Results 1 to 10 of about 289,818 (249)
The shape and composition of interstellar silicate grains [PDF]
, 2006 We investigate the composition and shape distribution of silicate dust grains in the interstellar medium. The effect of the amount of magnesium in the silicate lattice is studied.
A. de Koter +55 more
core +25 more sources
A hidden reservoir of Fe/FeS in interstellar silicates? [PDF]
, 2014 The depletion of iron and sulphur into dust in the interstellar medium and the exact nature of interstellar amorphous silicate grains is still an open question. We study the incorporation of iron and sulphur into amorphous silicates of olivine- and pyroxene-type and their effects on the dust spectroscopy and thermal emission.
M. Köhler, A. Jones, N. Ysard
arxiv +3 more sources
A structure hierarchy for silicate minerals: sheet silicates [PDF]
Mineralogical Magazine, 2018 AbstractThe structure hierarchy hypothesis states thatstructures may be ordered hierarchically according to the polymerisation of coordination polyhedra of higher bond-valence. A hierarchical structural classification is developed for sheet-silicate minerals based on the connectedness of the two-dimensional polymerisations of (TO4) tetrahedra, where T =
Elena Sokolova +2 more
openaire +3 more sources
A complete census of silicate features in the mid-infrared spectra of active galaxies [PDF]
, 2015 We present a comprehensive study of the silicate features at 9.7 and 18 micron of a sample of almost 800 active galactic nuclei (AGN) with available spectra from the Spitzer InfraRed Spectrograph (IRS).
Feltre, Anna +3 more
core +4 more sources
On Ultrasmall Silicate Grains in the Diffuse Interstellar Medium [PDF]
, 2000 The abundance of both amorphous and crystalline silicates in very small grains is limited by the fact that the 10 micron silicate emission feature is not detected in the diffuse ISM.
Aigen Li +17 more
core +3 more sources
The absence of crystalline silicates in the diffuse interstellar medium [PDF]
Astrophys.J. 609 (2004) 826-837, 2004 We have studied the dust along the line-of-sight towards the Galactic Center using Short Wavelength Spectrometer (SWS) data obtained with the Infrared Space Observatory (ISO). We focussed on the wavelength region from 8-13 micron which is dominated by the strong silicate absorption feature. Using the absorption profiles observed towards Galactic Center
F. Kemper, W. Vriend, A. Tielens
arxiv +3 more sources
Gels, 2023 This study explores the influence of temperature–time conditions, surfactants, and varied waste compositions on the curing of geopolymer gels, a foam formation with the properties of porous geopolymers. Findings reveal that a 6 h curing period leads to a
Elena A. Yatsenko +7 more
doaj +1 more source
Aerosol composition of hot giant exoplanets dominated by silicates and hydrocarbon hazes [PDF]
, 2020 Aerosols are common in the atmospheres of exoplanets across a wide swath of temperatures, masses and ages 1 – 3 . These aerosols strongly impact observations of transmitted, reflected and emitted light from exoplanets, obfuscating our understanding of ...
P. Gao +8 more
semanticscholar +1 more source
Recycling Ash and Slag Waste from Thermal Power Plants to Produce Foamed Geopolymers
Energies, 2023 Ash and slag waste (ASW) from coal combustion creates significant environmental and economic challenges. A promising method of ASW recycling is alkali activation with geopolymer material formation.
Elena A. Yatsenko +6 more
doaj +1 more source