Na-, Al-, and Si K-edge XANES study of sodium silicate and sodium aluminosilicate glasses: influence of the glass surface

Wispelaere, S. de; Cabaret, Delphine; Levelut, Claire; Rossano, Stéphanie; Flank, A.‐M.; Parent, P.; Farges, François

doi:10.1016/j.chemgeo.2004.08.033

Cited by 25 publications

(18 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Edges occurring at lower energies are not able to provide a large enough energy range for EXAFS analysis due to interference from other elemental edges for most geochemically relevant materials. The edge itself has been extensively investigated both in minerals (cf., Li et al 1993Li et al , 1994Li et al , 1995aGilbert et al 2003) and glasses/melts (cf., Davoli et al 1992;Henderson 1995;Henderson and Fleet 1997;Henderson and St-Amour 2004;de Wispelaere et al 2004;de Ligny et al 2009). Furthermore, a significant amount of work has been published on this edge using electron energy loss (EELS), parallel electron energy loss (PEELS) or energy loss near edge spectroscopy (ELNES) and this literature can be very helpful for interpreting soft X-ray XANES spectra (cf., McComb et al 1991;Garvie et al 1994Garvie et al , 2000Sharp et al 1996;Poe et al 1997;van Aken et al 1998;Garvie and Buseck 1999).…”

Section: Silicon and Aluminum K-and L-edgesmentioning

confidence: 99%

“…Aluminum K-edge. The aluminum K-edge (~1550-1650 eV) has been extensively utilized in mineralogical and geochemical studies (McKeown et al 1985;McKeown 1989;Ildefonse et al 1994Ildefonse et al , 1995Ildefonse et al , 1998Li et al 1995b;Fröba et al 1995;Wu et al 1997a;Giuli et al 2000;Romano et al 2000;Arai and Sparks 2002;van Bokhoven et al 2003;Neuville et al 2004aNeuville et al , 2010de Wispelaere et al 2004;Khare et al 2005;Hu et al 2008;Xu et al 2010;Rivard et al 2013). In general the Al K-edge for 4-fold coordinated Al ( [4] Al) occurs at ~1566 eV and usually exhibits a single edge maximum or peak.…”

Section: Silicon and Aluminum K-and L-edgesmentioning

confidence: 99%

“…Mottana et al (1997) looked at Ca-Na pyroxenes while Neuville et al (2004b) have looked at a range of mineral phases and glasses. Glasses have also been investigated by Cormier and Neuville (2004) who looked at Ca-Na glasses and De Wispelaere et al (2004) who investigated Na silicate and sodium-alumino-silicate glasses. Representative spectra are shown in Figure 16.…”

Section: Alkalis (Li Na K Rb Cs)mentioning

confidence: 99%

See 2 more Smart Citations

X-ray Absorption Near-Edge Structure (XANES) Spectroscopy

Henderson

Groot

Moulton

2014

Reviews in Mineralogy and Geochemistry

255

155

View full text Add to dashboard Cite

In addition to the XANES region, at higher energies the extended X-ray absorption fine structure (EXAFS) region is found. The spectral shape in the near-edge region is determined by electronic density of states effects and gives mainly information about the electronic properties and the local geometry of the absorbing atom. The EXAFS region is dominated by single scattering events of the outgoing electron on the neighboring atoms, providing mainly information about the local geometric structure around the absorbing site. In this chapter we will focus on XANES. XANES SpectroscopyIn XPS the ground state (Ψ 0 ) is excited to the ground state plus a core hole (c), where the electron (ε) is excited to higher energy, while in XAS the ground state is excited with a coreto-valence excitation (cv). The XPS binding (E B ) is defined as the photon energy (Ω) minus the measured kinetic energy of the electron (E k ) and corrected for the work function (φ):The work function is the minimal energy to emit an electron from the material. In metals the XAS edge energy can be assumed to be equal to the XPS binding energy, because exactly at the XPS binding energy a transition is possible to the lowest empty state. Experimentally the XAS edge energy can be slightly higher than the XPS binding energy, for example if the transition to the lowest empty state is forbidden by selection rules. Single electron excitation approximation and selection rulesIn first approximation XANES can be described as the excitation of a core electron to an empty state. In the Fermi golden rule, the initial state wave function is rewritten as a core wave function and the final state wave function (ε) as a valence electron wave function (ν). This implicitly assumes that all other electrons do not participate in the X-ray induced transition. In this approximation, the Fermi golden rule can be written as:The X-ray absorption selection rules determine that the dipole matrix element is non-zero if the orbital quantum number of the final state differs by one from the initial state (∆L = ± 1, i.e., s → p, p → s or d, etc.) and the spin is conserved (∆S = 0). In the dipole approximation, the shape of the absorption spectrum should look like the partial density of the (∆L = ± 1) empty states projected on the absorbing site, convoluted with a Lorentzian. This Lorentzian broadening is due to the finite lifetime of the core-hole, leading to an uncertainty in its energy according to Heisenberg's principle. The single electron approximation gives an adequate simulation of the XANES spectral shape if the interactions between the electrons in the final state are relatively weak. This is the case for all excitations from 1s core states (K-edges).

show abstract

Section: Silicon and Aluminum K-and L-edgesmentioning

confidence: 99%

Section: Silicon and Aluminum K-and L-edgesmentioning

confidence: 99%

Section: Alkalis (Li Na K Rb Cs)mentioning

confidence: 99%

See 1 more Smart Citation

X-ray Absorption Near-Edge Structure (XANES) Spectroscopy

Henderson

Groot

Moulton

2014

Reviews in Mineralogy and Geochemistry

255

155

View full text Add to dashboard Cite

show abstract

“…The spectrum provides constraints for determining phases involved in geochemical reactions (e.g. Wong et al, 1994;Li et al, 1999;Wispelaere et al, 2004;Finch & Allison, 2008;Foster et al, 2008;Ingall et al, 2011). Recently, the application of Mg K-edge XANES to characterize the local environment of Mg in biogenic CaCO 3 produced by corals, bivalves and brachiopods has provided direct evidence for Mg incorporation into CaCO 3 (Finch & Allison, 2008;Foster et al, 2008;Cusack et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

MagnesiumK-edge XANES spectroscopy of geological standards

Yoshimura

Tamenori

Iwasaki

et al. 2013

J Synchrotron Radiat

View full text Add to dashboard Cite

Magnesium K-edge X-ray absorption near-edge structure (XANES) spectra have been investigated to develop a systematic understanding of a suite of Mg-bearing geological materials such as silicate and carbonate minerals, sediments, rocks and chemical reagents. For the model compounds the Mg XANES was found to vary widely between compounds and to provide a fingerprint for the form of Mg involved in geologic materials. The energy positions and resonance features obtained from these spectra can be used to specify the dominant molecular host site of Mg, thus shedding light on Mg partitioning and isotope fractionation in geologic materials and providing a valuable complement to existing knowledge of Mg geochemistry.

show abstract

“…Na average bond valences below 0.2 v.u.) (Wispelaere et al, 2004). Na-O and Al-O bonds are longer than Si-O, but Si-O energy bond is at about 20% higher than energy of Al-O bond (Stein & Spera, 1993).…”

Section: Dietzel Theory Field Strength and Bonds In The Structurementioning

confidence: 99%

Physical and thermodynamic properties of aluminosilicate melts as a function of composition

Falenty¹

View full text Add to dashboard Cite

who supported me at this time and have found enough time and patient for nice chatting or sometimes to listen my grumbling.Appreciation continues to Petra Wolfrath for the help with formalities; to D.G. Brouwer, K.H. Klapproth and E. Wartala for technical support.A very special appreciation is due to my husband, Andrzej. Dziękuję Ci za zrozumienie, cierpliwość, codzienne wsparcie i skuteczne dodawanie wiary w siebie.I am also thankful to my parents. Kochani Rodzice -dziękuję Wam za troskę, duchowe wsparcie i stały kontakt.

show abstract

Na-, Al-, and Si K-edge XANES study of sodium silicate and sodium aluminosilicate glasses: influence of the glass surface

Cited by 25 publications

References 19 publications

X-ray Absorption Near-Edge Structure (XANES) Spectroscopy

X-ray Absorption Near-Edge Structure (XANES) Spectroscopy

MagnesiumK-edge XANES spectroscopy of geological standards

Physical and thermodynamic properties of aluminosilicate melts as a function of composition

Contact Info

Product

Resources

About