Lattice dynamics and Raman scattering spectrum of elpasolite Rb2KScF6: Comparative analysis

Krylova, S. N.; Vtyurin, A. N.; Bulou, A.; Krylov, A. S.; Zamkova, N. G.

doi:10.1134/1.1778457

Cited by 18 publications

(12 citation statements)

References 8 publications

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“…It is worth noting that the positions of the vibrational bands in several elpasolites systems are similar [17][18][19][20][21][22]. Of the sixteen Raman-active modes, only five (two A 1g and three E g ) are normally observed between 200 and 600 cm -1 .…”

Section: Resultsmentioning

confidence: 99%

Raman and magnetic susceptibility studies of hexagonal elpasolite Cs2NaAlF6:Cr3+

Sosman

Yokaichiya

Bordallo

2009

Journal of Magnetism and Magnetic Materials

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a b s t r a c tPolarized Raman scattering spectra of distorted R3m elpasolites Cs 2 NaAlF 6 with a Cr 3+ content of 0.1, 0.5 and 3.0 at% have been studied at both room temperature and 16 K. A shoulder located near the very intense band assigned to the AlF 6 3À A 1g mode indicates that the guest ion causes only small perturbations to the host lattice. Magnetic susceptibility measurements performed on the 0.1, 0.5, 3, 10 and 50 at% samples show that for particular concentrations the Cr 3+ ions are not isolated, but participate to inter and/or intra-cluster magnetic exchange.

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Section: Resultsmentioning

confidence: 99%

Raman and magnetic susceptibility studies of hexagonal elpasolite Cs2NaAlF6:Cr3+

Sosman

Yokaichiya

Bordallo

2009

Journal of Magnetism and Magnetic Materials

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“…Figure 6 demonstrates the temperature dependences of frequencies and widths of the resulting doublet -the damping anomaly at the transition point is apparent here. At the same time, away from the transition these widths are practically constant (in contrast to the well-ordered elpasolite crystals -see, e.g., [11] for Rb 2 KScF 6 ) -evidently this damping is not related to vibrational anharmonicity.…”

Section: Temperature Transformation Of Spectrummentioning

confidence: 84%

A study of phase transition in (NH₄)₃WO₃F₃ oxyfluoride by Raman scattering

Крылов

Gerasimova

Vtyurin

et al. 2006

Physica Status Solidi (b)

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PACS 64.70. Kb, 78.30.Ly Raman scattering spectra of perovskite-like (NH 4 ) 3 WO 3 F 3 oxyfluoride are studied in the 70 -3600 cm -1 frequency range and the 93 -323 K temperature range including the transition point from orientationally disordered cubic phase into the lower symmetry one. Internal vibrations of ammonium ions and WO 3 F 3 octahedra have been found to exhibit transition anomalies. Analysis of measurements suggests that the transition under study is due mainly to the ordering of octahedra.

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“…3 Laser-evaporated ScO and N 2 , or Sc atoms and N 2 O form the matrix-trapped species OSc(Z 2 -N 2 ). 12 The IR spectra of MCl 2 (k 3 -L)(thf), where M = Sc, Y, HL = (1), R = COOH, CSSH and CH 2 OH, include nMS near 300 cm À1 , and nMO (R = CH 2 OH) 570 cm À1 . nScO for the former is at 906.5 cm À1 , and for the latter at 894.6 cm À1 .…”

Section: Scandium Yttrium and The Lanthanidesmentioning

confidence: 99%

“…59 With CH 3 X (X = Cl or Br), CH 2Q Ti(H)X are formed (nTiH 1618.4 cm À1 (Cl), 1619.0 cm À1 (Br); nTiC 766.5 cm À1 (Cl), 623.8 cm À1 (Br)), together with CH 3 TiX (nTiC 512.5 cm À1 , nTiCl 412 cm À1 (Cl); nTiC 508.8 cm À1 (Br)). 61 DFT calculations gave vibrational wavenumbers for TiH 12 2À , MH 12 (M = Cr, M or W) and MnH 12 + . 61 DFT calculations gave vibrational wavenumbers for TiH 12 2À , MH 12 (M = Cr, M or W) and MnH 12 + .…”

Section: Titanium Zirconium and Hafniummentioning

confidence: 99%

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Vibrational spectra of transition element compounds

Davidson¹

Spectroscopic Properties of Inorganic and Organometallic Compounds

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Scandium, yttrium and the lanthanidesLaser-ablated scandium atoms react with H 2 O/N 2 mixtures to give matrix-trapped (Z 1 -N 2 )Sc(H)OH, (Z 1 -N 2 ) 2 Sc(H)OH and (Z 2 -N 2 )Sc(H)OH. nScH assignments, based on isotopic shifts and DFT calculations, are listed in Table 1. 1 The FTIR spectrum of Sc 3 N@C 80 gave assignments for two isomers-both with trigonal planar Sc 3 N units. 2 There is IR evidence that ScO + in noble gas matrices forms adducts [ScO(Ng) 5Àn (Ng 0 ) n ] + , where n = 0-5, Ng, Ng 0 = Ar, Kr, Xe. nScO assignments are given in Table 2. 3 Laser-evaporated ScO and N 2 , or Sc atoms and N 2 O form the matrix-trapped species OSc(Z 2 -N 2 ). This rearranges to an Z 1 -form (OScNN) on UV irradiation. nScO for the former is at 906.5 cm À1 , and for the latter at 894.6 cm À1 . 4 The Raman spectrum of [Sc(OSMe 2 ) 6 ] 3+ includes symmetric (a g ) and degenerate (e g ) nScO modes at 429, 451 cm À1 , respectively. The IR spectrum includes bands at 452 and 463 cm À1 due to e u , a u modes, respectively. 5 Ab initio calculations gave skeletal vibrational wavenumbers for Sc(mda) 3 ,where mda = C 3 H 3 O 2 À . 6 Raman studies have revealed grain-size effects for nanocrystalline ZrO 2 -Sc 2 O 3 , i.e. (ZrO 2 ) 1Àx (Sc 2 O 3 ) x , where x = 0.02-0.16. 7 The IR and Raman spectra of M 2 (M 0 O 4 ) 3 , where M = Sc, In, M 0 = Mo, W, gave characteristic assignments. For Sc 2 (MoO 4 ) 3 , variable-temperature spectra show the effects of the ferroelastic phase transition. 8 There have been two other reports of Raman studies of the phase behaviour of Sc 2 (MoO 4 ) 3 . 9,10 Raman spectroscopy was used to characterise intermediate compositions in the systems Ln 2 S 3 -Ln 0 2 S 3 , where Ln = La, Dy, L 0 = Sc, Lu etc. 11 The variable-temperature Raman spectra of Rb 2 KScF 6 (elpasolite) were used to follow temperature-induced phase transitions (using both ScF 6 and lattice modes). 12 The IR spectra of MCl 2 (k 3 -L)(thf), where M = Sc, Y, HL = (1), R = COOH, CSSH and CH 2 OH, include nMS near 300 cm À1 , and nMO (R = CH 2 OH) 570 cm À1 . 13 Characteristic Raman bands were seen at 204 and 42 cm À1 for a superconducting YNi 2 B 2 C single crystal. 14 The IR spectrum of Y 2 O 3 shows that nY-O shifts to lower wavenumber with decreased particle size. 15 Variable-temperature Raman spectroscopy was used to follow phase transitions of Y 2 O 3 -ZrO 2 . 16 IR and Raman spectra gave vibrational wavenumbers for orthorhombic M 2 BaCuO 5 , where M = Y, Ho or Gd, assigned using a short-range force constant model. 17 The Raman spectra of Ln 3 NbO 7 , where Ln = Y, La, Nd, Gd, in the temperature range 298-973K gave evidence for reversible structural disordering on increasing temperature. 18 IR data, together with previous Raman bands, gave assignments for KY 3 F 10 single crystals, supported by a normal coordinate analysis. 19 The IR and Raman spectra of [Ln(OH 2 ) 9 ] 3+ , where Ln = La, Pr, Nd, Sm, Gd, Tb, Dy, Ho, Er, Tm, Yb or Lu, gave detailed assignments for the LnO 9 unit (D 3h ). 20 Structural characteristics of MFeGe 2 O 7 , where M...

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Lattice dynamics and Raman scattering spectrum of elpasolite Rb2KScF6: Comparative analysis

Cited by 18 publications

References 8 publications

Raman and magnetic susceptibility studies of hexagonal elpasolite Cs2NaAlF6:Cr3+

Raman and magnetic susceptibility studies of hexagonal elpasolite Cs2NaAlF6:Cr3+

A study of phase transition in (NH₄)₃WO₃F₃ oxyfluoride by Raman scattering

Vibrational spectra of transition element compounds

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Lattice dynamics and Raman scattering spectrum of elpasolite Rb2KScF6: Comparative analysis

Cited by 18 publications

References 8 publications

Raman and magnetic susceptibility studies of hexagonal elpasolite Cs2NaAlF6:Cr3+

Raman and magnetic susceptibility studies of hexagonal elpasolite Cs2NaAlF6:Cr3+

A study of phase transition in (NH4)3WO3F3 oxyfluoride by Raman scattering

Vibrational spectra of transition element compounds

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A study of phase transition in (NH₄)₃WO₃F₃ oxyfluoride by Raman scattering