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Why Halloysite?

The importance of Halloysite

The mineral takes the form of small hollow tubes, known as nanotubes. This shape gives it unique properties and a wide variety of industrial uses beyond the more common kaolinite, particularly in the emerging fields of batteries and nano-technology. This potential application of the natural halloysite nano-clay has been demonstrated by an all-solid-state lithium-sulfur battery over a wide temperature range of 25–100 °C. These results reveal the possibility of realizing sustainable high energy storage at a reduced cost.

Halloysite’s tubular microstructure – naturally occurring hollow nanotubes that are imperceptible to the human eye — make halloysite a unique mineral with highly desirable properties. Features such as a high surface area to unit weight ratio, high porosity and differential charge capabilities between inner and outer surfaces have led researchers to discover its suitability in high-tech processes and end-uses such as carbon capture and conversion, hydrogen storage, water remediation and nanotechnology.

Halloysite Breakdown (1).png

Halloysite's market value

What should get potential investors excited is that halloysite and hybrid halloysite-kaolin is far more valuable than regular kaolin, as well as the scarcity of large, commercial deposits of halloysite nanotubes. Pure halloysite sells for up to US$5,000/tonne, compared to a kaolin/halloysite hybrid, which can be sold for a price between A$500 and A$1,000/tonne, and pure kaolin can sell for A$300/tonne.

Elemental breakdown

Halloysite is an aluminosilicate clay mineral with the empirical formula Al2Si2O5(OH)4. The key constituents are Oxygen (55.78%), Silicon (21.76%), Aluminium (20.90%), and Hydrogen (1.56%). Halloysite is usually formed by hydrothermal adjustment of alumino-silicate minerals.

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