Hammond R P, Barbier J
Acta Crystallographica B54 (1998) 211-220
Monoclinic and hexagonal nepheline structures of (Na3/4K1/4)AlGeO4
Locality: synthetic
Note: hexagonal nepheline
_database_code_amcsd 0009903
10.1640 10.1640 8.540 90 90 120 P6_3
atom x y z occ Uiso
Na1 0 0 .9975 .12 .0436
KK1 0 0 .9975 .76 .0436
Na2 .9945 .4380 .9964 .0300
Al1 1/3 2/3 .1866 .97 .0115
Gel 1/3 2/3 .1866 .03 .0115
Al2 .0897 .3325 .6810 .97 .0130
Ge2 .0897 .3325 .6810 .03 .0130
Ge3 1/3 2/3 .8000 .0176
Ge4 .08990 .3336 .30804 .01645
O1 .2664 .6124 .9948 1/3 .027
O2 .0158 .3147 .4953 .0434
O3 .1643 .5186 .7401 .056
O4 .1639 .5181 .2510 .052
O5 .2232 .2751 .3141 .0253
O6 .2254 .2762 .6756 .0239
Note: monoclinic nepheline
_database_code_amcsd 0009904
10.0477 8.5764 10.2118 90 119.0350 90 P2_1
atom x y z Uiso
Na1 .4362 .4289 .4533 .0201
Na2 .5610 .4288 .9982 .0222
Na3 .0073 .9293 .4379 .0228
K4 .0121 .4268 .0077 .0381
All .3474 .7380 .6649 .0080
Al2 .2448 .2388 .9032 .0084
Al3 .0901 .2422 .3414 .0077
Al4 .6810 .2457 .7631 .0080
Gel .34742 .1227 .66563 .0099
Ge2 .24343 .6197 .90195 .0095
Ge3 .08980 .6157 .34079 .0097
Ge4 .68052 .6112 .76134 .0089
O1 .4846 .2334 .6492 .018
O2 .7341 .4307 .7292 .0127
O3 .7384 .2400 .9531 .017
O4 .0527 .6084 .7721 .016
O5 .7772 .1033 .7209 .017
O6 .4863 .6294 .6473 .019
O7 .3587 .1527 .8405 .018
O8 .7337 .6212 .9506 .017
O9 .0511 .2455 .7715 .016
O10 .0177 .4297 .3332 .022
Oll .3040 .4293 .9611 .023
O12 .2252 .2552 .2799 .013
O13 .1656 .6834 .5210 .020
O14 .3900 -.0675 .6502 .027
O15 .1674 .1700 .5265 .026
O16 .3565 .7026 .8363 .021
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