Abstract
The proposition has been made and is now gaining popular acceptance that electron energy-loss spectroscopy (EELS) attached to a transmission electron microscope (TEM) can be used to semiquantitatively measure H in minerals-specifically, that there is a pre-peak to the O K edge near 530 eV whose intensity is a measure of H concentration in OH- and H2O-bearing minerals. I show here that the O K edges from H-bearing minerals, free of electron-beam damage, lack a peak near 530 eV. Instead, under electron irradiation in the TEM, a transient peak near 530 eV can form in H-bearing as well as anhydrous minerals. The intensity of the transient peak is dependent on total fluence and fluence rate. The origin of the radiation-induced peak at 530 eV is from O2 liberated during damage by the incident electron beam. In conclusion, there is no evidence for an OH peak near 530 eV from H-bearing minerals.
© 2015 by Walter de Gruyter Berlin/Boston
Articles in the same Issue
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- Slavikite—Revision of chemical composition and crystal structure
- Anisotropic elasticity of jarosite: A high-P synchrotron XRD study
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- Letter: Hibonite-(Fe), (Fe,Mg)Al12O19, a new alteration mineral from the Allende meteorite
- Letter: Ion irradiation of the TiO2 polymorphs and cassiterite
- Letter: Corundum + orthopyroxene ± spinel intergrowths in an ultrahigh-temperature Al-Mg granulite from the Southern Marginal Zone, Limpopo Belt, South Africa
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Articles in the same Issue
- Metamorphic ultrahigh-pressure tourmaline: Structure, chemistry, and correlations to P-T conditions
- Slavikite—Revision of chemical composition and crystal structure
- Anisotropic elasticity of jarosite: A high-P synchrotron XRD study
- Tourmaline of the elbaite-schorl series from the Himalaya Mine, Mesa Grande, California: A detailed investigation
- Characterization of Al-Si ordering state in an alkali feldspar using atom location by channeling-enhanced microanalysis (ALCHEMI)
- The relative stability of stoichiometrically related natural and synthetic double salts
- Free energy of formation of zircon based on solubility measurements at high temperature and pressure
- Structure refinement of a synthetic knorringite, Mg3(Cr0.8Mg0.1Si0.1)2(SiO4)3
- A mineral tracer toward high-resolution dust provenance on the Chinese Loess Plateau: SEM, TEM, and sulfur isotopes of sulfate inclusions in biotite
- High-resolution TEM study of jimthompsonite, chesterite, and chain-width disorder in Archean ultramafic rocks from Isua, West Greenland
- Retrograde hydration sequence in disordered Mg amphiboles: A TEM investigation
- Can electron energy-loss spectroscopy (EELS) be used to quantify hydrogen in minerals from the O K edge?
- Texture analysis of a turbostratically disordered Ca-montmorillonite
- Packing systematics of the silica polymorphs: The role played by O-O nonbonded interactions in the compression of quartz
- Calorimetric study of the surface energy of forsterite
- Crystallographic texture of the magnetite-hematite transformation: Evidence for topotactic relationships in natural samples from Quadrilátero Ferrífero, Brazil
- Semi-ordered crystalline structure of the Santa Olalla vermiculite inferred from X-ray powder diffraction
- Stishovite single-crystal growth and application to silicon self-diffusion measurements
- Density of dry peridotite magma at high pressure using an X-ray absorption method
- The crystal-structure and vacancy distribution in 6C pyrrhotite
- Thermal modification of hematite-ilmenite intergrowths in the Ecstall pluton, British Columbia, Canada
- A new Al-rich hydroxylian pseudorutile from Kalimantan, Indonesia
- Lapeyreite, Cu3O[AsO3(OH)]2·0.75H2O, a new mineral: Its description and crystal structure
- High P-T phase relation of magnesian (Mg0.7Fe0.3) staurolite compositon in the system FeO-MgO-Al2O3-SiO2-H2O: Implications for prograde high-pressure history of ultrahigh-temperature metamorphic rocks
- Letter: Hibonite-(Fe), (Fe,Mg)Al12O19, a new alteration mineral from the Allende meteorite
- Letter: Ion irradiation of the TiO2 polymorphs and cassiterite
- Letter: Corundum + orthopyroxene ± spinel intergrowths in an ultrahigh-temperature Al-Mg granulite from the Southern Marginal Zone, Limpopo Belt, South Africa
- Letter: Fe3+ spin transition in CaFe2O4 at high pressure
- Density functional theory and Monte Carlo study of octahedral cation ordering of Al/Fe/Mg cations in dioctahedral 2:1 phyllosilicates