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Perlite
Expanded volcanic glass
Perlite is an aluminum potassium sodium silicate mineral of volcanic origin. It is available as a grey to white powder or granular material. In ceramics it is often used as an aggregate material to improve drying properties, reduce the weight, or add texture to clay bodies for use in making large forms.
Perlite has a wide range of chemistries, the one shown here is an example. However the chemistry of this material is not normally a factor in the reason for its use.
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XML for Import into INSIGHT
<?xml version="1.0" encoding="UTF-8"?>
<material name="Perlite" descrip="Expanded volcanic glass" searchkey="" loi="0.00" casnumber="130885-09-5">
<oxides>
<oxide symbol="CaO" name="Calcium Oxide, Calcia" status="" percent="1.000" tolerance=""/>
<oxide symbol="MgO" name="Magnesium Oxide, Magnesia" status="" percent="0.500" tolerance=""/>
<oxide symbol="K2O" name="Potassium Oxide" status="" percent="4.000" tolerance=""/>
<oxide symbol="Na2O" name="Sodium Oxide, Soda" status="" percent="3.500" tolerance=""/>
<oxide symbol="Al2O3" name="Aluminum Oxide, Alumina" status="" percent="13.500" tolerance=""/>
<oxide symbol="SiO2" name="Silicon Dioxide, Silica" status="" percent="72.500" tolerance=""/>
<oxide symbol="Fe2O3" name="Iron Oxide, Ferric Oxide" status="" percent="1.000" tolerance=""/>
</oxides>
<volatiles>
<volatile symbol="LOI" name="Loss on Ignition" percent="4.000" tolerance=""/>
</volatiles>
</material>
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