Miguelromeroite Kampf A R, Ross C R American Mineralogist 73 (1988) 1172-1178 End-member villyaellenite from Mapimi, Durango, Mexico: Descriptive mineralogy, crystal structure, and implications for the ordering of Mn and Ca in type villyaellenite Note: refinition of villyaellenite and introduction of miguelromeroite results in a name change for this structure refinement Locality: Mapimi, Durango, Mexico _database_code_amcsd 0001199 CELL PARAMETERS: 18.0150 9.2610 9.7700 90.000 96.238 90.000 SPACE GROUP: C2/c X-RAY WAVELENGTH: 1.541838 Cell Volume: 1620.346 Density (g/cm3): 3.736 MAX. ABS. INTENSITY / VOLUME**2: 19.03094363 RIR: 1.658 RIR based on corundum from Acta Crystallographica A38 (1982) 733-739 2-THETA INTENSITY D-SPACING H K L Multiplicity 9.88 31.54 8.9542 2 0 0 2 10.75 43.69 8.2261 1 1 0 4 13.76 13.03 6.4376 -1 1 1 4 14.45 9.21 6.1281 1 1 1 4 17.68 3.45 5.0174 3 1 0 4 18.27 6.45 4.8561 0 0 2 2 19.15 15.99 4.6336 -3 1 1 4 19.17 5.87 4.6305 0 2 0 2 19.83 15.09 4.4775 -2 0 2 2 19.83 14.00 4.4771 4 0 0 2 20.65 17.96 4.3004 3 1 1 4 21.26 1.33 4.1797 0 2 1 4 21.61 7.51 4.1131 2 2 0 4 21.75 4.78 4.0867 2 0 2 2 23.06 9.59 3.8572 -2 2 1 4 23.91 17.12 3.7213 2 2 1 4 25.55 2.70 3.4858 -4 0 2 2 26.60 15.43 3.3512 0 2 2 4 26.69 1.98 3.3405 5 1 0 4 26.69 15.26 3.3403 3 1 2 4 27.34 42.91 3.2622 -5 1 1 4 27.71 90.25 3.2188 -2 2 2 4 27.72 9.75 3.2186 4 2 0 4 28.53 18.12 3.1291 -4 2 1 4 28.55 7.26 3.1267 4 0 2 2 29.13 1.23 3.0651 -1 1 3 4 29.14 9.26 3.0648 5 1 1 4 29.14 57.94 3.0640 2 2 2 4 29.36 2.86 3.0421 1 3 0 4 29.94 5.81 2.9847 6 0 0 2 30.17 33.74 2.9625 1 1 3 4 30.91 1.98 2.8925 -5 1 2 4 30.97 3.43 2.8879 1 3 1 4 31.49 10.17 2.8411 -3 1 3 4 32.14 8.00 2.7849 -4 2 2 4 32.66 5.14 2.7420 3 3 0 4 33.49 7.24 2.6758 -6 0 2 2 33.51 15.89 2.6740 -3 3 1 4 33.78 12.92 2.6532 0 2 3 4 34.08 7.45 2.6306 5 1 2 4 34.31 2.07 2.6137 3 1 3 4 34.39 1.16 2.6080 -2 2 3 4 34.43 12.71 2.6051 3 3 1 4 34.50 3.27 2.5997 -1 3 2 4 34.62 1.07 2.5912 4 2 2 4 36.15 8.33 2.4846 -6 2 1 4 36.16 1.79 2.4844 2 2 3 4 36.65 2.91 2.4522 -7 1 1 4 37.02 11.53 2.4280 0 0 4 2 37.03 1.49 2.4278 6 0 2 2 37.30 3.88 2.4105 -2 0 4 2 37.85 6.58 2.3770 6 2 1 4 38.50 10.35 2.3383 5 3 0 4 38.50 1.34 2.3382 3 3 2 4 38.60 17.81 2.3326 7 1 1 4 38.87 1.00 2.3168 -6 2 2 4 38.90 1.75 2.3152 0 4 0 2 39.20 6.94 2.2980 -7 1 2 4 39.74 1.50 2.2683 -3 1 4 4 40.03 1.85 2.2521 0 4 1 4 40.28 6.97 2.2387 -4 0 4 2 40.29 9.80 2.2385 8 0 0 2 40.31 4.59 2.2376 -1 3 3 4 40.73 2.11 2.2153 5 1 3 4 41.08 1.58 2.1973 -2 4 1 4 41.09 3.37 2.1968 1 3 3 4 41.59 4.02 2.1712 2 4 1 4 41.66 1.06 2.1678 -5 3 2 4 42.02 4.70 2.1503 0 2 4 4 42.11 2.03 2.1459 -3 3 3 4 42.83 3.35 2.1113 3 1 4 4 43.75 5.56 2.0689 -7 1 3 4 44.03 6.36 2.0565 4 4 0 4 44.16 1.15 2.0507 5 3 2 4 44.33 4.44 2.0433 4 0 4 2 44.35 4.37 2.0427 3 3 3 4 44.58 1.72 2.0326 -4 4 1 4 44.98 5.05 2.0155 -4 2 4 4 45.00 1.43 2.0144 2 4 2 4 46.08 5.05 1.9698 7 3 0 4 46.25 2.02 1.9628 -5 3 3 4 46.93 1.89 1.9360 8 2 1 4 47.56 1.67 1.9119 -1 1 5 4 48.53 2.50 1.8760 -9 1 2 4 48.78 1.00 1.8668 -2 4 3 4 48.95 1.51 1.8607 4 4 2 4 49.69 1.22 1.8348 5 3 3 4 49.85 2.29 1.8294 6 4 0 4 50.30 1.98 1.8138 -1 5 1 4 50.53 2.71 1.8064 1 5 1 4 50.71 3.51 1.8001 8 2 2 4 51.50 5.74 1.7744 3 3 4 4 51.67 2.30 1.7690 3 5 0 4 52.01 2.43 1.7582 3 1 5 4 52.22 2.14 1.7517 -9 1 3 4 52.25 1.00 1.7508 -6 4 2 4 52.36 6.67 1.7473 -5 3 4 4 52.50 2.00 1.7429 -8 0 4 2 53.13 1.08 1.7237 -4 2 5 4 53.38 2.64 1.7162 1 5 2 4 54.00 2.79 1.6980 4 4 3 4 54.64 4.95 1.6796 -3 5 2 4 54.79 6.52 1.6756 0 4 4 4 54.79 2.35 1.6755 6 4 2 4 54.84 9.48 1.6740 -9 3 1 4 54.90 1.46 1.6725 9 3 0 4 54.97 1.28 1.6703 10 2 0 4 56.07 5.29 1.6402 -6 4 3 4 56.41 3.58 1.6311 -10 2 2 4 56.54 2.51 1.6278 -9 3 2 4 56.68 4.71 1.6241 -2 0 6 2 56.69 6.02 1.6236 1 3 5 4 56.70 1.09 1.6236 9 3 1 4 56.70 3.35 1.6235 7 3 3 4 56.87 3.31 1.6189 10 2 1 4 57.23 1.98 1.6098 5 1 5 4 57.26 4.30 1.6090 -1 5 3 4 57.26 2.78 1.6089 5 5 1 4 57.27 1.57 1.6086 -6 2 5 4 57.28 2.04 1.6084 4 2 5 4 57.47 2.11 1.6036 -9 1 4 4 58.68 5.25 1.5734 1 1 6 4 59.09 1.61 1.5633 8 0 4 2 59.69 4.13 1.5491 -5 3 5 4 59.69 1.29 1.5491 6 4 3 4 59.70 2.18 1.5490 3 3 5 4 59.93 1.05 1.5435 0 6 0 2 60.29 3.74 1.5351 5 5 2 4 60.40 2.81 1.5325 -2 2 6 4 60.41 7.67 1.5324 10 2 2 4 60.60 1.92 1.5280 0 2 6 4 60.76 3.05 1.5244 0 6 1 4 60.91 1.76 1.5211 2 6 0 4 61.39 2.19 1.5102 -6 4 4 4 61.75 1.57 1.5022 -11 1 3 4 61.84 1.56 1.5003 7 5 0 4 62.14 1.76 1.4937 -4 2 6 4 62.21 6.71 1.4924 12 0 0 2 62.40 3.16 1.4881 -2 4 5 4 62.72 2.86 1.4813 2 2 6 4 63.23 2.78 1.4707 7 3 4 4 63.75 2.86 1.4599 -7 5 2 4 63.75 1.66 1.4598 1 5 4 4 64.04 4.17 1.4540 -9 1 5 4 64.31 1.50 1.4486 2 4 5 4 64.50 1.94 1.4448 -11 3 1 4 64.73 1.56 1.4402 -9 3 4 4 65.59 2.11 1.4233 -7 1 6 4 65.80 1.36 1.4192 -10 4 1 4 65.94 1.97 1.4165 10 4 0 4 65.95 1.70 1.4165 6 4 4 4 66.38 1.98 1.4083 7 5 2 4 68.39 1.17 1.3718 10 0 4 2 68.43 2.55 1.3710 6 6 0 4 69.46 1.02 1.3532 -12 2 3 4 70.93 1.89 1.3286 7 3 5 4 71.91 1.19 1.3130 4 6 3 4 72.29 2.00 1.3070 3 1 7 4 72.36 2.23 1.3060 1 7 1 4 73.29 1.01 1.2917 3 7 0 4 76.28 1.58 1.2483 -8 6 2 4 77.50 1.20 1.2316 4 6 4 4 77.92 1.67 1.2261 -14 2 2 4 77.98 1.19 1.2253 -1 7 3 4 78.16 1.50 1.2229 -9 5 4 4 78.85 1.55 1.2139 12 0 4 2 79.49 1.46 1.2058 8 2 6 4 82.75 1.03 1.1663 14 2 2 4 83.44 1.09 1.1584 -12 4 4 4 86.41 1.91 1.1261 5 5 6 4 88.21 1.09 1.1076 10 2 6 4 88.95 1.18 1.1004 10 4 5 4 ================================================================================ XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.