Figures 4D and 4E after Corkhill.
US Geological Survey Professional Paper 1693 Craig JR, Vaughan DJ (1990) Compositional and textural variations of the major iron and base-metal suphide minerals.
As part of their metabolic processes, these organisms reduce sulfate ions to sulfide which can react with any available dissolved metal ions to form highly insoluble sulfides.Certain sulfides also exhibit non-stoichiometry (deviation of the formula from an integral ratio).The cathodic reaction is probably the rate-determining step.Nasa Website Japan says Hayabusa brought back asteroid grains.Fe-rich olivine is relatively much less common, but it occurs in igneous rocks in small amounts in rare granites and rhyolites, and extremely Fe-rich olivine can exist stably with quartz and tridymite.Meteoritics and Planetary Science.
Mineralogical Society of America Short Course Notes, Volume.
It is a common mineral in Earth's subsurface but weathers quickly on the surface.10 Extraterrestrial occurrences edit Mg-rich olivine has also been discovered in meteorites, 12 on the Moon 13 and Mars, 14 15 falling into infant stars, 16 as well as on asteroid 25143 Itokawa.It is rare and found on dry olivine ridges in the fjord districts of Sunnmøre and Nordfjord.New York: John Wiley Sons.Wiley-Interscience, New York, pp 367-434 casino reviews nz Xu J and 7 coauthors (2016) Highly defective nanocrystals of zinc sulfide produced via dissimilatory bacterial sulfate reduction: a comparative study with abiogenic analogues.Oversikt over bergartene i Sunnmøre og tilgrensende deler av Nordfjord Archived at the Wayback Machine.Oxidative leaching of arsenopyrite in the presence of common acid mine drainage bacteria (e.g.A projection of the unit cell is shown by the black rectangle.Retrieved Pretty Green Mineral.

Elements 13: 119-124 Rickard DT, Morse JW (2005) Acid volatile sulfide (AVS).