Natrolite Stuckenschmidt E, Joswig W, Baur W H Physics and Chemistry of Minerals 19 (1993) 562-570 Natrolite, Part I: refinement of high-order data, separation of internal and external vibrational amplitudes from displacement parameters _database_code_amcsd 0007751 18.2929 18.6407 6.5871 90 90 90 Fdd2 atom x y z occ Uiso U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3) Si1 0 0 0 .993 .00668 .00791 .00776 .00438 .00026 .00000 .00000 Si2 .15323 .21135 .62273 .986 .00579 .00508 .00608 .00620 -.00060 -.00032 -.00043 Al .03739 .09374 .61525 .993 .00608 .00660 .00523 .00643 -.00039 -.00031 -.00032 O1 .02269 .06853 .86619 1.015 .01442 .02149 .01220 .00957 -.00240 .00159 .00328 O2 .07010 .18183 .60974 1.013 .00860 .00661 .00712 .01209 -.00147 -.00071 .00001 O3 .09850 .03512 .50019 1.014 .01318 .01203 .01017 .01735 .00224 .00034 -.00632 O4 .20637 .15267 .72579 1.020 .01303 .01049 .01183 .01678 .00227 -.00555 .00081 O5 .18035 .22733 .39022 1.013 .01482 .01287 .02195 .00964 -.00283 .00394 .00214 Na .22074 .03077 .61761 .991 .01671 .01581 .01594 .01839 -.00152 -.00284 -.00189 Ow .05648 .18951 .11087 1.001 .02218 .0249 .0225 .0192 .00183 -.0005 -.0013 H1 .0520 .1440 .057 .055 H2 .1010 .1883 .161 .055