Results 101 to 110 of about 73,396 (320)

Mineralogy and Surface Composition of Asteroids

, 2015
Methods to constrain the surface mineralogy of asteroids have seen considerable development during the last decade with advancement in laboratory spectral calibrations and validation of our interpretive methodologies by spacecraft rendezvous missions ...
Burbine, Thomas H., Dunn, Tasha L., Moskovitz, Nicholas A., Reddy, Vishnu, Thomas, Cristina A.   +4 more
core   +1 more source

Homogenization‐confined‐repair regeneration of spent LiFePO4 cathodes via tunable pre‐oxidization and microencapsulation strategy

InfoMat, EarlyView.
The HCR‐DR method combines pre‐oxidation and NIPS to synchronize atomic defect repair with structural engineering. Pre‐oxidation converts S‐LFP into stoichiometric intermediates, eliminating residual binder and carbon. Ethanol‐induced NIPS of PVA forms porous microcapsules with confined Li2CO3/glucose around S‐LFP‐Air particles. Annealing pyrolyzes PVA
Shouyu Qu, Yangyang Liu, Gen Chen, Zeinhom M. El‐Bahy, Dalal A. Alshammari, Mohamed H. Helal, Junwei Han, Jiang Zhou   +7 more
wiley   +1 more source

The Effect of Intracrystalline Water on the Mechanical Properties of Olivine at Room Temperature

Geophysical Research Letters
The effect of small concentrations of intracrystalline water on the strength of olivine is significant at asthenospheric temperatures but is poorly constrained at lower temperatures applicable to the shallow lithosphere.
Kathryn M. Kumamoto, Lars N. Hansen, Thomas Breithaupt, David Wallis, Bo‐Shiuan Li, David E. J. Armstrong, David L. Goldsby, Yang (Will) Li, Jessica M. Warren, Angus J. Wilkinson   +9 more
doaj   +1 more source

Geoengineering impact of open ocean dissolution of olivine on atmospheric CO2, surface ocean pH and marine biology

Environmental Research Letters, 2013
Ongoing global warming induced by anthropogenic emissions has opened the debate as to whether geoengineering is a ‘quick fix’ option. Here we analyse the intended and unintended effects of one specific geoengineering approach, which is enhanced ...
Peter Köhler, Jesse F Abrams, Christoph Völker, Judith Hauck, Dieter A Wolf-Gladrow   +4 more
doaj   +1 more source

Current Practices for Analyzing Soils and Sediments via Mössbauer Spectroscopy

Journal of Plant Nutrition and Soil Science, EarlyView.
ABSTRACT Environmental scientists are increasingly returning to Mössbauer spectroscopy (MBS) to reveal details about iron (Fe)‐bearing phases in soils and sediments. MBS is particularly powerful at distinguishing between Fe(II) and Fe(III) and, given appropriate background information, can offer exceptionally precise information on Fe speciation in ...
Aaron Thompson, James M. Byrne, Carolin L. Dreher, Andrew R. C. Grigg, Prachi Joshi, Drew E. Latta, Anke Neumann, Luiza Notini, Katie E. B. O'Neill, Katherine A. Rothwell   +9 more
wiley   +1 more source

The 10 micron spectral structure in comets [PDF]

The 10 micron spectra of comets Halley (1982i), Wilson (1986l), Kohoutek (1973f) and Bradfield (1987s) are presented and compared. The silicate emission profiles of Halley and Bradfield are seen to be remarkably similar in that both contain a sharp break
Campins, Humberto, Lynch, David K., Russell, Ray W.   +2 more
core   +1 more source

Improving the Raman Model for Dravite and Schorl Tourmalines by μXANES Analysis of Iron Oxidation States

Journal of Raman Spectroscopy, EarlyView.
By integrating μRaman and μXANES techniques, one can acquire insights into the oxidation state of iron in tourmalines from the dravite–schorl series, thereby enhancing the accuracy of the Mg/(Mg + Fe2+) ratio. The observed linear correlations for P2 peak position, P1/P2 relative intensities, and WOH(3) peak position in the Raman spectrum enable the ...
Lorenzo Pasetti, Simona Raneri, Alessandra Gianoncelli, Laurent Tranchant, Sebastian Schöder, Luciana Mantovani, Danilo Bersani   +6 more
wiley   +1 more source

Exploring Exogenic Sources for the Olivine on Asteroid (4) Vesta

, 2015
The detection of olivine on Vesta is interesting because it may provide critical insights into planetary differentiation early in our Solar System's history.
Cloutis, Edward A., Corre, Lucille Le, Dunn, Tasha, Izawa, Matthew R. M., Mann, Paul, Nathues, Andreas, Reddy, Vishnu, Sanchez, Juan A.   +7 more
core   +1 more source

The thermal expansion of monticellite and olivine

European Journal of Mineralogy
Abstract. The thermal expansion of two natural monticellite (CaMgSiO4) samples was measured by X-ray powder diffraction between 298 and 1250 K. Axial expansion in monticellite is anisotropic with α(c) > α(b) ≥α(a), with the volume expansion nearly equivalent to that of synthetic forsterite as measured in the same laboratory, although forsterite axes
Hovis, G., Tribaudino, M.
openaire   +3 more sources

Raman Study of the Slobodka Ordinary Chondrite

Journal of Raman Spectroscopy, EarlyView.
The texture and mineral chemistry of Slobodka are most consistent with L4 chondrites, exhibiting strong shock metamorphism characteristic of shock stage S4, including irregular and planar fractures, undulatory extinction, and mosaicism in olivine, pyroxene, and plagioclase.
M. Simopoulou, I. Baziotis, L. Ferrière, J. Hu, C. Sanchez‐Valle, P. N. Gamaletsos, D. Palles, J. Berndt, C. Ma, S. Klemme, P. D. Asimow   +10 more
wiley   +1 more source