Geochemistry and petrology of primitive achondrite meteorites LEW 88280, MAC 88177, ALHA 81187, EET 84302, and LEW 88663 [PDF]
Primitive achondrites are meteorites that have mineral and bulk chemical compositions similar to the most primitive meteorites (chondrites) but have textures similar to more evolved meteorites (achondrites).
Field, Stephen W.
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The mineralogy of newly formed dust in active galactic nuclei
, 2017 The tori around active galactic nuclei (AGN) are potential formation sites for large amounts of dust, and they may help resolve the so-called dust budget crisis at high redshift.
Foucaud, Sebastien +10 more
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Chemical and mineralogical characterization of silicon manganese iron slag as railway ballast
REM: International Engineering JournalIn nature, metal ores such as iron, lead, aluminum and others are found in an impure state, sometimes oxidized and mixed with silicates of other metals. During casting, when the ore is exposed to high temperatures, these impurities are separated from the
Ralph Werner Heringer Oliveira +3 more
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GeosciencesThermal conductivity is a decisive parameter in all geothermal applications. In addition to the influencing factors of density, saturation, porosity, temperature and pressure, it is, above all, the geochemical and mineralogical composition that ...
Oliver Suft +2 more
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Outward Motion of Porous Dust Aggregates by Stellar Radiation Pressure in Protoplanetary Disks
, 2014 We study the dust motion at the surface layer of protoplanetary disks. Dust grains in surface layer migrate outward due to angular momentum transport via gas-drag force induced by the stellar radiation pressure.
Nomura, Hideko, Tazaki, Ryo
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Evolution of oxygen isotopic composition in the inner solar nebula
, 2005 Changes in the chemical and isotopic composition of the solar nebula with time are reflected in the properties of different constituents that are preserved in chondritic meteorites. CR carbonaceous chondrites are among the most primitive of all chondrite
Aleon J. +30 more
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Standards for electron probe microanalysis of silicates prepared by convenient method [PDF]
, 1966 Standard compositions suitable for electron probe microanalysis of various silicates are prepared by coprecipitation of specified salts with colloidal silica to form a gel which is decomposed into a powdered oxide mixture and compressed into thin pellets.
Walter, L. S.
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Optical constants of refractory oxides at high temperatures
, 2013 Many cosmic dust species, among them refractory oxides, form at temperatures higher than 300 K. Nevertheless, most astrophysical studies are based on the room-temperature optical constants of solids, such as corundum and spinel. A more realistic approach
Mutschke, Harald +2 more
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Chemical and microbiological comparison of biodeterioration in Colombian heritage construccions
Universitas Scientiarum, 2013 Mortars from Bogotá, Villa de Leyva and Barichara were compared chemically and microbiologically. We analyzed the samples using atomic absorption and emission spectrometry, Fourier-transform infrared spectroscopy, X-ray diffraction, scanning electron ...
Cecilia López-Pérez +3 more
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Beneficiation and extraction of nonterrestrial materials, part 2 [PDF]
A review of options for processing extraterrestrial materials was dominated by industrial materials scientist who tried to identify which processes utilizing space materials could be implemented in the near term.
Agosto, William N.
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