CsVO
            2
            F(IO
            3
            ): An Excellent SHG Material Featuring an Unprecedented 3D [VO
            2
            F(IO
            3
            )]
            −
            Anionic Framework

ABSTRACTWe present the structure and thermoelectric properties of the new quaternary selenides K1+xM4–2xBi7+xSe15 (M = Sn, Pb) and K1-xSn5-xBi11+xSe22. The compounds K1+xM4-2xBi7+xSe15 (M= Sn, Pb) crystallize isostructural to A1+xPb4-2xSb7+xSe15 with A = K, Rb, while K1-xSn5-xBi11+xSe22 reveals a new structure type. In both structure types fragments of the Bi2Te3-type and the NaCl-type are connected to a three-dimensional anionic framework with K+ ions filled tunnels. The two structures vary by the size of the NaCl-type rods and are closely related to β-K2Bi8Se13 and K2.5Bi8.5Se14. The thermoelectric properties of K1+xM4-2xBi7+xSe15 (M = Sn, Pb) and K1-xSn5-xBi11+xSe22 were explored on single crystal and ingot samples. These compounds are narrow gap semiconductors and show n-type behavior with moderate Seebeck coefficients. They have very low thermal conductivity due to an extensive disorder of the metal atoms and possible “rattling” K+ ions.

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ChemInform Abstract: A New Type of Mixed Anionic Framework in Microporous Rubidium Copper Vanadyl(V) Phosphate, Rb2Cu(VO2)2(PO4)2.

ChemInform ◽

10.1002/chin.200844008 ◽

2008 ◽

Vol 39 (44) ◽

Author(s):

Olga V. Yakubovich ◽

Ian M. Steele ◽

Olga V. Dimitrova

Keyword(s):

New Type ◽

Anionic Framework

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Proton-Stabilized Three-Dimensional Anionic Framework in H[Zn6O2(BO3)3].

ChemInform ◽

10.1002/chin.200715007 ◽

2007 ◽

Vol 38 (15) ◽

Author(s):

Werner Massa ◽

Olga V. Yakubovich ◽

Olga V. Dimitrova

Keyword(s):

Three Dimensional ◽

Anionic Framework

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Synthesis and crystal structure of the salt Na6[(PhSiO1.5)2Co3O6]·7H2O containing a cobaltasiloxane anionic framework

Journal of Organometallic Chemistry ◽

10.1016/0022-328x(88)80284-5 ◽

1988 ◽

Vol 347 (1-2) ◽

pp. 253-267 ◽

Cited By ~ 16

Author(s):

Yu.E. Ovchinnikov ◽

V.E. Shklover ◽

Yu.T. Struchkov ◽

M.M. Levitsky ◽

A.A. Zhdanov

Keyword(s):

Crystal Structure ◽

Synthesis And Crystal Structure ◽

Anionic Framework

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A new three-dimensional anionic cadmium(II) dicyanamide network

Acta Crystallographica Section C Structural Chemistry ◽

10.1107/s2053229614022360 ◽

2014 ◽

Vol 70 (11) ◽

pp. 1054-1056 ◽

Cited By ~ 9

Author(s):

Qiang Li ◽

Hui-Ting Wang

Keyword(s):

Crystal Structure ◽

Aqueous Solution ◽

Unit Cell Volume ◽

Three Dimensional ◽

Building Blocks ◽

The Other ◽

Dimensional Structure ◽

Cadmium Nitrate ◽

Nitrate Tetrahydrate ◽

Anionic Framework

A new cadmium dicyanamide complex, poly[tetramethylphosphonium [μ-chlorido-di-μ-dicyanamido-κ4N1:N5-cadmium(II)]], [(CH3)4P][Cd(NCNCN)2Cl], was synthesized by the reaction of tetramethylphosphonium chloride, cadmium nitrate tetrahydrate and sodium dicyanamide in aqueous solution. In the crystal structure, each CdIIatom is octahedrally coordinated by four terminal N atoms from four anionic dicyanamide (dca) ligands and by two chloride ligands. The dicyanamide ligands play two different roles in the building up of the structure; one role results in the formation of [Cd(dca)Cl]2building blocks, while the other links the building blocks into a three-dimensional structure. The anionic framework exhibits a solvent-accessible void of 673.8 Å3, amounting to 47.44% of the total unit-cell volume. The cavities in the network are occupied by pairs of tetramethylphosphonium cations.

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Structural characterization of quaternary selenites of tungsten(VI), A 2W3SeO12 (A = NH4, Cs, Rb, K or Tl)

Acta Crystallographica Section E Crystallographic Communications ◽

10.1107/s2056989021002735 ◽

2021 ◽

Vol 77 (4) ◽

pp. 406-411

Author(s):

Vineela Balisetty ◽

Kanamaluru Vidyasagar

Keyword(s):

Three Dimensional ◽

Spectroscopic Studies ◽

Solid State Reactions ◽

Dimensional Structure ◽

X Ray Diffraction ◽

Compound K ◽

Three Dimensional Structure ◽

Thermal And Spectroscopic Studies ◽

Anionic Framework

The quaternary A 2W3SeO12 (A = NH4, Cs, Rb, K or Tl) selenites have been prepared in the form of single crystals by hydrothermal and novel solid-state reactions. They were characterized by X-ray diffraction, thermal and spectroscopic studies. All of them have a hexagonal tungsten oxide (HTO) related [W3SeO12]2− anionic framework with pyramidally coordinated Se4+ ions. The known A 2W3SeO12 (A = NH4, Cs or Rb) compounds are isostructural with the Cs2W3TeO12 compound and have a non-centrosymmetric layered structure containing intra-layer Se—O bonds. The new compound K2W3SeO12(α) is isostructural with the K2W3TeO12 compound and has a centrosymmetric three-dimensional structure containing interlayer Se—O bonds. It is inferred that the new Tl2W3SeO12 compound has the same three-dimensional structure as K2W3SeO12(α).

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