Romarchite Diffraction data computed using the structure from the paper listed below, along with the cell parameters refined from the powder pattern for R080006 Izumi F Journal of Solid State Chemistry 38 (1981) 381-385 Pattern-fitting structure refinement of tin(II) oxide Locality: synthetic CELL PARAMETERS: 3.825647 3.825647 4.879374 90.00000 90.00000 90.00000 SPACE GROUP: P4/nmm ATOM X Y Z OCCUPANCY ISO(B) Sn 0.50000 0.00000 0.23690 1.000 0.660 O 0.00000 0.00000 0.00000 1.000 2.600 X-RAY WAVELENGTH: 0.710730 BOUNDS ON TWO THETA: 5.0 60.0 LIMITS IMPOSED ON THE INDICES ARE: +/- 5 +/- 5 +/- 6 MAX. ABS. INTENSITY / VOLUME**2: 1551.825061 The INTENSITY cut off value is 1.00 2-THETA INTENSITY D-SPACING H K L 8.51 4.51 4.8794 0 0 1 13.71 100.00 3.0106 1 0 1 15.24 28.55 2.7051 1 1 0 16.89 10.56 2.4397 0 0 2 21.55 17.38 1.9128 2 0 0 22.75 28.38 1.8117 1 1 2 25.56 32.63 1.6145 2 1 1 27.43 10.42 1.5053 2 0 2 27.59 11.92 1.4968 1 0 3 29.66 1.05 1.3939 1 1 3 30.58 5.16 1.3526 2 2 0 33.59 6.23 1.2338 3 0 1 33.98 1.55 1.2198 0 0 4 34.27 5.02 1.2098 3 1 0 35.07 4.48 1.1829 2 2 2 35.19 9.85 1.1788 2 1 3 37.37 3.23 1.1120 1 1 4 38.38 8.18 1.0838 3 1 2 40.18 6.15 1.0368 3 2 1 40.52 3.00 1.0285 2 0 4 41.57 2.53 1.0035 3 0 3 43.71 1.20 0.9564 4 0 0 44.23 1.73 0.9456 1 0 5 45.97 3.48 0.9115 4 1 1 46.27 1.68 0.9059 2 2 4 47.12 1.39 0.8904 4 0 2 47.22 2.93 0.8887 3 2 3 48.95 2.17 0.8590 3 1 4 49.16 1.42 0.8554 4 2 0 49.64 2.10 0.8477 2 1 5 49.76 1.31 0.8458 3 3 2 52.30 1.78 0.8073 4 2 2 52.39 1.85 0.8059 4 1 3 56.14 1.43 0.7559 4 3 1 59.45 1.14 0.7171 5 1 2 59.45 1.14 0.7171 5 1 2 XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.