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Mg5TiO4(BO3)2.

Tetsuya Kawano¹, Hisanori Yamane

¹Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, 980-8577, Japan.

Acta Crystallographica. Section C, Crystal Structure Communications

|October 6, 2010

Summary

Researchers synthesized single crystals of pentamagnesium titanium(IV) tetraoxide bis(borate), Mg(5)TiO(4)(BO(3))(2), a novel material isostructural with the mineral ludwigite. The crystal structure features connected octahedra forming zigzag layers and triangular prismatic tunnels.

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Area of Science:

Solid-state chemistry
Crystallography
Materials science

Background:

The mineral ludwigite, with the general formula (Mg,Fe)2(Fe,Mg)BO3(O,OH), is a known borate mineral.
Understanding the structure and properties of related magnesium-titanium borates can provide insights into new materials.

Purpose of the Study:

To synthesize and characterize single crystals of pentamagnesium titanium(IV) tetraoxide bis(borate), Mg(5)TiO(4)(BO(3))(2).
To determine the crystal structure and atomic arrangement of this new compound.
To compare its structure with the known mineral ludwigite.

Main Methods:

Single crystals were prepared by slow cooling of the melt at 1623 K in air.
Crystal structure determination was performed based on atomic positions and coordination.

Main Results:

Single crystals of Mg(5)TiO(4)(BO(3))(2) were successfully synthesized.
The compound is isostructural with the mineral ludwigite.
Mg and Ti atoms are six-coordinated by oxygen, while B atoms are three-coordinated.
The structure consists of zigzag folding layers of MgO(6) and (Ti/Mg)O(6) octahedra connected by edge sharing.
Triangular prismatic tunnels are formed between these layers.

Conclusions:

The successful synthesis and structural determination of Mg(5)TiO(4)(BO(3))(2) expand the known family of ludwigite-related compounds.
The detailed crystal structure provides a basis for understanding the physical and chemical properties of this new material.
The formation of tunnels within the crystal structure suggests potential applications in areas like ion conduction or catalysis.