Armstrongite Mesto E, Kaneva E, Schingaro E, Vladykin N, Lacalamita M, Scordari F American Mineralogist 99 (2014) 2424-2432 Armstrongite from Khan Bogdo (Mongolia): Crystal structure determination and implications for zeolite-like cation exchange properties Locality: Khan Bogdo deposit, southern Gobi Desert, Gobi, Mongolia _database_code_amcsd 0020417 14.0178 14.1289 7.8366 90 109.436 90 C2/m atom x y z occ Uiso U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3) Ca1 .25436 .5 .04824 .96 .0200 .0296 .0108 .0251 0 .0163 0 Ce1 .25436 .5 .04824 .01 .0200 .0296 .0108 .0251 0 .0163 0 Yb1 .25436 .5 .04824 .01 .0200 .0296 .0108 .0251 0 .0163 0 Zr1 .25 .25 0 .99 .0102 .01089 .00812 .01256 -.00063 .00502 -.00104 Si1 .18699 .61399 .33903 .0128 .0145 .0099 .0148 .0014 .0061 .0020 Si2 .34112 .61018 .73110 .0122 .0153 .0081 .0148 -.0006 .0072 -.0011 Si3 .00363 .74257 .30239 .0129 .0115 .0114 .0164 .0006 .0055 .0001 O1 0 .7679 .5 .0287 .0368 .035 .0189 0 .0150 0 O2 .2598 .63983 .5392 .0237 .0310 .0219 .0153 -.0004 .0037 .0011 O3 .29672 .62811 .8916 .0166 .0207 .0136 .0185 -.0002 .0105 .0006 O4 .22858 .65291 .1858 .0183 .0255 .0147 .0181 .0027 .0116 .0004 O5 .1824 .5 .3095 .0206 .0232 .0106 .0299 0 .0113 0 O6 .3703 .5 .7273 .0216 .0298 .0093 .0310 0 .0170 0 O7 .44478 .66733 .7598 .0220 .0219 .0177 .0278 .0012 .0103 -.0077 O8 .07373 .64942 .3147 .0250 .0201 .0189 .0380 .0042 .0123 .0076 O9 -.10488 .72320 .1627 .0224 .0139 .0229 .0264 -.0001 .0012 -.00021 O10 .0883 .5 -.1431 .0641 .042 .035 .091 0 -.010 0 O11 .4154 .5 .2651 .0577 .024 .041 .099 0 .009 0 H101 .0461 .5489 -.1675 .0951 H111 .4565 .4508 .2833 .0836