Alunite
Menchetti S, Sabelli C
Neues Jahrbuch fur Mineralogie, Monatshefte 1976 (1976) 406-417
Crystal chemistry of the alunite series: crystal structure refinement of alunite
and synthetic jarosite
Note: none of the reported bond lengths can be reproduced
Locality: Montioni, Toscana, Italy
_database_code_amcsd 0014755
7.020 7.020 17.223 90 90 120 R-3m
atom      x       y       z Biso B(1,1) B(2,2) B(3,3) B(1,2)  B(1,3)  B(2,3)
K         0       0       0  .97 .00742 .00742 .00061 .00371       0       0
Al        0      .5      .5  .38 .00181 .00228 .00043 .00091 -.00005 -.00002
S         0       0  .30290  .47 .00328 .00328 .00037 .00164       0       0
O1        0       0  .38715  .70 .00599 .00599 .00029 .00299       0       0
O2   .21788 -.21788 -.05998  .60 .00525 .00525 .00045 .00406 -.00011  .00011
Oh   .12587 -.12587  .14256  .55 .00273 .00273 .00065 .00106  .00023 -.00023
H      .174   -.174    .120 1.34