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Fedoseev, A. M.; Budantseva, N. A.; Yusov, A. B.; Shilov, V. P.; Delegard, Calvin H.

doi:10.1023/a:1020664609001

Cited by 5 publications

(4 citation statements)

References 22 publications

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“…Complexes of tri-and tetravalent f elements with "unsaturated" heteropolytungstates and decatungstates of these elements [5,6], which are extremely stable and have been studied in detail, form a particular class of HPCs. Complexes of oxygenated actinide cations with isopoly-and heteropolyanions have been considerably less studied, although compounds of hexavalent actinides (mainly uranyl) with [7][8][9][10]. Papers on U(VI) and Np(V) complexes with anions of various heteropolytungstates appeared only recently.…”

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confidence: 99%

Synthesis and spectra of Np(V) γ-Octamolybdates of the composition M6[(NpO2)2(Mo8O28)]·2H2O (M = NH4, K, Rb, Cs, Tl)

2015

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Previously unknown Np(V) compounds with γ-octamolybdate anions are reported. A series of complexes of the general composition M 6 [(NpO 2 ) 2 (Mo 8 O 28 )]·2H 2 O (M = NH 4 , K, Rb, Cs, Tl) were synthesized by the hydrothermal method from aqueous solutions. The composition and crystal structure of the compounds were determined by single crystal X-ray diffraction. All the compounds contain the NpO 2 + dioxocations, (Mo 8 O 28 ) 8anions, M + cations, and water molecules of crystallization. The Np atoms have the pentagonal bipyramidal oxygen surrounding, with five O atoms of three different octamolybdate ions arranged in the equatorial plane of the dioxocation. The complexes with the NH 4 , K, Rb, and Tl cations are isostructural (space group P1), whereas the complex with the Cs cation crystallizes in another space group (P2 1 /n). The structure of the centrosymmetric octamolybdate ions (Mo 8 O 28 ) 8is similar in all the compounds. The oxygen surrounding of the outer-sphere cations is characterized by a large scatter of the interatomic distances, and both the main and additional coordination numbers of the cations can be considered. The electronic and vibrational absorption spectra of the synthesized Np(V) octamolybdate complexes were measured and analyzed. The influence of the structural features of the complexes and of the kind of the outer-sphere cation on the spectral pattern is discussed.

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Synthesis and spectra of Np(V) γ-Octamolybdates of the composition M6[(NpO2)2(Mo8O28)]·2H2O (M = NH4, K, Rb, Cs, Tl)

2015

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“…Spectral bands due to UO 2þ 2 group appear at 923 (v 1 ) cm À1 and 914, 867 (v 3 ) cm À1 were observed in Tl 2 UO 2 (MoO 4 ) 2 but no spectral bands due to UO 2þ 2 were observed in Tl 2 U(MoO 4 ) 3 and Tl 4 U(MoO 4 ) 4 compounds. Fedoseev [31] also reported similar IR spectra of hydrated uranyl molybdates. FTIR spectra of all the four compounds viz.…”

Section: And Tl 4 A(moo 4 ) 4 [A = Th U Andmentioning

confidence: 71%

Synthesis and characterization of thallium–thorium molybdates and thallium–uranium (IV) molybdates

Dahale

Keskar

2011

Journal of Nuclear Materials

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“…The initial Np(VI) solution was prepared by a standard procedure [21]. Solutions of Na 2 CrO 4 or K 2 CrO 4 were prepared from reagent grade commercial chemicals.…”

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Study of the NpO 2 2+ -H2O-CrO 4 2− System. The Synthesis, Crystal Structure, and Properties of the Neptunium(VI) Chromate [(NpO2)(CrO4)(H2O)] ⋅ 4H2O

et al. 2005

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Cited by 5 publications

References 22 publications

Synthesis and spectra of Np(V) γ-Octamolybdates of the composition M6[(NpO2)2(Mo8O28)]·2H2O (M = NH4, K, Rb, Cs, Tl)

Synthesis and spectra of Np(V) γ-Octamolybdates of the composition M6[(NpO2)2(Mo8O28)]·2H2O (M = NH4, K, Rb, Cs, Tl)

Synthesis and characterization of thallium–thorium molybdates and thallium–uranium (IV) molybdates

Study of the NpO 2 2+ -H2O-CrO 4 2− System. The Synthesis, Crystal Structure, and Properties of the Neptunium(VI) Chromate [(NpO2)(CrO4)(H2O)] ⋅ 4H2O

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