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Pioneer 2661 Talc

White Texas Talc

Alternate Names: Pioneer Ceramic Talc, Pioneer Talc, Pioneer 2882

Oxide Weight110.21
Formula Weight123.83
If this formula is not unified correctly please contact us.

Now called AmTalc
Texas Talc has a darker grey raw color and a rounder fluffier particle than other talcs. However it fires very white and is desired for its consistency. It is commonly used in ceramic slurries for low temperature greenware. Pioneer talcs are non-asbestiform.

Various grades are available.

Acid Solubles: 2-4
pH: 9.5
LOI: 11.5
Water Solubles: -.1
Dry Brightness: 58-65
Dry Brightness after firing: 88+
Specific gravity: 2.7
Tapped Density: 75-85 lbs/ft3
Loose Density: 35-45 "
One Lb. Bulks, Gallons: .04
Shrinkage: 0.60
Oil Absorption: 32
Hegman Fineness: 1.0

Thru 200 mesh, %: 97.0
Thru 325 mesh, %: 85.0
Median Particle Size: 19.0 microns

2882 Talc is the same except:
Fe2O3: < .69
Dry Brightness: 62.0

Pioneer 1599 is a platy Texas general purpose industrial talc.

Texas talc (left) and Montana talc (right)

Texas talc (left) and Montana talc (right)

Texas talc contains some amorphous carbon. The carbon is not stand-alone, but as CO2 in the dolomitic part of the ore. It produces 7% LOI between 750-850C.

Permeability demonstration of two talcs

Permeability demonstration of two talcs

Texas talc (left) quickly absorbs all the water poured on it. Montana talc (right) resists whetting of the particles much more, the water is just sitting on top and has not penetrated at all.

Out Bound Links

In Bound Links

By Tony Hansen

XML for Import into INSIGHT

<?xml version="1.0" encoding="UTF-8"?> <material name="Pioneer 2661 Talc" descrip="White Texas Talc" searchkey="Pioneer Ceramic Talc, Pioneer Talc, Pioneer 2882" loi="0.00" casnumber="14807-96-6"> <oxides> <oxide symbol="CaO" name="Calcium Oxide, Calcia" status="" percent="3.500" tolerance=""/> <oxide symbol="MgO" name="Magnesium Oxide, Magnesia" status="" percent="29.500" tolerance=""/> <oxide symbol="K2O" name="Potassium Oxide" status="" percent="0.300" tolerance=""/> <oxide symbol="TiO2" name="Titanium Dioxide, Titania" status="" percent="0.100" tolerance=""/> <oxide symbol="Al2O3" name="Aluminum Oxide, Alumina" status="" percent="0.500" tolerance=""/> <oxide symbol="SiO2" name="Silicon Dioxide, Silica" status="" percent="53.500" tolerance=""/> <oxide symbol="Fe2O3" name="Iron Oxide, Ferric Oxide" status="" percent="0.500" tolerance=""/> </oxides> <volatiles> <volatile symbol="LOI" name="Loss on Ignition" percent="11.000" tolerance=""/> </volatiles> </material>

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