15 46.42 3.0631 3 0 2 4 31.58 33.20 2.8332 5 1 1 8 32.15 4.01 2.7843 1 2 2 8 32.59 6.93 2.7473 2 3 0 4 32.62 7.37 2.7452 4 0 2 4 32.82 1.52 2.7287 6 0 0 2 33.01 14.06 2.7134 0 3 1 4 33.48 32.98 2.6769 1 3 1 8 33.55 1.81 2.6709 2 2 2 8 34.23 1.78 2.6193 4 1 2 8 34.83 23.37 2.5756 2 3 1 8 35.79 9.35 2.5091 3 2 2 8 36.36 5.95 2.4710 5 2 1 8 36.57 18.25 2.4572 6 1 1 8 37.00 2.77 2.4296 3 3 1 8 37.89 1.74 2.3747 0 1 3 4 38.11 9.51 2.3614 5 1 2 8 38.30 3.56 2.3501 1 1 3 8 39.51 5.41 2.2807 2 1 3 8 39.73 4.39 2.2686 1 3 2 8 40.91 1.05 2.2059 2 3 2 8 41.27 8.47 2.1873 0 4 0 2 41.47 2.55 2.1775 3 1 3 8 42.79 2.16 2.1132 2 4 0 4 44.09 4.98 2.0540 4 1 3 8 44.26 2.03 2.0465 8 0 0 2 44.59 2.83 2.0320 2 4 1 8 45.35 2.43 1.9996 3 2 3 8 45.52 3.26 1.9927 8 1 0 4 45.66 4.81 1.9869 7 2 1 8 45.90 4.78 1.9772 7 0 2 4 46.25 1.14 1.9628 6 2 2 8 46.37 1.62 1.9580 3 4 1 8 47.11 2.23 1.9291 4 4 0 4 47.24 1.99 1.9242 8 1 1 8 47.24 1.04 1.9240 6 3 1 8 47.28 1.79 1.9224 5 1 3 8 48.66 1.12 1.8713 1 3 3 8 49.15 2.98 1.8537 8 2 0 4 49.68 5.87 1.8351 2 4 2 8 50.98 1.08 1.7913 6 1 3 8 50.99 5.73 1.7909 8 0 2 4 51.31 10.19 1.7806 3 3 3 8 51.59 3.65 1.7716 7 3 1 8 51.71 1.79 1.7677 2 1 4 8 52.13 1.64 1.7546 8 1 2 8 52.87 3.87 1.7316 9 1 1 8 53.31 3.55 1.7184 3 1 4 8 53.55 1.55 1.7112 2 5 0 4 53.56 7.32 1.7111 4 3 3 8 53.57 1.95 1.7107 4 4 2 8 53.71 3.55 1.7067 6 4 0 4 53.79 9.84 1.7043 0 2 4 4 54.41 2.41 1.6862 4 0 4 4 55.04 1.52 1.6685 2 2 4 8 55.08 1.20 1.6672 2 5 1 8 55.23 3.11 1.6630 6 4 1 8 55.44 1.43 1.6574 8 2 2 8 55.50 1.66 1.6557 4 1 4 8 56.21 1.08 1.6365 7 3 2 8 56.62 1.24 1.6256 3 5 1 8 57.26 2.03 1.6090 4 5 0 4 58.63 1.47 1.5746 1 5 2 8 58.72 3.14 1.5723 4 5 1 8 58.91 2.26 1.5678 3 4 3 8 59.52 2.35 1.5532 2 5 2 8 59.64 6.67 1.5502 6 3 3 8 59.66 1.36 1.5498 6 4 2 8 60.30 1.42 1.5348 2 3 4 8 60.45 6.26 1.5315 6 0 4 4 60.68 1.29 1.5261 8 3 2 8 61.98 6.98 1.4973 10 0 2 4 62.11 2.16 1.4944 8 4 0 4 64.04 2.51 1.4539 1 1 5 8 64.50 3.19 1.4447 6 5 1 8 64.89 2.05 1.4370 2 1 5 8 65.53 1.84 1.4244 5 5 2 8 65.94 3.62 1.4166 10 2 2 8 66.14 1.71 1.4127 0 4 4 4 66.50 1.63 1.4061 2 5 3 8 66.73 1.56 1.4018 10 3 1 8 67.61 1.42 1.3857 8 4 2 8 67.70 1.54 1.3839 3 6 1 8 68.21 1.24 1.3748 4 1 5 8 68.24 1.05 1.3743 9 4 1 8 68.81 1.40 1.3643 12 0 0 2 70.18 1.84 1.3410 7 4 3 8 70.85 2.33 1.3300 8 5 0 4 71.68 1.48 1.3166 3 6 2 8 72.19 1.15 1.3085 9 3 3 8 73.66 1.09 1.2861 6 6 0 4 75.37 2.11 1.2611 11 1 3 8 75.70 3.43 1.2564 2 5 4 8 75.70 2.13 1.2563 4 3 5 8 76.04 1.43 1.2516 8 5 2 8 77.21 2.00 1.2355 10 4 2 8 77.91 1.25 1.2262 10 0 4 4 78.78 1.62 1.2148 6 6 2 8 79.68 1.01 1.2033 3 0 6 4 80.25 1.86 1.1962 3 4 5 8 80.89 1.41 1.1883 6 3 5 8 81.33 1.52 1.1830 12 1 3 8 88.69 1.72 1.1030 4 6 4 8 ================================================================================ XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.