Mookherjee M, Redfern S A T, Swainson I, Harlov D E
Physics and Chemistry of Minerals 31 (2004) 643-649
Low-temperature behaviour of ammonium ion in buddingtonite
[N(D/H)4AlSi3O8] from neutron powder diffraction
Sample: T = 11 K
_database_code_amcsd 0008919
8.79182 13.11084 7.20473 90 116.097 90 C2/m
atom x y z occ Uiso
N .2903 0 .1424 .01452
D1 .4147 .0190 .2066 .5 .03999
D2 .2614 -.0311 .2518 .5 .03999
D3 .2659 -.0513 .0275 .5 .03999
D4 .2191 .0634 .0838 .5 .03999
Al1 .7070 .1179 .3447 .25 .00056
Si1 .7070 .1179 .3447 .75 .00056
Al2 .0167 .1881 .2347 .25 .00243
Si2 .0167 .1881 .2347 .75 .00243
O1 0 .1580 0 -.00506
O2 .6607 0 .2950 -.00506
O3 .8274 .1587 .2252 -.00506
O4 .0399 .3123 .2624 -.00506
O5 .1713 .1260 .4071 -.00506
Sample: T = 210 K
_database_code_amcsd 0008920
8.81611 13.09609 7.20155 90 116.121 90 C2/m
N .2949 0 .1473 .02367
D1 .4155 .0198 .2159 .5 .07414
D2 .2629 -.0317 .2497 .5 .07414
D3 .2765 -.0495 .0354 .5 .07414
D4 .2247 .0614 .0879 .5 .07414
Al1 .7062 .1176 .3456 .25 -.00168
Si1 .7062 .1176 .3456 .75 -.00168
Al2 .0213 .1931 .2373 .25 .00965
Si2 .0213 .1931 .2373 .75 .00965
O1 0 .1584 0 -.00129
O2 .6625 0 .2928 -.00129
O3 .8267 .1583 .2245 -.00129
O4 .0419 .3120 .2631 -.00129
O5 .1695 .1264 .4086 -.00129
Sample: T = 280 K
_database_code_amcsd 0008921
8.83157 13.08541 7.20024 90 116.147 90 C2/m
N .2955 0 .1486 .03027
D1 .4170 .0200 .2186 .5 .09924
D2 .2647 -.0360 .2492 .5 .09924
D3 .2762 -.0465 .0303 .5 .09924
D4 .2244 .0625 .0961 .5 .09924
Al1 .7065 .1192 .3474 .25 .01270
Si1 .7065 .1192 .3474 .75 .01270
Al2 .0222 .1936 .2365 .25 .01079
Si2 .0222 .1936 .2365 .75 .01079
O1 0 .1584 0 .00317
O2 .6652 0 .2898 .00317
O3 .8265 .1580 .2236 .00317
O4 .0418 .3123 .2631 .00317
O5 .1697 .1270 .4096 .00317
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