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Halloysite

Halloysite is a relatively rare natural form of kaolinite, appreciated by high-end tableware manufacturers over the world for the high-whiteness and translucent qualities it confers.

Halloysite

KEY FIGURES

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USING HALLOYSITE FOR FINE TABLEWARE FABRICATION

Halloysite is a natural form of very white, kaolinite. 

Like kaolinite, halloysite is an aluminosilicate, however it has a tubular crystal structure, which is markedly different from the booklet or platelet crystal structure of kaolinite.

Halloysite and kaolinite are ubiquitous in soil and weathered rock, where they occur in a variety of particle shapes. They typically form through the hydrothermal alteration of aluminosilicate minerals and can occur intermixed with other minerals in Kaolin rocks. Large halloysite specific deposits are relatively rare, however.

Due to its high whiteness, high aspect ratio and nanosize halloysite is particularly sought after by ceramic tableware producers for its translucent effect in fine porcelain and bone china. The tubular shape also helps prevent sag before firing. 

Halloysite is also traditionally used as a carrier in cosmetics and pharmaceuticals, a filler in plastics, particularly PVC, and as a suspension agent in paints, inks and filters.

Our Matauri Bay Quarry, New Zealand
Our Matauri Bay Quarry mineral excavator, New Zealand
Our Mahi-Mahi Quarry and ongoing mineral extraction, New Zealand
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Halloysite is an aluminosilicate clay mineral with the same chemical formula as kaolin Al2Si2O5(OH)4 2H2O but with water (H2O) intercalated in its clay structure.

PHYSICAL PROPERTIES

  • High whiteness
  • High translucency
  • Tubular structure
  • Nanosize
  • High aspect ratio
  • Low iron and titanium content
A Halloysite rock
Halloysite in powder
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SERVING THE MOST PRESTIGIOUS BRANDS

Imerys operates a high-value, high-purity halloysite deposit in New Zealand producing consistent quality aluminous halloysite with low levels of iron oxide to serve the ceramics industry.  

Our customers include some of the most prestigious brands of porcelain and bone china tableware worldwide.

A BENCHMARK FOR FINE TABLEWARE

Imerys halloysites are prized for the manufacture of thin porcelain, bone china, fine china and aluminous tableware where the combination of tubular shape and low iron and titanium content produces fine ceramic ware presenting exceptional whiteness and translucency. 

Its fine particle size also makes halloysite a useful suspension agent in glaze preparations.

This tableware is made with Halloysite

This tableware is made with Halloysite

Imerys halloysites from our New Zealand deposit are recognized across the world for their high purity. We will continue to process our halloysite products for ceramics to provide a high level of consistency that our customers can depend on.

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