Formula: K Al3 S2 O14 H6
Name: Alunite
Unit cell: 7.02 7.02 17.223 90.0 90.0 120.0 , V=735.04
Space group: R-3M (166)

Menchetti S , Sabelli C , Neues Jahrbuch fur Mineralogie, Monatshefte , 1976 (1976) p.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