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Valence Bond Theory

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Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which they are composed. In an attempt to explain the bonding and structure of coordination complexes, Linus Pauling proposed the valence bond theory, or VBT, using the concepts of hybridization and the overlapping of the atomic orbitals. According to VBT, the central metal atom or ion (Lewis acid) hybridizes to provide empty orbitals of suitable...

Properties of Transition Metals

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Transition metals are defined as those elements that have partially filled d orbitals. As shown in Figure 1, the d-block elements in groups 3–12 are transition elements. The f-block elements, also called inner transition metals (the lanthanides and actinides), also meet this criterion because the d orbital is partially occupied before the f orbitals.

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Color in Coordination Complexes
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Periodic Classification of the Elements

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Atomic Layer Deposition of Vanadium Dioxide and a Temperature-dependent Optical Model

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Dineodymium(III) ditungstate(VI), Nd(2)W(2)O(9).

Peter Held¹, Petra Becker

¹Institut für Kristallographie, Universität zu Köln, Zülpicher Strasse 49b, D-50674 Köln, Germany.

Acta Crystallographica. Section E, Structure Reports Online

|January 5, 2011

Summary

Single crystals of neodymium tungsten oxide (Nd(2)W(2)O(9)) were grown using a tungsten borate flux. The study reveals a unique crystal structure featuring chains of [WO(6)] octahedra and a [NdO(9)] polyhedron framework.

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Area of Science:

Solid State Chemistry
Crystallography
Materials Science

Background:

Neodymium tungsten oxides are compounds with potential applications in various fields.
Understanding the crystal structure of these materials is crucial for predicting and tuning their properties.

Purpose of the Study:

To synthesize single crystals of monoclinic Nd(2)W(2)O(9).
To elucidate the detailed crystal structure of Nd(2)W(2)O(9).

Main Methods:

Single crystal growth using tungsten borate flux.
Crystal structure determination via X-ray diffraction (implied).

Main Results:

Successful growth of monoclinic Nd(2)W(2)O(9) single crystals.
The crystal structure comprises chains of distorted [WO(6)] octahedra along the c-axis.
A three-dimensional framework is formed by [NdO(9)] polyhedra connected via common faces and edges.

Conclusions:

The study provides a detailed structural characterization of Nd(2)W(2)O(9).
The unique structural arrangement offers insights into the properties and potential applications of this neodymium tungsten oxide.