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A1 Ball Clay

PR#3 A1, Pyritic bentonitic ball clay

Oxide Weight475.55
Formula Weight550.41
If this formula is not unified correctly please contact us.

A1 is mined by Plainsman Clays in southern Saskatchewan, Canada. It is at the top of the whitemud formation just under the Battle formation. It is the dirtiest clay they use (highest in iron stone concretions and soluble iron salts).

A1 is a heavily stained bentonitic ball clay with pyrite particles. This material is useful in high temperature reduction brown or red burning clay bodies to impart plasticitY, iron speckle and variations in fired surface character. It is normally not used in quantities above 10%.

Ravenscrag Saskatchewan clays fired at cone 10R (top) and at cone 10R with glaze (bottom): A1, A2, A3, 3B, 3C, 3D. The bottom row has also shows solubles salts (SOLU test).

Plainsman A1 firing test bars

Plainsman A1 firing test bars

Cone 10 reduction (top), 11 down to 9 oxidation below. The dark color is partly from iron bearing soluble salts that are left on the surface after drying.

Out Bound Links

In Bound Links

By Tony Hansen

XML for Import into INSIGHT

<?xml version="1.0" encoding="UTF-8"?> <material name="A1 Ball Clay" descrip="PR#3 A1, Pyritic bentonitic ball clay" searchkey="" loi="0.00" casnumber="70694-09-6"> <oxides> <oxide symbol="CaO" name="Calcium Oxide, Calcia" status="" percent="0.730" tolerance=""/> <oxide symbol="MgO" name="Magnesium Oxide, Magnesia" status="" percent="0.880" tolerance=""/> <oxide symbol="K2O" name="Potassium Oxide" status="" percent="0.700" tolerance=""/> <oxide symbol="Na2O" name="Sodium Oxide, Soda" status="" percent="0.050" tolerance=""/> <oxide symbol="P2O5" name="Phosphorus Pentoxide" status="" percent="0.400" tolerance=""/> <oxide symbol="TiO2" name="Titanium Dioxide, Titania" status="" percent="0.800" tolerance=""/> <oxide symbol="Al2O3" name="Aluminum Oxide, Alumina" status="" percent="18.300" tolerance=""/> <oxide symbol="SiO2" name="Silicon Dioxide, Silica" status="" percent="59.300" tolerance=""/> <oxide symbol="Fe2O3" name="Iron Oxide, Ferric Oxide" status="" percent="4.070" tolerance=""/> <oxide symbol="MnO" name="Manganous Oxide" status="" percent="0.090" tolerance=""/> </oxides> <volatiles> <volatile symbol="LOI" name="Loss on Ignition" percent="13.600" tolerance=""/> </volatiles> </material>

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