Infrared reflection spectra, directional dispersion of the phonon modes and dynamical effective charges of FeS2-Marcasite

Lutz, H. D.; Wäschenbach, G.

doi:10.1007/bf00308209

Cited by 12 publications

(3 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…1. Vibrational modes of the Raman-allowed zone-centre phonon modes of marcasite-type compounds for the case of negligible mixing of X-X stretching vibrations (v) and X2 librations (R) Lutz and Willich (1977) and Lutz et al (1983); single crystal reflection spectra of FeS2 marcasite by Lutz and Willich (1975) and Lutz and Wfischenbach (1985).…”

Section: Introductionmentioning

confidence: 99%

Lattice vibration spectra. LXVIII. Single-crystal Raman spectra of marcasite-type iron chalcogenides and pnictides, FeX2 (X=S, Se, Te; P, As, Sb)

Lutz

Müller

1991

Phys Chem Minerals

View full text Add to dashboard Cite

Abstract. Single-crystal Raman spectra of marcasite-type FeS2, FeSe2, and FeTe 2 and loellingite-type FeP2, FeAs2, and FeSb2 are presented and discussed with reference to the energies of the two X-X stretching modes vx-x (Ag, Big) and the four X2 librations RX 2 (Ag, BIg, Bzg , B3g). The main results obtained are that (i) the intraionic X-X bonds of FeS2 marcasite and FeS2 pyrite are nearly equal in strengths (mean values of the S-S stretching modes 418 and 420 cm-1, respectively) and (ii) the interactions of the metal ions and the dumbbell-like X2 units increase on going from the chalcogenides to the respective pnictides and from FeS2 marcasite to pyrite (as shown from the frequencies of the X2 librations).

show abstract

Section: Introductionmentioning

confidence: 99%

Lattice vibration spectra. LXVIII. Single-crystal Raman spectra of marcasite-type iron chalcogenides and pnictides, FeX2 (X=S, Se, Te; P, As, Sb)

Lutz

Müller

1991

Phys Chem Minerals

View full text Add to dashboard Cite

show abstract

“…The fossil spectrum shows two modes with peaks close to 1,630 and 3,437 cm −1 , which we associate with the O-H vibrations of adsorbed water. In addition, the fossil spectrum displays modes in the 400-420 cm −1 region, which we assign to the Fe-S vibrational mode and associate with pyrite (FeS 2 ) [11][12][13][14]. We recall that pyrite, the most abundant of metal sulfides, is found in many a geological environment [14]; nonetheless, absolutely scarce evidence has hitherto been found of its presence in the Araripe Basin fossils.…”

Section: Resultsmentioning

confidence: 96%

Combination of Raman, Infrared, and X-Ray Energy-Dispersion Spectroscopies and X-Ray Diffraction to Study a Fossilization Process

et al. 2011

View full text Add to dashboard Cite

X-ray diffraction was combined with X-ray energy-dispersion, Fourier-transform infrared, and Raman spectroscopies to study the fossilization of a Cretaceous specimen of the plant Brachyphyllum castilhoi, a fossil from the Ipubi Formation, in the Araripe Sedimentary Basin, Northeastern Brazil. Among the possible fossilization processes, which could involve pyrite, silicon oxide, calcium oxide, or other minerals, we were able to single out pyritization as the central mechanism producing the fossil, more than 100 million years ago. In addition to expanding the knowledge of the Ipubi Formation, this study shows that, when combined with other experimental techniques, Raman spectroscopy is a valuable tool at the paleontologist's disposal.

show abstract

“…Increased metal-metal interactions can be seen in the reduction of dynamical effective ionicities in the a and c directions, relative to pyrite (Lutz and Wiischenbach 1985). Increased metal-metal interactions can be seen in the reduction of dynamical effective ionicities in the a and c directions, relative to pyrite (Lutz and Wiischenbach 1985).…”

Section: Pyrite-and Marcasite-structure Compoundsmentioning

confidence: 98%

Advanced Mineralogy

1994

View full text Add to dashboard Cite

Infrared reflection spectra, directional dispersion of the phonon modes and dynamical effective charges of FeS2-Marcasite

Cited by 12 publications

References 9 publications

Lattice vibration spectra. LXVIII. Single-crystal Raman spectra of marcasite-type iron chalcogenides and pnictides, FeX2 (X=S, Se, Te; P, As, Sb)

Lattice vibration spectra. LXVIII. Single-crystal Raman spectra of marcasite-type iron chalcogenides and pnictides, FeX2 (X=S, Se, Te; P, As, Sb)

Combination of Raman, Infrared, and X-Ray Energy-Dispersion Spectroscopies and X-Ray Diffraction to Study a Fossilization Process

Advanced Mineralogy

Contact Info

Product

Resources

About