IR- und Raman-Spektren der isotypen Iodathydrate M(IO3)2 · 4 H2O (M = Mg, Ni, Co); Kristallstruktur von Co(IO3)2 · 4 H2O

Pracht, G.; Nagel, R.; Suchanek, E.; Lange, N.; Lutz, H. D.; Maneva, M.

doi:10.1002/(sici)1521-3749(199808)624:8<1355::aid-zaac1355>3.0.co;2-5

Cited by 24 publications

(8 citation statements)

References 7 publications

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“…The presence of water in the structure is characterized by bands at 3395, 3230 and 1676 cm 1 and also at 766 and 570 cm 1 which correspond to stretching, bending and libration of lattice water, respectively, as already reported in numerous studies on hydrated compounds. 33,34 The 1528 cm 1 band was not clearly attributed, but its high wavenumber range and its large full width at half-Maximum (FWHM) are in favour of a combination of a lattice mode with a carbonate mode, as stated by Andersen and Brecevic,35 who observed in the IR spectrum of the amorphous phase a band at 1525 cm 1 and attributed it to 1 at 1075 cm 1 C 2ð lattice modes at 220 cm 1 . The observed vibrations of carbonate and water proved that this product was a hydrate of calcium carbonate and not a hydrogencarbonate.…”

Section: Calcium Carbonate Monohydratementioning

confidence: 97%

Characterization of CaCO₃ hydrates by micro‐Raman spectroscopy

Tlili

Amor

Gabrielli

et al. 2002

J Raman Spectroscopy

196

162

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The Raman spectra of the three varieties of hydrated calcium carbonate, monohydrate, hexahydrate and 'amorphous,' are reported for the first time and discussed according to the already known crystal structures. The transformation by dehydration of these hydrated phases into the usual anhydrous forms was followed by in situ micro-Raman spectroscopy. It is shown that the dehydration of the hexahydrate proceeds through the formation of the 'amorphous' phase. The latter is better described as microcrystalline monohydrate.

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Section: Calcium Carbonate Monohydratementioning

confidence: 97%

Characterization of CaCO₃ hydrates by micro‐Raman spectroscopy

Tlili

Amor

Gabrielli

et al. 2002

J Raman Spectroscopy

196

162

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“…The magnetic properties of some transition metal iodates have proven to be quite rich, with antiferromagnetic ordering being observed for Fe(IO 3 ) 3 below T N = 17 K, and weak ferromagnetism being found for Ni(IO 3 ) 2 ·2H 2 O beneath 3 K [4]. More recently Zn(IO 3 ) 2 ·2H 2 O, Ni(IO 3 ) 2 ·2H 2 O, and M(IO 3 ) 2 ·4H 2 O (M = Ni, Co) have been the subject of single crystal Raman and IR spectroscopic studies allowing for complete assignment of iodate stretching and bending modes [9,[11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Hydrothermal synthesis and structures of the homoleptic iodate complexes [M(IO3)6]2− (M = Mo, Zr)

Shehee¹,

Pehler²,

Albrecht‐Schmitt³

2005

Journal of Alloys and Compounds

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“…The latter partly appear in the same spectral region as the IO stretches, 8 but mostly exhibit only low intensity in the Raman experiment. 30 The internal bending vibrations of the iodate ions of the title compound, recorded from the spectra of polycrystalline samples, viz.…”

Section: Iodate Ions Io Stretching and Bending Vibrationsmentioning

confidence: 86%

Single‐crystal Raman studies on nickel iodate dihydrate, Ni(IO₃)₂·2H₂O

Schellenschläger¹,

Pracht²,

Lutz³

2001

J Raman Spectroscopy

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Single-crystal Raman spectra in the range 4000-35 cm −1 and the results of group theoretical treatment including Cartesian symmetry coordinates of nickel iodate dihydrate, Ni.IO 3 / 2 · 2H 2 O, (space group Pbca, Z = 4) are presented and discussed with respect to the strength of the HO -H· · ·OIO 3 hydrogen bonds and the extent of intramolecular (intraionic) coupling of the stretching vibrations of both the hydrate H 2 O molecules and the iodate IO 3 − ions. The energies and relative intensities of the IO stretching modes in the various species of the unit-cell group D 2h reveal that the iodate ions of the title compound behave as if they possess pseudo C 2v site symmetry with a at least partly uncoupled IO stretch due to the significantly shortest (175.5 pm) IO arm and a symmetric (n s ) and an antisymmetric stretching vibration (n as ) due to the remaining IO 2 group (r I -O = 184.2 and 186.0 pm). The respective site-group modes decrease in the order n 3a $ n IO.1/ (mean value of the respective unit-cell group modes: 804 cm −1 / > n 1 $ n s (772 cm −1 / > n 3b $ n as (744 cm −1 ) (n 1 and n 3 as for distorted C 3v IO 3 − ions). For the IO 3 − bending modes (430-300 cm −1 ) and the lattice modes below 300 cm −1 the true vibrational modes are not known. The normally used assignment to a symmetric (n 2 ) and an asymmetric bending vibration (n 4 ) as for C 3v IO 3 − ions is at least questionable.The hydrogen-bond distances calculated from the wavenumbers of the OD stretching modes of matrixisolated HDO molecules do not fully agree with the data of a neutron diffraction study performed in 1972.

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IR- und Raman-Spektren der isotypen Iodathydrate M(IO3)2 · 4 H2O (M = Mg, Ni, Co); Kristallstruktur von Co(IO3)2 · 4 H2O

Cited by 24 publications

References 7 publications

Characterization of CaCO₃ hydrates by micro‐Raman spectroscopy

Characterization of CaCO₃ hydrates by micro‐Raman spectroscopy

Hydrothermal synthesis and structures of the homoleptic iodate complexes [M(IO3)6]2− (M = Mo, Zr)

Single‐crystal Raman studies on nickel iodate dihydrate, Ni(IO₃)₂·2H₂O

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IR- und Raman-Spektren der isotypen Iodathydrate M(IO3)2 · 4 H2O (M = Mg, Ni, Co); Kristallstruktur von Co(IO3)2 · 4 H2O

Cited by 24 publications

References 7 publications

Characterization of CaCO3 hydrates by micro‐Raman spectroscopy

Characterization of CaCO3 hydrates by micro‐Raman spectroscopy

Hydrothermal synthesis and structures of the homoleptic iodate complexes [M(IO3)6]2− (M = Mo, Zr)

Single‐crystal Raman studies on nickel iodate dihydrate, Ni(IO3)2·2H2O

Contact Info

Product

Resources

About

Characterization of CaCO₃ hydrates by micro‐Raman spectroscopy

Characterization of CaCO₃ hydrates by micro‐Raman spectroscopy

Single‐crystal Raman studies on nickel iodate dihydrate, Ni(IO₃)₂·2H₂O