jarosite


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jarosite

(ˈdʒærəˌsaɪt)
n
(Minerals) a yellow to brown secondary mineral consisting of basic hydrated sulphate of iron and potassium in masses or hexagonal crystals. Formula: KFe3(SO4)2(OH)6
[C19: from Barranco Jaroso, in Almeria, Spain + -ite1]
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References in periodicals archive ?
Unlike schwertmannite, the [S.sub.NAS] calculated for jarosite accounted for ~50% of the added natural jarosite recovery and slightly more for the recovery of the synthetic jarosite (Fig.
The desert terrain of Rio Tinto, a former mining area in the Huelva district of Andalusia, contains a mineral called jarosite, just like Mars, according to experts.
This soil horizon has considerable clay content, although it is quite easy to handle due to a high proportion of jarosite mottles, small pebbles, and decomposed plant roots.
No Jarosite [+ or -] Periclase [+ or -] E_27 1.0 0.37 E_34 E_28 E_25 0.6 0.31 E_26 E_22 E_24 E_23 E_55 E_48 E_53 E_51 E_54 E_50 E_49 E_52 E_56 E_16 2.3 0.41 1.0 0.5 E_17 E_18 E_19 E_20 E_21 E_45 E_42 E_43 E_46 E_47 E_44 E_36 E_35 E_39 E_38 E_32 E_37 E_29 E_30 E_40 E_41 E_31
Drill chips of the gossan cap show silicified volcanics, multiple quartz veins, and pockets of solid, multicolored limonites, including hematite, goethite, and jarosite. The lead and precious metal values are suspected to come primarily from plumbojarosite.
These include the iron oxides, haematite and goethite; the sulphates jarosite, alunite and gypsum; clay minerals such as montmorillonite and kaolinite; phyllosilicates such as muscovite and illite; as well as pyrophyllite, chlorite, biotite, phlogopite, talc, carbonates, amphiboles, epidote, topaz, opaline silica and antigorite.
The depths of soils selected depended on field observations of the presence of pyrite bands, jarosite, and shell material.
In many cases, the water not only remained liquid at extremely low temperatures, but precipitated minerals as it got colder, including jarosite, haematite and gypsum, which are all present on Mars today.
Associated phases were bayldonite, duftite, gartrellite, agardite, mimetite and various arsenic-bearing members of the jarosite supergroup.