B Clay
Buff Firing Stoneware Clay
Chemistry
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Volatiles
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Mineralogy
- Quartz: 41%
- Smectite: 8%
- Muscovite: 25%
- Kaolinite: 25%
Links to Other Materials
- A3 Stoneware Clay - Related
- Cache
Miscellaneous
- Family: Clay Other
- Region: North America
- Mined At:
- Raw Mineral: No
- Generic: No
Notes
High temperature clean buff firing stoneware clay mined at Ravenscrag, Sask.
Analysis updated July 97.
There is some argument whether the mineralogy should be muscovite or illite. Here is the comment of one technician: "With regards to illite or muscovite, the only way to categorically
differentiate between the two is to determine the layer charge (most easily by electron microscopy) which I didn't do. In this sample, the mica component has no detectable expandability which suggests a high charge mica with very little depotassification typical of muscovites. Also, the x-ray scattering domain size is quite large with minimal disorder which you seldom find in illite but expected for muscovite. However, the kaolinite in the sample is extremely fine as one would see in fireclays. 41% quartz in the sample is accurate. You can easily verify this from your chemistry by checking the contributions of muscovite, kaolinite, smectite and K-spar to the total SiO2, and constraining potassium to
muscovite and K-spar, and Mg to smectite. From my experience, a high plasticity and the apparent illitic properties that you see in the clay is most likely due to the discrete smectite content (8%). Note that the activity of smectite is several orders of magnitude (up to 10 times) greater than the finest kaolinite or illite."
424 Ba ppm
34 Sr pmm
24 Y ppm
10 Sc ppm
249 Zr ppm
1 Be ppm
65 V ppm
Pre 2006 Analysis:
CaO 0.17
K2O 2.2
MgO 0.53
Na2O 0.11
TiO2 0.57
Al2O3 15.42
P2O5 0.02
SiO2 71.94
Fe2O3 1.17
MnO 0.01
URLs
- Data Sheet - http://digitalfire.com/plainsman/data/bclay.htm
Suppliers
- Plainsman Clays
Authors
- Tony Hansen (Owner)
XML
<?xml version="1.0" encoding="UTF-8"?>
<material name="B Clay" descrip="Buff Firing Stoneware Clay" generic="0" rawmineral="0" searchkey="3B, PR#3 B" loi="6.50">
<families>
<family name="Clay Other"/>
</families>
<regions>
<region name="North America" minedat="East End, Saskatchewan"/>
</regions>
<oxides>
<oxide symbol="CaO" name="Calcium Oxide, Calcia" status="" percent="0.240" tolerance=""/>
<oxide symbol="MgO" name="Magnesium Oxide, Magnesia" status="" percent="0.600" tolerance=""/>
<oxide symbol="K2O" name="Potassium Oxide" status="" percent="2.700" tolerance=""/>
<oxide symbol="Na2O" name="Sodium Oxide, Soda" status="" percent="0.100" tolerance=""/>
<oxide symbol="P2O5" name="Phosphorus Pentoxide" status="" percent="0.020" tolerance=""/>
<oxide symbol="TiO2" name="Titanium Dioxide, Titania" status="" percent="0.700" tolerance=""/>
<oxide symbol="Al2O3" name="Aluminum Oxide, Alumina" status="" percent="17.700" tolerance=""/>
<oxide symbol="SiO2" name="Silicon Dioxide, Silica" status="" percent="67.800" tolerance=""/>
<oxide symbol="Fe2O3" name="Iron Oxide, Ferric Oxide" status="" percent="1.300" tolerance=""/>
<oxide symbol="MnO" name="Manganous Oxide" status="" percent="0.010" tolerance=""/>
</oxides>
<volatiles>
<volatile symbol="" name="" percent="6.500" tolerance="100-1000C"/>
<volatile symbol="" name="" percent="0.100" tolerance=""/>
</volatiles>
<references>
<reference name="seealso" reason=""/>
</references>
<minerals>
<mineral name="Quartz" detail="41%"/>
<mineral name="Smectite" detail="8%"/>
<mineral name="Muscovite" detail="25%"/>
<mineral name="Kaolinite" detail="25%"/>
</minerals>
<suppliers>
<supplier name="Plainsman Clays" country="CA" url="http://www.plainsmanclays.com" label=""/>
</suppliers>
<notes>
<note>High temperature clean buff firing stoneware clay mined at Ravenscrag, Sask.
Analysis updated July 97.
There is some argument whether the mineralogy should be muscovite or illite. Here is the comment of one technician: "With regards to illite or muscovite, the only way to categorically
differentiate between the two is to determine the layer charge (most easily by electron microscopy) which I didn\'t do. In this sample, the mica component has no detectable expandability which suggests a high charge mica with very little depotassification typical of muscovites. Also, the x-ray scattering domain size is quite large with minimal disorder which you seldom find in illite but expected for muscovite. However, the kaolinite in the sample is extremely fine as one would see in fireclays. 41% quartz in the sample is accurate. You can easily verify this from your chemistry by checking the contributions of muscovite, kaolinite, smectite and K-spar to the total SiO2, and constraining potassium to
muscovite and K-spar, and Mg to smectite. From my experience, a high plasticity and the apparent illitic properties that you see in the clay is most likely due to the discrete smectite content (8%). Note that the activity of smectite is several orders of magnitude (up to 10 times) greater than the finest kaolinite or illite."
424 Ba ppm
34 Sr pmm
24 Y ppm
10 Sc ppm
249 Zr ppm
1 Be ppm
65 V ppm
Pre 2006 Analysis:
CaO 0.17
K2O 2.2
MgO 0.53
Na2O 0.11
TiO2 0.57
Al2O3 15.42
P2O5 0.02
SiO2 71.94
Fe2O3 1.17
MnO 0.01
</note>
</notes>
</material>
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