Bechererite
Giester G, Rieck B
American Mineralogist 81 (1996) 244-248
Bechererite, (Zn,Cu)6Zn2(OH)13[(S,Si)(O,OH)4]2, a novel mineral species from the
Tonopah-Belmont mine, Arizonia
Note: U(1,2) changed for Si, S, O1, OH1 to match symmetry constraints.
_database_code_amcsd 0001776
8.319 8.319 7.377 90 90 120 P-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)
Zn1  .4199 .2853 -.0005 .823        .019   .014   .027   .009  -.002      0
Cu1  .4199 .2853 -.0005 .167        .019   .014   .027   .009  -.002      0
Zn2      0     0  .2447             .020   .020   .019   .010      0      0
Si     1/3   2/3  .4039   .5        .035   .035   .033  .0175      0      0
S      1/3   2/3  .4039   .5        .035   .035   .033  .0175      0      0
H1     .35   .39    .48       .48
H2     .23   .32    .26       .26
H3     .45   .10    .24       .24
O1     1/3   2/3   .186             .033   .033   .042  .0165      0      0
O2    .328  .489   .478             .065   .029   .029   .034  -.003  -.001
OH1      0     0     .5             .149   .149   .008  .0745      0      0
Oh2   .189  .244   .164             .025   .030   .018   .012  -.004  -.007
Oh3   .478  .104   .124             .021   .015   .022   .005   .005   .001