Grandaite Camara F, Ciriotti M E, Bittarello E, Nestola F, Massimi F, Radica F, Costa E, Benna P, Piccoli G C Mineralogical Magazine 78 (2014) 757-774 Arsenic-bearing new mineral species from Valletta mine, Maira Valley, Piedmont, Italy: I. Grandaite, Sr2Al(AsO4)2(OH), description and crystal structure Locality: Valletta mine, Maira Valley, Piedmont, Italy _database_code_amcsd 0020474 CELL PARAMETERS: 7.5764 5.9507 8.8050 90.000 112.551 90.000 SPACE GROUP: P2_1/m X-RAY WAVELENGTH: 1.541838 Cell Volume: 366.619 Density (g/cm3): 4.374 MAX. ABS. INTENSITY / VOLUME**2: 38.95710128 RIR: 2.900 RIR based on corundum from Acta Crystallographica A38 (1982) 733-739 2-THETA INTENSITY D-SPACING H K L Multiplicity 10.88 4.70 8.1318 0 0 1 2 13.15 2.96 6.7317 -1 0 1 2 18.48 3.81 4.8022 0 1 1 4 19.58 3.40 4.5331 1 1 0 4 19.91 3.05 4.4584 -1 1 1 4 21.86 4.09 4.0659 0 0 2 2 24.75 12.39 3.5975 1 1 1 4 25.46 6.24 3.4985 2 0 0 2 25.54 3.91 3.4880 -1 1 2 4 26.55 6.77 3.3571 0 1 2 4 27.95 100.00 3.1927 -2 1 1 4 29.33 1.90 3.0446 1 0 2 2 30.03 41.29 2.9753 0 2 0 2 30.46 41.22 2.9350 -1 0 3 2 30.51 11.84 2.9297 -2 1 2 4 31.48 7.81 2.8423 2 0 1 2 32.03 9.14 2.7942 0 2 1 4 32.71 3.58 2.7381 1 2 0 4 32.91 3.22 2.7214 -1 2 1 4 33.05 1.69 2.7106 0 0 3 2 33.05 61.81 2.7105 1 1 2 4 34.06 1.98 2.6322 -1 1 3 4 34.99 9.71 2.5647 2 1 1 4 36.15 10.83 2.4846 1 2 1 4 36.52 9.06 2.4606 -2 1 3 4 36.72 3.29 2.4477 -1 2 2 4 38.60 4.03 2.3324 3 0 0 2 38.92 1.32 2.3140 -3 1 1 4 39.77 5.31 2.2665 2 2 0 4 41.97 6.02 2.1525 -2 0 4 2 43.30 28.79 2.0895 -1 2 3 4 44.32 8.76 2.0438 3 0 1 2 45.33 2.99 2.0005 -2 2 3 4 48.10 11.33 1.8917 -4 0 2 2 49.26 16.07 1.8497 -3 1 4 4 49.84 1.23 1.8298 2 0 3 2 50.06 4.49 1.8223 -4 0 3 2 50.24 1.90 1.8161 1 3 1 4 51.24 1.16 1.7827 0 3 2 4 51.39 1.39 1.7780 1 0 4 2 51.83 2.73 1.7638 -1 2 4 4 52.06 13.17 1.7568 -2 3 1 4 52.30 3.15 1.7493 4 0 0 2 52.31 1.24 1.7489 2 1 3 4 53.63 2.07 1.7089 -2 3 2 4 53.81 4.81 1.7036 1 1 4 4 54.47 20.59 1.6847 3 2 1 4 54.53 2.09 1.6829 -4 0 4 2 54.68 2.17 1.6785 0 2 4 4 54.69 1.43 1.6783 4 1 0 4 55.05 1.41 1.6682 -1 1 5 4 55.27 13.26 1.6620 1 3 2 4 56.50 1.28 1.6287 -3 2 4 4 56.58 1.20 1.6266 2 3 1 4 57.39 2.67 1.6055 -3 1 5 4 57.65 1.29 1.5991 -2 3 3 4 57.75 9.95 1.5964 -4 2 2 4 58.87 3.95 1.5688 0 1 5 4 59.48 1.36 1.5540 -4 2 3 4 60.85 1.74 1.5223 2 0 4 2 61.61 1.87 1.5054 3 0 3 2 61.82 6.57 1.5007 -1 2 5 4 62.42 9.78 1.4877 0 4 0 2 63.38 3.43 1.4675 -2 0 6 2 63.77 1.04 1.4594 3 1 3 4 65.06 2.58 1.4336 -5 1 1 4 67.09 2.46 1.3950 -3 1 6 4 67.41 6.00 1.3892 -3 3 4 4 68.93 4.79 1.3623 5 1 0 4 69.34 5.80 1.3552 2 2 4 4 69.86 1.32 1.3463 -5 0 5 2 70.05 2.47 1.3433 3 2 3 4 71.04 5.85 1.3269 -1 4 3 4 71.22 2.26 1.3240 1 3 4 4 71.59 1.04 1.3180 2 4 1 4 71.71 3.01 1.3161 -2 2 6 4 71.82 1.68 1.3144 1 2 5 4 74.31 1.08 1.2763 -3 3 5 4 75.61 1.90 1.2577 0 3 5 4 75.85 1.07 1.2543 3 4 0 4 77.06 2.37 1.2376 4 1 3 4 77.35 4.01 1.2337 -6 1 3 4 77.88 4.90 1.2266 -5 2 5 4 78.09 1.04 1.2238 -2 4 4 4 79.08 2.27 1.2109 -6 1 4 4 79.72 2.43 1.2028 3 4 1 4 81.19 1.29 1.1847 -5 3 1 4 81.61 1.45 1.1797 -4 1 7 4 82.49 3.22 1.1694 -4 4 2 4 83.07 1.41 1.1627 -3 3 6 4 83.97 1.52 1.1524 -4 4 3 4 84.78 2.56 1.1435 5 3 0 4 85.09 2.77 1.1402 0 1 7 4 85.54 3.39 1.1353 -2 5 1 4 86.36 1.49 1.1266 2 0 6 2 88.13 2.39 1.1085 1 5 2 4 ================================================================================ XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.