β-K3Fe(MoO4)2Mo2O7

Souilem, Amira; Zid, Mohamed Faouzi; Driss, Ahmed

doi:10.1107/s1600536814013087

Cited by 3 publications

(2 citation statements)

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“…A 3 Fe[MoO 4 ] 2 [Mo 2 O 7 ] with A=K,Cs. [6][7][8] In general, [X 2 O 7 ] nÀ anions preferentially exist in a bent and staggered conformation, which has been extensively studied for the family of disilicates. [9] For X=P, [10,11] Cr, [12,13] V [13] and Ge [14] the different conformations D 3d , D 3h , and C 2v , respectively, were controversially discussed in terms of structural symmetry in relation to spectroscopic assignments of fundamental modes (IR/Raman).…”

Section: Introductionmentioning

confidence: 99%

Configuration of the dimolybdate in salt inclusion type of compounds, Cs₂Mo₂O₇ ⋅ CsX (X=Cl, Br, and I)

Weber,

Denisova,

Lemmens

et al. 2023

Zeitschrift anorg allge chemie

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Cs2Mo2O7·CsI is obtained as a member of the series Cs2Mo2O7·CsX with X = Cl, Br, and I from the synthesis of Cs2MoO4 with MoO3 and CsX. At room temperature, the compounds crystallize in the space group P63/mmc with the dimolybdate, [Mo2O7]2‐, in a linear and eclipsed conformation. Low temperature Raman spectroscopy and low temperature X‐ray diffraction were used to investigate the effect of the [[EQUATION]]CsX} hetero‐honeycomb lattice on the bridging angle of the dimolybdate. For X = Cl, a phase transition occurs below 150 K (P63/mmc → Cmcm). The phase transition relates to a lock‐in that involves bending of the (Mo−O−Mo) bridge. For the Pearson softer iodide compound, no phase transition is observed down to 4 K; thus, the linear configuration remains stable. Specific heat data and their evaluation in terms of phonon contributions are given.

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Section: Introductionmentioning

confidence: 99%

Configuration of the dimolybdate in salt inclusion type of compounds, Cs₂Mo₂O₇ ⋅ CsX (X=Cl, Br, and I)

Weber,

Denisova,

Lemmens

et al. 2023

Zeitschrift anorg allge chemie

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“…Interesting aspects of the A 2 MoO 4 ·MoO 3 series are that they exhibit low melting points (below 600 °C) and increasing electrical/ionic conductivity (1D diffusion of O 2– ) with the A-cation size . In contrast to the crystalline phase A 2 MoO 4 ·MoO 3 , ,,, discrete [Mo 2 O 7 ] 2– anions exist in the liquid state of K 2 MoO 4 ·MoO 3 . , In the presence of Fe III , for example, α- and β-K 3 Fe[MoO 4 ] 2 [Mo 2 O 7 ] , can be obtained. For A = Cs and iron, mostly complex ortho-molybdates CsFe(MoO 4 ) 2 , and Cs 2 Fe 2 (MoO 4 ) 3 , Cs 4 Fe(MoO 4 ) 3 , or CsFe 5 (MoO 4 ) 7 are reported.…”

Section: Introductionmentioning

confidence: 99%

Reactivity of FeMoO₄ in CsCl Fluxes and Formation of the Salt-Inclusion Type of Compounds

2022

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The reactivity of FeMoO 4 in CsCl fluxes has been investigated by thermal analysis and chemical reactions in evacuated silica ampules. The products have been characterized by ex situ X-ray diffraction methods. Metathesis reactions involving CsCl lead to the formation of Cs 2 Fe 2 (MoO 4 ) 3 and the salt adduct Cs 2 FeCl 4 •CsCl. A side reaction has been observed, which is associated with a decomposition of [MoO 4 ] 2− in CsCl fluxes yielding Cs 2 Mo 2 O 7 •CsCl, which contains the rare pyromolybdate anion, [Mo 2 O 7 ] 2− , located in the center of a ∞ 2 [CsCl] heterohoneycomb arrangement. This salt-inclusion type of compound has been studied further in terms of its formation starting from Cs 2 MoO 4 , MoO 3 , and CsCl. The intermediate adduct phase, Cs 2 MoO 4 •MoO 3 , contains uncharged ∞ 1 [MoO 2 O 2/2 ] chains that react with CsCl at elevated temperatures to Cs 2 Mo 2 O 7 •CsCl.Furthermore, the site preference for alkaline-metal cations (K + , Rb + , and Cs + ) has been evaluated for a mixed substitution series. In accordance with the Pearson concept, the polarizability of the respect cation outweighs any size differences for the occupancy of the salt-intergrowth motif, the honeycomb part of the structure.

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ChemInform Abstract: β‐K₃Fe (MoO₄)₂Mo₂O₇.

2014

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β-K₃Fe(MoO₄)₂Mo₂O₇

Abstract: Key indicators: single-crystal X-ray study; T = 298 K; mean (Fe-O) = 0.005 Å; disorder in main residue; R factor = 0.029; wR factor = 0.076; data-to-parameter ratio = 13.0. Related literature

Cited by 3 publications

References 18 publications

Configuration of the dimolybdate in salt inclusion type of compounds, Cs₂Mo₂O₇ ⋅ CsX (X=Cl, Br, and I)

Configuration of the dimolybdate in salt inclusion type of compounds, Cs₂Mo₂O₇ ⋅ CsX (X=Cl, Br, and I)

Reactivity of FeMoO₄ in CsCl Fluxes and Formation of the Salt-Inclusion Type of Compounds

ChemInform Abstract: β‐K₃Fe (MoO₄)₂Mo₂O₇.

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β-K3Fe(MoO4)2Mo2O7

Abstract: Key indicators: single-crystal X-ray study; T = 298 K; mean (Fe-O) = 0.005 Å; disorder in main residue; R factor = 0.029; wR factor = 0.076; data-to-parameter ratio = 13.0. Related literature

Cited by 3 publications

References 18 publications

Configuration of the dimolybdate in salt inclusion type of compounds, Cs2Mo2O7 ⋅ CsX (X=Cl, Br, and I)

Configuration of the dimolybdate in salt inclusion type of compounds, Cs2Mo2O7 ⋅ CsX (X=Cl, Br, and I)

Reactivity of FeMoO4 in CsCl Fluxes and Formation of the Salt-Inclusion Type of Compounds

ChemInform Abstract: β‐K3Fe (MoO4)2Mo2O7.

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β-K₃Fe(MoO₄)₂Mo₂O₇

Configuration of the dimolybdate in salt inclusion type of compounds, Cs₂Mo₂O₇ ⋅ CsX (X=Cl, Br, and I)

Configuration of the dimolybdate in salt inclusion type of compounds, Cs₂Mo₂O₇ ⋅ CsX (X=Cl, Br, and I)

Reactivity of FeMoO₄ in CsCl Fluxes and Formation of the Salt-Inclusion Type of Compounds

ChemInform Abstract: β‐K₃Fe (MoO₄)₂Mo₂O₇.