Structural and thermal studies on Na2Th(MoO4)3, Na2Pu(MoO4)3, Na4Th(MoO4)4 and Na4Pu(MoO4)4

Dahale, N.D.; Keskar, Meera; Mudher, K.D. Singh

doi:10.1016/j.jallcom.2005.07.066

Cited by 25 publications

(32 citation statements)

References 7 publications

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“…The indexed XRD data of the compound is given in Table 4. Earlier we have reported cell parameters for Na 4 Th(MoO 4 ) 4 and Na 4 Pu(MoO 4 ) 4 [7]. The similarities in the cell parameters of Na 4 U(MoO 4 ) 4 , Na 4 Th(MoO 4 ) 4 and Na 4 Pu(MoO 4 ) 4 suggest them to be isostructural.…”

Section: Structural Studies Of Na 4 U(moo 4 )mentioning

confidence: 71%

“…As shown for Na 2 Th(MoO 4 ) 3 and Na 2 Pu(MoO 4 ) 3 [7], the structure of Na 2 U(MoO 4 ) 3 consists of Na + and U 4+ ions surrounded by eight oxygen atoms, at distances given in Table 3. Mo has four oxygen atoms in tetrahedral arrangement at equal distance of 0.1767(5) nm in Na 2 U(MoO 4 ) 3 .…”

Section: Structural Studies Of Na 2 U(moo 4 )mentioning

confidence: 87%

“…The indexed XRD data of the compound is given in Table 1. The similarities in the cell parameters of Na 2 U(MoO 4 ) 3 with Na 2 Th(MoO 4 ) 3 and Na 2 Pu(MoO 4 ) 3 suggest that these compounds are isostructural [5,7]. The crystal structure of Na 2 U(MoO 4 ) 3 was derived by Rietveld profile analysis of the measured X-ray intensity data, using the structural parameters of Na 2 Pu(MoO 4 ) 3 for the scheelite (CaWO 4 ) phase in the tetragonal space group I4 1 /a (No.…”

Section: Structural Studies Of Na 2 U(moo 4 )mentioning

confidence: 98%

“…The crystal structure of Na 4 U(MoO 4 ) 4 was derived using the structural parameters of the super scheelite phase of Na 4 Pu(MoO 4 ) 4 [7] and K 4 Th(MoO 4 ) 4 [11], in the tetragonal space group I4 1 /a (No. 88).…”

Section: Structural Studies Of Na 4 U(moo 4 )mentioning

confidence: 99%

“…The powder X-ray diffraction (XRD) data of Na 4 U(MoO 4 ) 4 , the only reported compound in Na-U(IV)-Mo-O system is indexed on monoclinic system [4], whereas Na 4 Th(MoO 4 ) 4 , Na 4 Pu(MoO 4 ) 4 and Na 4 Np(MoO 4 ) 4 belong to the tetragonal system having similar lattice parameters, indicating the compounds are isostructural [5,6]. Earlier we have studied the crystal structure of Na 2 Th(MoO 4 ) 3 , Na 2 Pu(MoO 4 ) 3 , Na 4 Th(MoO 4 ) 4 and Na 4 Pu(MoO 4 ) 4 compounds by Rietveld profile method and established that, Na 2 Th(MoO 4 ) 3 and Na 2 Pu(MoO 4 ) 3 have scheelite structure, whereas Na 4 Th(MoO 4 ) 4 and Na 4 Pu(MoO 4 ) 4 have scheelite superlattice structure [7].…”

Section: Introductionmentioning

confidence: 99%

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Structural and thermal studies on Na2U(MoO4)3 and Na4U(MoO4)4

Dahale

Keskar

Kulkarni

et al. 2007

Journal of Alloys and Compounds

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Section: Structural Studies Of Na 4 U(moo 4 )mentioning

confidence: 71%

Section: Structural Studies Of Na 2 U(moo 4 )mentioning

confidence: 87%

Section: Structural Studies Of Na 2 U(moo 4 )mentioning

confidence: 98%

Section: Structural Studies Of Na 4 U(moo 4 )mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Structural and thermal studies on Na2U(MoO4)3 and Na4U(MoO4)4

Dahale

Keskar

Kulkarni

et al. 2007

Journal of Alloys and Compounds

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Dinuclear Face‐Sharing Bi‐octahedral Tungsten(VI) Core and Unusual Thermal Behavior in Complex Th Tungstates

Xiao

Gesing

Robben

et al. 2015

Chemistry A European J

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Two new thorium tungstates A6 Th6 (WO4 )14 O (A=K and Rb) were synthesized by high-temperature solid-state reactions. The structures of both phases are based on a rare dinuclear confacial bi-octahedral [W2 O9 ](6-) core, encapsulated in a [Th6 W7 O46 (W2 O9 )](32-) cage showing a cross-section geometry similar to a six-leafed lily. The adjacent cages are connected in two dimensional layers by WO4 tetrahedral linkers. Due to the dissimilarities in mutual orientations of adjacent layers in these two structures, K6 Th6 (WO4 )14 O crystallizes in space group of R32 while Rb6 Th6 (WO4 )14 O stabilizes in P$\bar 6$2c. The high-temperature phase transition was observed in Rb6 Th6 (WO4 )14 O and investigated using high-temperature PXRD technique. The results demonstrate a very unusual thermal behavior of this compound. The Raman and IR spectra of both phases were analyzed with respect to their complex structures.

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Insights into Structural Diversity and Morphotropic Evolution in A₄Th(WO₄)₄ (A=Li, Na, K, Rb and Cs) Family

Yu,

Xiao,

Eichel

et al. 2024

Chemistry A European J

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A series of four new thorium tungstates, A4Th(WO4)4 (A = Li, K, Rb, Cs), were synthesized using high‐temperature solid‐state method. Structural studies of the materials reveal distinct structural changes with underlying similarities influenced by the nature of A‐site cations. Li4Th(WO4)4 exhibits a two‐dimensional corrugated sheet structure stabilized by Li+ cations, crystallizing in P space group. K4Th(WO4)4 crystallizes in I41/a space group and exhibits a three‐dimensional framework consisting of ThO8 antiprisms and WO4 tetrahedra. Rb4Th(WO4)4 forms in C2/c space group, showcasing a framework with two‐dimensional sheet structure. Cs4Th(WO4)4 is isostructural to Rb4Th(WO4)4 but displays increased interlayer spacing due to the larger ionic radius of Cs. Raman spectroscopy confirms the structural data, revealing distinct vibrational modes that correlate with tungsten coordination changes from WO6 in Li4Th(WO4)4 to WO4 in the Cs4Th(WO4)4. This study demonstrates how variation of alkali metals affects the structural properties of thorium tungstates series, showing a morphotropic evolution as a factor of the ionic radii of the alkali metals.

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Structural and thermal studies on Na2Th(MoO4)3, Na2Pu(MoO4)3, Na4Th(MoO4)4 and Na4Pu(MoO4)4

Cited by 25 publications

References 7 publications

Structural and thermal studies on Na2U(MoO4)3 and Na4U(MoO4)4

Structural and thermal studies on Na2U(MoO4)3 and Na4U(MoO4)4

Dinuclear Face‐Sharing Bi‐octahedral Tungsten(VI) Core and Unusual Thermal Behavior in Complex Th Tungstates

Insights into Structural Diversity and Morphotropic Evolution in A₄Th(WO₄)₄ (A=Li, Na, K, Rb and Cs) Family

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Structural and thermal studies on Na2Th(MoO4)3, Na2Pu(MoO4)3, Na4Th(MoO4)4 and Na4Pu(MoO4)4

Cited by 25 publications

References 7 publications

Structural and thermal studies on Na2U(MoO4)3 and Na4U(MoO4)4

Structural and thermal studies on Na2U(MoO4)3 and Na4U(MoO4)4

Dinuclear Face‐Sharing Bi‐octahedral Tungsten(VI) Core and Unusual Thermal Behavior in Complex Th Tungstates

Insights into Structural Diversity and Morphotropic Evolution in A4Th(WO4)4 (A=Li, Na, K, Rb and Cs) Family

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Product

Resources

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Insights into Structural Diversity and Morphotropic Evolution in A₄Th(WO₄)₄ (A=Li, Na, K, Rb and Cs) Family