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AbstractAbstract
[en] Hydrates of the lanthanide triiodides have been synthesized by evaporation of water from aqueous LnI3 solutions. The highest hydrated states are nonahydrates of the iodides of the larger lanthanides, (La to Dy) and octahydrates of the iodides of the smaller ones, (Tb to Lu) whereas Tb and Dy form nonahydrates as well as octahydrates. Dehydration of the nona- or octahydrates at 10-1 torr and room temperature results in the formation of hexahydrates of all rate earth iodides. Heating of the hexahydrates of the larger lanthanides La, Ce, Pr and Nd at 50degreeC (10-1 torr) leads to the formation of trihydrates and anhydrous salts. With the other hexahydrates decomposition was observed. (author)
Primary Subject
Record Type
Journal Article
Journal
Journal of Inorganic and Nuclear Chemistry; v. 38(5); p. 1019-1022
Country of publication
CERIUM IODIDES, CHEMICAL PREPARATION, CHEMICAL REACTIONS, DYSPROSIUM IODIDES, ERBIUM IODIDES, EUROPIUM IODIDES, GADOLINIUM IODIDES, HOLMIUM IODIDES, HYDRATES, LANTHANUM IODIDES, LUTETIUM IODIDES, NEODYMIUM IODIDES, PRASEODYMIUM IODIDES, PROMETHIUM IODIDES, SAMARIUM IODIDES, SCANDIUM IODIDES, TERBIUM IODIDES, THULIUM IODIDES, YTTERBIUM IODIDES, YTTRIUM IODIDES
CERIUM COMPOUNDS, DYSPROSIUM COMPOUNDS, ERBIUM COMPOUNDS, EUROPIUM COMPOUNDS, GADOLINIUM COMPOUNDS, HALIDES, HALOGEN COMPOUNDS, HOLMIUM COMPOUNDS, IODIDES, IODINE COMPOUNDS, LANTHANUM COMPOUNDS, LUTETIUM COMPOUNDS, NEODYMIUM COMPOUNDS, PRASEODYMIUM COMPOUNDS, PROMETHIUM COMPOUNDS, RARE EARTH COMPOUNDS, SAMARIUM COMPOUNDS, SCANDIUM COMPOUNDS, SYNTHESIS, TERBIUM COMPOUNDS, THULIUM COMPOUNDS, TRANSITION ELEMENT COMPOUNDS, YTTERBIUM COMPOUNDS, YTTRIUM COMPOUNDS
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
AbstractAbstract
No abstract available
Original Title
Nizshie iodidy indiya kak vosstanoviteli
Primary Subject
Source
11 refs.; published in summary form onlv; for English translation see the journal Russ. J. Inorg. Chem.
Record Type
Journal Article
Journal
Zhurnal Neorganicheskoj Khimii; v. 21(7); p. 1715-1718
Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
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Meyer, Gerd, E-mail: gerd.meyer@uni-koeln.de2008
AbstractAbstract
[en] The rare-earth diiodides RI2 may be divided into two classes. At ambient conditions, the rare-earth cation R2+ may have the electronic configuration [Xe]6s05d04fn (R = Nd, Sm, Eu, Dy, Tm, Yb). The respective diiodides, also classified as (R2+)(I-)2, are structurally reminiscent of alkaline-earth iodides. Diiodides with R = La, Ce, Pr, and Gd have one excess electron according to [Xe]6s05d14fn-1, chemically: (R3+)(e-)(I-)2, and exhibit mostly CuTi2 or MoS2 type structures. The configuration crossover 5d04fn ↔ 5d14fn-1 is observed with praseodymium (and neodymium) and is dependent upon the conditions (temperature, pressure) and the crystal structure adopted. 'ScI2' is a special case as it stabilizes its electronic structure through an under-occupation of the scandium sites. Further stabilization of 'reduced iodides' is possible by encapsulation of mono- or di-carbon units in tetrahedral or octahedral clusters. Examples are Pr{Pr6C}I12, Cs2{Pr6(C2)}I12 and Sc24C10I30
Primary Subject
Source
ICFE-6: 6. international conference on f-elements; Wroclaw (Poland); 4-9 Sep 2006; S0925-8388(07)00895-X; Available from http://dx.doi.org/10.1016/j.jallcom.2007.04.083; Copyright (c) 2007 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Record Type
Journal Article
Literature Type
Conference
Journal
Country of publication
CERIUM COMPOUNDS, CHARGED PARTICLES, CRYSTAL DEFECTS, CRYSTAL STRUCTURE, DYSPROSIUM COMPOUNDS, ELEMENTS, EUROPIUM COMPOUNDS, GADOLINIUM COMPOUNDS, HALIDES, HALOGEN COMPOUNDS, IODIDES, IODINE COMPOUNDS, IONS, NEODYMIUM COMPOUNDS, NONMETALS, POINT DEFECTS, PRASEODYMIUM COMPOUNDS, RARE EARTH COMPOUNDS, SAMARIUM COMPOUNDS, THULIUM COMPOUNDS, YTTERBIUM COMPOUNDS
Reference NumberReference Number
INIS VolumeINIS Volume
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AbstractAbstract
[en] Addition compounds of lanthanide salts and the ligands: N,N,N',N'-tetramethylmalonamide (TMMA) and N,N,N',N'-tetramethylapipamide (TMAA) have been described. This note reports the preparation of the adducts of anhydrous lanthanide iodides and TMMA. The compounds with compositions: LnI3.5TMMA (Ln = La, Ce) and LnI3.4TMMA (Ln = Pr-Lu, Y), were characterized by analytical procedures, X-ray powder patterns, IR spectra, absorption spectrum of the neodymium compound, emission spectrum of the europium compound and conductance measurements in nitromethane, acetonitrile and methanol. (author)
Primary Subject
Record Type
Journal Article
Literature Type
Numerical Data
Journal
Journal of Inorganic and Nuclear Chemistry; ISSN 0022-1902;
; v. 41(1); p. 103-106

Country of publication
ADDUCTS, AMIDES, CERIUM IODIDES, CHEMICAL ANALYSIS, DYSPROSIUM IODIDES, ELECTRIC CONDUCTIVITY, ERBIUM IODIDES, EUROPIUM IODIDES, EXPERIMENTAL DATA, GADOLINIUM IODIDES, GRAPHS, HOLMIUM IODIDES, INFRARED SPECTRA, ISOLATED VALUES, LANTHANUM IODIDES, LIGANDS, LUTETIUM IODIDES, MALONIC ACID, NEODYMIUM IODIDES, PRASEODYMIUM IODIDES, SAMARIUM IODIDES, SOLUTIONS, TERBIUM IODIDES, THULIUM IODIDES, VISIBLE SPECTRA, X-RAY DIFFRACTION, YTTERBIUM IODIDES, YTTRIUM IODIDES
CARBOXYLIC ACIDS, CERIUM COMPOUNDS, COHERENT SCATTERING, DATA, DATA FORMS, DICARBOXYLIC ACIDS, DIFFRACTION, DISPERSIONS, DYSPROSIUM COMPOUNDS, ELECTRICAL PROPERTIES, ERBIUM COMPOUNDS, EUROPIUM COMPOUNDS, GADOLINIUM COMPOUNDS, HALIDES, HALOGEN COMPOUNDS, HOLMIUM COMPOUNDS, HOMOGENEOUS MIXTURES, INFORMATION, IODIDES, IODINE COMPOUNDS, LANTHANUM COMPOUNDS, LUTETIUM COMPOUNDS, MIXTURES, NEODYMIUM COMPOUNDS, NUMERICAL DATA, ORGANIC ACIDS, ORGANIC COMPOUNDS, ORGANIC NITROGEN COMPOUNDS, PHYSICAL PROPERTIES, PRASEODYMIUM COMPOUNDS, RARE EARTH COMPOUNDS, SAMARIUM COMPOUNDS, SCATTERING, SPECTRA, TERBIUM COMPOUNDS, THULIUM COMPOUNDS, TRANSITION ELEMENT COMPOUNDS, YTTERBIUM COMPOUNDS, YTTRIUM COMPOUNDS
Reference NumberReference Number
INIS VolumeINIS Volume
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Haire, R.G.; Young, J.P.; Bourges, J.Y.
Oak Ridge National Lab., TN (USA)1979
Oak Ridge National Lab., TN (USA)1979
AbstractAbstract
[en] Results are described of the examination of anhydrous tri-iodides of neodymium and samarium and the oxy-iodide of neodymium, by x-ray powder diffraction and spectrophotometry. Lattice parameters are given LaI3, PrI3, NdI3, SmI3, GdI3, TbI3, and NdOI
Primary Subject
Source
1979; 6 p; Rare earth research conference; Fargo, ND, USA; 25 - 28 Jun 1979; Available from NTIS., PC A02/MF A01
Record Type
Report
Literature Type
Conference
Report Number
Country of publication
ACTINIDE COMPOUNDS, AMERICIUM COMPOUNDS, COHERENT SCATTERING, DIFFRACTION, GADOLINIUM COMPOUNDS, HALIDES, HALOGEN COMPOUNDS, IODIDES, IODINE COMPOUNDS, LANTHANUM COMPOUNDS, NEODYMIUM COMPOUNDS, OXYGEN COMPOUNDS, PRASEODYMIUM COMPOUNDS, RARE EARTH COMPOUNDS, SAMARIUM COMPOUNDS, SCATTERING, TERBIUM COMPOUNDS, TRANSURANIUM COMPOUNDS
Reference NumberReference Number
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AbstractAbstract
[en] The diffuse reflectance and photoluminescence (PL) spectra of NdI2, SmI2, EuI2, DyI2, TmI2 and YbI2 were measured between 225 and 12 500 nm in order to determine their 4fn → 4fn-15d1 optical bandgaps. The results were compared with those obtained using an empirical model of the electronic structure of LnI2. The results can be used to explain the lanthanide valency and crystalline structure changes of other lanthanide diiodides such as PrI2. (paper)
Source
Available from http://dx.doi.org/10.1088/0953-8984/24/27/275502; Country of input: International Atomic Energy Agency (IAEA)
Record Type
Journal Article
Journal
Country of publication
DYSPROSIUM COMPOUNDS, DYSPROSIUM HALIDES, ELEMENTS, EMISSION, EUROPIUM COMPOUNDS, EUROPIUM HALIDES, HALIDES, HALOGEN COMPOUNDS, IODIDES, IODINE COMPOUNDS, LUMINESCENCE, METALS, NEODYMIUM COMPOUNDS, NEODYMIUM HALIDES, PHOTON EMISSION, RARE EARTH COMPOUNDS, SAMARIUM COMPOUNDS, SAMARIUM HALIDES, THULIUM COMPOUNDS, THULIUM HALIDES, YTTERBIUM COMPOUNDS, YTTERBIUM HALIDES
Reference NumberReference Number
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AbstractAbstract
[en] The heterogeneous exchange processes of mixed AgI+PbI2 ppts. with I- from KI soln. were studied at 293 K using sup(131)I in the systems in statu nascendi. Radiometrically detd. soly., DTA and X-ray diffraction data were compared with the radioanalytical results on the heterogeneous exchange process. The results show a strong mutual dependence of the metal halides AgI particles during the Ostwald's ripening process
Primary Subject
Source
1 tabs. 9 figs. 7 refs.
Record Type
Journal Article
Journal
Croatica Chemica Acta; ISSN 0011-1643;
; v. 49(1); p. 7-14

Country of publication
Reference NumberReference Number
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AbstractAbstract
[en] The hyperfine interaction parameters at the iodine site in various metal diiodides (M=V, Cr, Mn, Fe, Co, Ni, and Cd) were measured using the 27.8 keV Moessbauer transition in 129I. Charge densities in the valence orbitals are deduced from an interpretation of isomer shift and quadrupole coupling constant values. Magnetic hyperfine interactions transferred at the originally diamagnetic iodine ion in the magnetically ordered phases of the compounds allow one to determine the unpaired spin densities in the valence orbitals. Information relative to the magnetic structures is obtained from the number and intensities of magnetically nonequivalent sites and from the relative orientation between the transferred field and the electric field gradient axes. The Moessbauer spectra of 129Xe impurities created by β- decay of 129I in the NiI2 lattice reveal the absence of bonding of xenon atoms in this matrix
Primary Subject
Secondary Subject
Record Type
Journal Article
Journal
Journal of Chemical Physics; v. 65(12); p. 5093-5102
Country of publication
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AbstractAbstract
[en] The isotopic exchange reactions between methyl iodide and sodium, potassium, rubidium, and cesium iodides in absolute methanol at 25 deg C have been studied. Individual rate constants were determined for the free iodide ions as well as for Na+I-, K+I-, Rb+I-, and Cs+I-ion pairs. The data obtained prove that the free iodide ion rate constant is independent of the cation as might be theoretically expected. The value of the overall reaction rate constant, ksub(m) indicate that in contradiction to the foregoing supposition ion-pairs do take part in exchange reactions in addition to free ions. The previous conception, namely that the rate constant of free iodide ion, ksub(i)>ksub(m)>O, was correct. Since activity coefficients have been directly determined it has been believed that these values and hence the rate constants are more accurate than previously given values. The data obtained show that ksub(m) is of the same magnitude as ksub(i). This indicates that the exchange reaction between the organic reactant and alkali iodide ion-pairs is by no means negligible. The decreasing trend of ksub(m), i.e. the decreasing reactivity of paired iodide ion, when going from sodium iodide to cesium iodide, indicates that the solvent separation of the ions in the ion-pair decreases. In other words, the character as contact ion-pair increases in the order Na+I-< K+I-< Rb+I-< Cs+I-. (T.I.)
Primary Subject
Source
1 fig.; 12 refs.; 2 tabs.
Record Type
Journal Article
Journal
Radiochemical and Radioanalytical Letters; v. 25(4); p. 263-269
Country of publication
ALCOHOLS, ALKALI METAL COMPOUNDS, CESIUM COMPOUNDS, HALIDES, HALOGEN COMPOUNDS, HYDROXY COMPOUNDS, INFORMATION, INORGANIC PHOSPHORS, IODIDES, IODINE COMPOUNDS, KINETICS, ORGANIC COMPOUNDS, ORGANIC HALOGEN COMPOUNDS, ORGANIC IODINE COMPOUNDS, PHOSPHORS, POTASSIUM COMPOUNDS, REACTION KINETICS, RUBIDIUM COMPOUNDS, SODIUM COMPOUNDS
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AbstractAbstract
No abstract available
Original Title
Sistemy TlCl-RbCl-CsCl i NaI-TlI-CsI
Primary Subject
Source
Published in summary form only; for English translation see the journal Sov. Prog. Chem.
Record Type
Journal Article
Journal
Ukrainskij Khimicheskij Zhurnal; v. 41(2); p. 210-211
Country of publication
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