Vishnevite
Della Ventura G, Bellatreccia F, Parodi G C, Camara F, Piccinini M
American Mineralogist 92 (2007) 713-721
Single-crystal FTIR and X-ray study of vishnevite, ideally
[Na6(SO4)][Na2(H2O)2](Si6Al6O24)
Locality: Latium, Italy
Sample: Pi4
_database_code_amcsd 0004320
12.7228 12.7228 5.1980 90 90 120 P6_3
atom     x     y     z occ Uiso U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3)
Na1    2/3   1/3 .1333 .83 .034   .019   .019   .064   .010      0      0
Na2  .1141 .2258 .2940 .35 .024   .017   .039   .023   .020  -.004  -.005
K    .1458 .2894 .2893 .43 .042   .038   .065   .032   .034  -.003  -.006
Al   .3384 .4144 .7570     .009   .009   .010   .008   .006   .000   .001
Si   .0834 .4134 .7562     .008   .008   .009   .008   .005   .000   .001
S        0     0 .2918 .29 .045   .040   .040   .057   .020      0      0
O1   .2019 .4044 .6799     .017   .010   .026   .018   .011   .002   .000
O2   .1192 .5535 .7332     .023   .022   .014   .035   .011   .006   .004
O3   .0386 .3599 .0419     .018   .014   .027   .011   .011   .002   .004
O4   .3279 .3527 .0597     .017   .021   .024   .011   .015  -.001   .005
O51  .0615 .1133 .6725 .22 .150
O52  .0496 .1090 .9541 .25 .139
O6   .6184 .3043 .6893 .33 .062
O7       0     0 .0737 .22 .068