Tschernichite Alberti A, Cruciani G, Galli E, Merlino S, Millini R, Quartieri S, Vezzalini G, Zanardi S Journal of Physical Chemistry B106 (2002) 10277-10284 Crystal structure of tetragonal and monoclinic polytypes of tschernichite, the natural counterpart of synthetic zeolite beta Locality: Mt. Adamson, Northern Victoria Land, Antarctica Sample: small crystal, tetragonal Note: Mg position adjusted to match reported bond lengths _database_code_amcsd 0013154 12.634 12.634 26.608 90 90 90 P4_122 atom x y z occ Uiso Na -.291 -.300 .123 .04 .04 Mg -.291 -.300 .123 .04 .04 K1 0 -.123 0 .04 .11 Ca1 0 -.123 0 .32 .11 K2 0 .449 0 .03 .05 Ca2 0 .449 0 .25 .05 K3 -.5 -.318 0 .04 .10 Ca3 -.5 -.318 0 .32 .10 Si1 .4579 .2945 .0562 .70 .020 Al1 .4579 .2945 .0562 .30 .020 Si2 .4573 .0422 .0541 .90 .018 Al2 .4573 .0422 .0541 .10 .018 Si3 .2111 .2935 .0565 .85 .016 Al3 .2111 .2935 .0565 .15 .016 Si4 .2113 .0419 .0575 .83 .017 Al4 .2113 .0419 .0575 .17 .017 Si5 .8360 .2938 .0566 .99 .019 Al5 .8360 .2938 .0566 .01 .019 Si6 .8355 .0411 .0577 .76 .018 Al6 .8355 .0411 .0577 .24 .018 Si7 .0271 .3583 .1251 .78 .021 Al7 .0271 .3583 .1251 .22 .021 Si8 .0262 -.0262 .125 .71 .016 Al8 .0262 -.0262 .125 .29 .016 Si9 .6403 .3597 .125 .93 .019 Al9 .6403 .3597 .125 .07 .019 O1 .5 .3395 0 .023 O2 .4691 .1639 .0608 .035 O3 .3363 .3310 .0631 .039 O4 .5267 .3542 .0994 .037 O5 .5 .080 0 .030 O6 .3340 .0018 .0626 .037 O7 .5227 -.0180 .0993 .033 O8 .2017 .1679 .0661 .047 O9 .1643 .3224 .0018 .028 O10 .1468 .3539 .1004 .036 O11 .1641 .0056 .0024 .039 O12 .1458 -.0208 .0998 .033 O13 .8348 .1696 .0639 .050 O14 .9374 .3480 .0809 .036 O15 .7298 .3481 .0828 .057 O16 .7296 -.0163 .0822 .035 O17 .9412 -.0094 .0789 .050 Wat1 -.186 -.229 .057 .55 .09 Wat2 -.167 -.416 .056 .93 .22 Wat3 0 .546 0 .38 .10 Wat4 -.359 -.206 .005 .86 .19 Wat6 -.463 -.323 .090 .67 .18 Wat7 -.361 -.478 .006 .31 .11 Wat10 -.155 -.346 -.002 .30 .06 Wat11 -.334 -.334 -.125 .34 .08 Wat13 0 -.203 0 .38 .05