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Cosmochemist discovers potential solution to meteorite mystery

By Guest PostJuly 11, 2013Sciencealexei fedkin, british mineralogist, carnegie institution, chondrules, cosmochemist, crystal structures, discover, early solar system, forming jupiter, fred ciesla, gaseous magnesium, henry sorby, high pressure collisions, iron oxide, jay melosh, lawrence grossman, magnesium silicates, meteorite mystery, mystery in cosmochemistry, olivine, oxide bearing olivine, planets, potential solution, primordial gas cloud, silicates, solar nebula, steven simon, sun, university of chicago, Washington

Chondrules may have formed from high-pressure collisions in early solar system

A normally staid University of Chicago scientist has stunned many of his colleagues with his radical solution to a 135-year-old mystery in cosmochemistry. “I’m a fairly sober guy. People didn’t know what to think all of a sudden,” said Lawrence Grossman, professor in geophysical sciences.

At issue is how numerous small, glassy spherules had become embedded within specimens of the largest class of meteorites—the chondrites. British mineralogist Henry Sorby first described these spherules, called chondrules, in 1877. Sorby suggested that they might be “droplets of fiery rain” which somehow condensed out of the cloud of gas and dust that formed the solar system 4.5 billion years ago. (more…)

Rust Never Sleeps

By Guest PostSeptember 7, 2012Scienceconductor of electricity, iron oxide, pump probe spectroscopy, rust, rusted battery, solar energy collection, solar energy devices, uranium in groundwater

Berkeley Lab-led Observations of Electron Hopping in Iron Oxide Hold Consequences for Environment and Energy

Rust – iron oxide – is a poor conductor of electricity, which is why an electronic device with a rusted battery usually won’t work. Despite this poor conductivity, an electron transferred to a particle of rust will use thermal energy to continually move or “hop” from one atom of iron to the next. Electron mobility in iron oxide can hold huge significance for a broad range of environment- and energy-related reactions, including reactions pertaining to uranium in groundwater and reactions pertaining to low-cost solar energy devices. (more…)

Badwater Basin: Death Valley Microbe Thrives There

By Guest PostDecember 30, 2011Sciencebadwater basin, basin, bw 1, chemistry of the environment, christopher lefevre, david pignol, death valley national park, dennis bazylinski, enriqueta barrera, greigite, greigite producing bacterium, iron oxide, magnetic bacteria, magnetic properties, magnetite, magnetite producing bacteria, microbial magnetism, minerals, nano sized crystals, nanotech, national science foundation, nevada, nicolas menguy of pierre, novel biotech, precious metals, silver state, sulfate reducing bacteria, university of aix marseille, university of nevada las vegas, unlv

*Discovery may lead to novel biotech and nanotech uses*

Nevada, the “Silver State,” is well-known for mining precious metals.

But scientists Dennis Bazylinski and colleagues at the University of Nevada Las Vegas (UNLV) do a different type of mining.

They sluice through every water body they can find, looking for new forms of microbial magnetism.

In a basin named Badwater on the edge of Death Valley National Park, Bazylinski and researcher Christopher Lefèvre hit pay dirt. (more…)

Tag Archives: iron oxide

Cosmochemist discovers potential solution to meteorite mystery

Rust Never Sleeps

Badwater Basin: Death Valley Microbe Thrives There