1. Opportunity's instrument also detected jarosite , an iron sulfate mineral. 2. In 2004, " Opportunity " detected the mineral jarosite . 3. Jarosite Rd / Bells Beach Rd provides access to the Bells Beach carparks.4. The mineral called jarosite which only forms in water was found in all bedrocks. 5. The alunite-jarosite found in the smectite rind would have a similar origin. 6. Discovery of an iron sulfate mineral called jarosite adds to the evidence, said Squyres. 7. The alunite supergroup includes the alunite, jarosite , beudantite, crandallite and florencite subgroups. 8. The minerals are actinolite, montmorillonite, saponite, jarosite , halloysite, szomolnokite and magnesite. 9. Hydroniumjarosite will only form from alkali-deficient solutions, as alkali-rich jarosite forms preferentially. 10. For example, the sulfate mineral jarosite forms only in low pH ( highly acidic ) water.
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