Instructions on the Use of the Mössbauer Data Index

Stevens, John G.; Stevens, Virginia E.

doi:10.1007/978-1-4757-5903-7_1

Cited by 9 publications

(5 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In addition, the reconstructed energy spectra contain a small but noticeable overall shift, the so-called isomeric shift. One obtains 1.037(6) Γ for the control case, in agreement with the literature value of 0.9(2) Γ [16]. The exo-interferometric situations A and B give 1.05(2) Γ and 0.67(2) Γ for the same quantity.…”

supporting

confidence: 89%

Exo-interferometric phase determination in nuclear resonant scattering

2004

View full text Add to dashboard Cite

The time-dependent phase change of x rays after transmission through a sample has been determined experimentally. We used an x-ray interferometer with a reference sample containing sharp nuclear resonances to prepare a phase-controlled x-ray beam. A sample with similar resonances was placed in the beam but outside of the interferometer; hence our use of the term "exo-interferometric." We show that the phase change of the x rays due to the sample can be uniquely determined from the time-dependent transmitted intensities. The energy response of the sample was reconstructed from the phase and the intensity data with a resolution of 23 neV.

show abstract

supporting

confidence: 89%

Exo-interferometric phase determination in nuclear resonant scattering

2004

View full text Add to dashboard Cite

show abstract

“…The best ev i dence co mes from sil i cates, mainly clay min erals, but the dif fer en ti a tion of sil i cates us ing the 57 Fe-MS method is un cer tain (Murad and Cashin, 2004;Stevens et al, 2005;Dyar et al, 2006;Murad, 2010). In brief, the green ish-blu ish shades may come from a rel a tively higher "illite" con tent (sample J4; see Fig.…”

Section: Discussion Which Components Determine the Sediment Colour?mentioning

confidence: 99%

Colours of the upper Neogene “Poznań Clays” in the light of sedimentological, mineralogical and nuclear methods

KLĘSK,

BŁACHOWSKI,

KRUSZEWSKI

et al. 2023

View full text Add to dashboard Cite

The Mio cene-Plio cene overbank fa cies "Poznañ Clays" are par tic u larly well ex posed in large lig nite out crops in cen tral Poland, for ex am ple, in the JóŸwin IIB opencast mine. Dur ing their ac cu mu la tion the cli mate fluc tu ated from mod er ately warm and hu mid to cool and dry. In gen eral, the dark grey and the grey ish-vi o let colours come from mac ro scop i cally vis i ble or ganic mat ter and the ab sence of he ma tite and/or goethite. The or ganic mat ter also af fects the Fe 3+ /Fe 2+ ra tio and, con se quently, the re dox con di tions. When the study area was poorly drained, there were fa vour able con di tions for plant veg e ta tion, re sulting in Histosols (hydromorphic palaeosols). In a re duc ing en vi ron ment, other sed i ments with "cold" colours (green ish to bluish shades) formed that in cluded py rite and/or gyp sum, though with few or no pig ments such as he ma tite, goethite or jarosite. At that time, el e men tal sul phur could also crys tal lize, oc ca sion ally giv ing a yel low ish shade to the sed i ment mot tles. When the area was well drained, most of the or ganic mat ter de cayed, and the Fe 3+ /Fe 2+ ra tio was rel a tively high due to pro gres sive weath er ing. Un der such con di tions, Vertisols de vel oped with "warm" colours (from yel low to cherry-red), en riched in he matite and goethite, and also con tain ing gyp sum and na tive sul phur. Key words: vari col oured sed i ments, or ganic mat ter, min eral com po si tion, iron com pounds, re dox con di tions, cli mate fluc tu ations.

show abstract

“…Firstly, the analysed pigments may be present in trace amounts in the sediments and thus their concentrations would be below the detection limit of the PXRD analysis (i.e., below 0.n wt%). Secondly, their trace amounts in iron oxides and hydroxides, and above all in Fe-bearing silicates, would make the determination of the exact minerals difficult by 57Fe-MS [36][37][38]. Another reason could be very low crystallinity of goethite, and possibly also hematite, making them indistinguishable from the PXRD background.…”

Section: Mineralogy Of the 'Poznań Clays'mentioning

confidence: 99%

Główne minerały barwiące w iłach poznańskich: Studia przypadków z górnego neogenu na Niżu Polskim

Klęsk,

Błachowski,

Kruszewsk

et al. 2024

View full text Add to dashboard Cite

This article is devoted exclusively to three iron minerals that have a decisive influence on the colour of the ‘Poznań Clays’. These are hematite, goethite, and jarosite. Their presence gives the ‘Poznań Clays’, which are the most common and best known Neogene lithostratigraphic unit in the Polish Lowlands, characteristic ‘warm’ colours ranging from yellow through orange to dark red. The presented results were mainly obtained using powder X-ray diffraction and 57Fe Mössbauer spectroscopy.

show abstract

Instructions on the Use of the Mössbauer Data Index

Cited by 9 publications

References 2 publications

Exo-interferometric phase determination in nuclear resonant scattering

Exo-interferometric phase determination in nuclear resonant scattering

Colours of the upper Neogene “Poznań Clays” in the light of sedimentological, mineralogical and nuclear methods

Główne minerały barwiące w iłach poznańskich: Studia przypadków z górnego neogenu na Niżu Polskim

Contact Info

Product

Resources

About