Crystal System: Monoclinic
Status of Occurrence: Confirmed Occurrence - 1st UK recording
Chemical Composition: Hydrated iron sulphate
Chemical Formula: FeSO4.4H2O
Method(s) of Verification: Parys Mountain - XRD (D.A. Jenkins, University of Wales, Bangor).
- Supergene: post-mining oxidation & weathering deposits
Introduction: rozenite typically forms as a supergene product of pyrite decay and as such is often associated with a wide range of iron sulphates such as jarosite and melanterite.
Occurrence in Wales: the only known occurrence in the UK is as a post-mining mineral at Parys Mountain on Anglesey (Jenkins et al., 2000). White to yellowish post-mining sulphate efflorescences are, however, widespread in Wales, and it may be the case that there are other occurrences as these have in the main received little detailed study.
- Parys Mountain, Anglesey: noted, but without detailed description, as being part of the post-mining suite of supergene minerals at this site (Jenkins et al., 2000).
- Jenkins, D. A., Johnson, D. B. & Freeman, C., 2000. Mynydd Parys Cu-Pb-Zn mines: mineralogy, microbiology and acid mine drainage. pp. 161-179. In: Environmental Mineralogy: Microbial Interactions, Anthropogenic Influences, Contaminated Land and Waste Management (Cotter-Howells, J. D., Campbell, L. S., Valasami-Jones, E. & Batchelder, M., eds.). The Mineralogical Society of Great Britain & Ireland, London.