Perrierite-(La) Chukanov N V, Blass G, Pekov I V, Belakovskiy D I, Van K V, Rastsvetaeva R K, Aksenov S M Zapiski Rossiiskogo Mineralogicheskogo Obshchetstva 140 (2011) 34-44 Perrierite-(La) (La,Ce,Ca)4Fe2+(Ti,Fe)4(Si2O7)2O8 - a new mineral species from volcanic region Eifel, Germany Locality: Dellen pumice quarry, Eifel Mountains, Rhineland-Palatinate, Germany _database_code_amcsd 0019036 CELL PARAMETERS: 13.6680 5.6601 11.7430 90.000 113.640 90.000 SPACE GROUP: P2_1/a X-RAY WAVELENGTH: 1.541838 Cell Volume: 832.229 Density (g/cm3): 4.882 MAX. ABS. INTENSITY / VOLUME**2: 30.98036730 RIR: 2.066 RIR based on corundum from Acta Crystallographica A38 (1982) 733-739 2-THETA INTENSITY D-SPACING H K L Multiplicity 8.22 18.79 10.7576 0 0 1 2 13.21 7.31 6.7044 -2 0 1 2 14.15 3.13 6.2605 2 0 0 2 16.48 14.53 5.3788 0 0 2 2 17.19 24.29 5.1576 1 1 0 4 17.80 5.18 4.9826 -1 1 1 4 20.29 2.13 4.3774 1 1 1 4 21.82 25.01 4.0740 -1 1 2 4 23.12 2.68 3.8473 -2 0 3 2 24.83 13.63 3.5859 0 0 3 2 25.09 26.72 3.5489 -3 1 1 4 25.83 20.52 3.4490 1 1 2 4 26.36 6.23 3.3814 -3 1 2 4 27.86 3.94 3.2025 -1 1 3 4 28.51 21.08 3.1303 4 0 0 2 29.40 27.30 3.0376 -4 0 3 2 30.01 88.71 2.9774 -3 1 3 4 30.33 100.00 2.9472 3 1 1 4 30.46 4.51 2.9343 -2 0 4 2 31.61 40.98 2.8300 0 2 0 2 32.69 3.45 2.7397 1 1 3 4 32.72 4.07 2.7369 0 2 1 4 32.85 12.23 2.7266 4 0 1 2 33.32 41.02 2.6894 0 0 4 2 34.15 7.14 2.6257 -4 0 4 2 34.40 7.04 2.6073 -2 2 1 4 34.79 1.80 2.5788 2 2 0 4 34.99 10.22 2.5646 -1 1 4 4 35.79 5.29 2.5086 3 1 2 4 35.85 15.04 2.5045 0 2 2 4 36.05 9.89 2.4913 -2 2 2 4 36.58 8.03 2.4566 -5 1 2 4 37.02 1.21 2.4286 -5 1 1 4 37.17 1.63 2.4188 2 2 1 4 38.65 3.29 2.3297 4 0 2 2 39.53 1.08 2.2797 -2 2 3 4 39.57 4.58 2.2778 -6 0 2 2 40.23 9.08 2.2416 -4 0 5 2 40.60 4.93 2.2220 -6 0 1 2 40.61 6.04 2.2215 0 2 3 4 41.55 24.42 2.1732 -4 2 1 4 41.77 11.76 2.1625 -4 2 2 4 41.92 11.43 2.1550 -3 1 5 4 42.39 10.83 2.1321 3 1 3 4 42.78 1.30 2.1136 -1 1 5 4 42.90 3.84 2.1082 -6 0 4 2 43.09 6.78 2.0993 4 2 0 4 43.36 3.42 2.0868 6 0 0 2 43.72 6.88 2.0706 -4 2 3 4 46.09 1.11 1.9693 -5 1 5 4 46.23 2.83 1.9635 4 2 1 4 46.59 32.46 1.9495 0 2 4 4 46.66 10.36 1.9467 2 2 3 4 46.95 1.18 1.9352 -6 0 5 2 47.22 2.45 1.9248 -4 2 4 4 48.59 2.55 1.8739 5 1 2 4 49.50 8.36 1.8412 -7 1 2 4 49.64 9.03 1.8365 -7 1 3 4 49.80 2.90 1.8309 3 1 4 4 50.05 1.29 1.8225 2 0 5 2 50.56 8.77 1.8052 -2 2 5 4 50.76 1.61 1.7986 4 2 2 4 50.83 3.56 1.7962 -1 3 2 4 50.90 3.39 1.7940 -7 1 1 4 51.10 7.51 1.7876 -1 1 6 4 51.30 2.58 1.7809 -7 1 4 4 51.50 2.72 1.7744 -6 2 2 4 51.98 6.55 1.7592 -5 1 6 4 52.04 3.29 1.7572 -4 2 5 4 52.15 2.90 1.7539 -6 2 3 4 52.26 2.94 1.7504 -6 0 6 2 52.35 9.73 1.7477 -6 2 1 4 52.50 3.38 1.7431 -3 3 1 4 52.90 2.78 1.7309 1 3 2 4 53.05 6.75 1.7262 4 0 4 2 53.06 5.53 1.7261 6 0 2 2 53.11 1.10 1.7245 2 2 4 4 53.50 1.41 1.7128 0 2 5 4 53.69 6.72 1.7072 -8 0 3 2 54.06 2.87 1.6963 -8 0 2 2 54.26 6.15 1.6907 -6 2 4 4 54.64 3.92 1.6796 6 2 0 4 55.00 4.69 1.6695 -4 0 7 2 55.31 12.47 1.6609 -3 3 3 4 55.50 12.22 1.6556 3 3 1 4 55.87 2.01 1.6457 -8 0 1 2 56.43 1.79 1.6305 4 2 3 4 57.11 2.85 1.6129 1 1 6 4 57.24 1.34 1.6094 -8 0 5 2 57.32 5.97 1.6075 -3 1 7 4 57.56 1.03 1.6013 -2 2 6 4 57.71 3.28 1.5974 -6 2 5 4 57.88 10.43 1.5932 3 1 5 4 57.89 7.51 1.5930 7 1 1 4 58.50 1.48 1.5777 -1 3 4 4 58.74 3.90 1.5718 -7 1 6 4 58.82 2.76 1.5700 -5 1 7 4 59.05 1.15 1.5644 3 3 2 4 59.52 1.29 1.5531 6 0 3 2 59.59 1.64 1.5515 -5 3 2 4 60.22 3.25 1.5368 0 0 7 2 61.01 1.46 1.5188 -8 0 6 2 61.20 3.01 1.5146 0 2 6 4 63.08 1.85 1.4737 4 2 4 4 63.18 1.31 1.4717 7 1 2 4 63.39 1.20 1.4673 8 0 1 2 63.40 1.30 1.4672 -4 0 8 2 63.43 2.82 1.4664 -3 3 5 4 63.79 3.07 1.4591 3 3 3 4 63.95 1.19 1.4559 -9 1 4 4 64.22 2.99 1.4503 -7 1 7 4 64.84 1.72 1.4380 -4 2 7 4 65.35 3.17 1.4279 -2 2 7 4 65.63 3.33 1.4226 -8 2 1 4 65.93 1.28 1.4167 -8 0 7 2 66.02 11.30 1.4150 0 4 0 2 66.58 1.74 1.4046 3 1 6 4 66.88 4.16 1.3990 -8 2 5 4 68.97 5.39 1.3616 6 2 3 4 69.23 1.81 1.3571 -1 1 8 4 69.36 2.39 1.3550 -7 3 2 4 69.47 2.22 1.3531 -7 3 3 4 69.59 2.35 1.3510 9 1 0 4 69.96 4.06 1.3447 0 0 8 2 69.98 1.19 1.3443 -10 0 2 2 70.35 2.79 1.3383 -8 2 6 4 70.50 1.24 1.3358 -7 3 1 4 70.66 1.96 1.3331 -1 3 6 4 71.39 2.59 1.3212 -5 3 6 4 72.57 1.40 1.3026 8 2 1 4 72.74 1.35 1.3000 -10 0 6 2 73.44 2.07 1.2894 4 4 0 4 73.89 2.62 1.2827 -4 4 3 4 74.87 4.11 1.2682 -6 2 8 4 74.97 1.05 1.2669 -8 2 7 4 75.30 1.39 1.2621 -3 1 9 4 75.73 1.35 1.2560 4 4 1 4 75.85 3.48 1.2543 6 2 4 4 75.93 2.05 1.2532 -3 3 7 4 75.95 1.19 1.2529 3 1 7 4 75.99 5.70 1.2523 0 4 4 4 76.41 3.69 1.2464 3 3 5 4 76.42 2.67 1.2463 7 3 1 4 76.47 1.06 1.2456 -4 4 4 4 77.17 1.26 1.2361 -7 3 6 4 77.75 1.92 1.2283 -10 2 4 4 78.80 2.99 1.2146 0 2 8 4 78.90 2.31 1.2133 -11 1 4 4 79.75 1.26 1.2025 -11 1 5 4 79.79 1.15 1.2020 -6 4 2 4 80.22 1.11 1.1966 -4 4 5 4 80.79 3.22 1.1896 -11 1 2 4 81.19 2.55 1.1847 -4 2 9 4 81.79 2.17 1.1776 -11 1 6 4 82.06 1.21 1.1743 -7 3 7 4 84.64 1.68 1.1450 10 2 0 4 85.01 3.57 1.1410 7 1 5 4 85.09 1.24 1.1401 -10 2 7 4 86.13 1.63 1.1290 3 1 8 4 86.61 1.49 1.1240 10 0 2 2 87.02 1.31 1.1197 9 3 0 4 87.39 1.40 1.1159 11 1 0 4 87.48 1.78 1.1150 -8 2 9 4 89.37 1.48 1.0963 -11 1 8 4 89.57 2.14 1.0943 4 4 4 4 89.58 1.74 1.0943 6 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.