Halloysite is an industrial mineral that is part of the kaolinite group. Like kaolin, halloysite is essentially composed of alumina-silicates, however it has a hollow tubular crystal structure, which is markedly different from the booklet or platelet crystal structure of kaolin.

A typical chemical analysis is: 

• Loss on Ignition   13.8
• SiO_²      50.4
• Al_²O_³     35.5
• Fe_²O_³     .25
• TiO_²     .05
• CaO   Trace
• MgO   Trace
• K_²O   Trace
• Na_²O   Trace
  

GRIT.  . . . . .Less than 0.10 per cent on a 240 mesh BSS Screen for dispersed solution.
COLOUR. . . . . . . . Brightness typically 98.9 L* as measeured by a Minolta CR300 Colorimeter using D65 Light source..  Fired at 1280°C
pH OF AQUEOUS SLURRY AT 20 PER CENT SOLIDS. . . . 3.5 - 4.5
SPECIFIC GRAVITY . . . . . . . .2.55
FLUORIDE ION . . . . Less than 0.01% as F¯ (B.C.R.A.)
CATION EXCHANGE CAPACITY . . . . . . . . .Approximately 10 milli equivalents  100 gms of Clay
SURFACE AREA. . . . .Approximately 20 m²/gm
DISPERSIBILITY..........For ceramic applications the clay needs to be either ball milled or blunged under high shear.

" Every precaution is taken in production to ensure the clays conform to the above data but as the products are based on naturally occuring raw materials, minor variations may occur."

Because of Trumps Import duties all prices are subject to change. Price in our Store is Correct.