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Updated: Jun 1, 2026

Simultaneous Multi-surface Anodizations and Stair-like Reverse Biases Detachment of Anodic Aluminum Oxides in Sulfuric and Oxalic Acid Electrolyte

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NaAg(2)Mo(3)O(9)AsO(4).

Hamadi Hamza¹, Mohamed Faouzi Zid, Ahmed Driss

¹Laboratoire de Matériaux et Cristallochimie, Faculté des Sciences de Tunis, Université de Tunis El Manar, 2092 Manar II Tunis, Tunisia.

Acta Crystallographica. Section E, Structure Reports Online

|May 19, 2011

Summary

Researchers synthesized sodium disilver arsenatotrimolybdate, a novel material featuring anionic ribbons and metal cation disorder. This compound exhibits weak ionic conductivity, offering insights into related quaternary systems.

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Synthesis and Characterization of Functionalized Metal-organic Frameworks

Synthesis and Characterization of Functionalized Metal-organic Frameworks

Published on: September 5, 2014

Area of Science:

Solid-state chemistry
Inorganic materials science
Crystal structure analysis

Background:

Quaternary systems involving transition metals, pnictogens, and oxygen are crucial for developing new materials.
Understanding the structural and electronic properties of mixed-metal polyoxometalates is essential for materials discovery.

Purpose of the Study:

To synthesize and characterize a novel quaternary compound, sodium disilver arsenatotrimolybdate.
To elucidate the crystal structure and cation distribution within the compound.
To investigate the ionic conductivity and structural relationships with related materials.

Main Methods:

Solid-state reaction for synthesis.
X-ray crystallography for structure determination.
Analysis of cation distribution and coordination environments.

Main Results:

The crystal structure of Na(0.93(1))Ag(2.07(1))Mo(3)AsO(13) was determined, revealing anionic [Mo(3)AsO(13)](n) ribbons.
Isolated arsenate tetrahedra share corners with edge-sharing molybdate octahedra.
Metal sites exhibit occupational disorder with varying Ag:Na ratios; cations are coordinated by oxygen atoms in distorted MO(7) polyhedra.
Weak ionic conductivity was observed.

Conclusions:

The synthesis and structural characterization of sodium disilver arsenatotrimolybdate provide new insights into polyoxometalate structures.
The observed cation disorder and ribbon-like structure are key features influencing the material's properties.
Structural relationships within M-Sb-P-O, M-Nb-P-O, and M-Mo-As-O systems (M = Ag, alkali metal) were discussed, highlighting broader implications for materials design.