Mt. St. Helens Ash
VOLCANIC ASH
Chemistry
|
Volatiles
|
Miscellaneous
- Family: Flux Source
- Region: None
- Mined At: Unspecified
- Raw Mineral: No
- Generic: No
Notes
Mount St. Helens Ash is available by the grace of the eruption of the above mentioned mountain in Washington State USA about 1980. Large areas of the state were blanketed by a layer of the ash which people had to clear with shovels like snow.
The analysis provided is from the U.S. Dept of Geological Survey.
It has been speculated that P2O5, which shows up in some other analyses that have been done, is responsible for the typical "skin" of color that appears over the body of the glaze.
Atomic Absorption Analysis results 6/9/80
DR Pevear, Dept of Geology, West Washington Univ., Bellingham, WA
1 2 3 4 5 6 7 8 9
SiO2 61.90 66.05 60.81 64.54 62.99 63.46 64.20 65.78 63.92
Al2O3 19.43 18.46 19.69 18.69 17.34 16.62 17.23 16.62 16.31
TiO2 .73 .52 .73 .60 .63 .63 .60 .49 .49
Fe2O3 6.84 4.49 6.97 5.46 5.91 5.57 4.94 4.44 4.59
MgO 3.63 1.78 3.82 2.62 2.74 2.40 1.94 1.69 1.71
MnO .11 .07 .10 .08 .09 .08 .07 .06 .06
CaO 6.05 4.19 6.27 5.56 5.53 5.39 5.12 4.35 4.13
Na2O 4.36 4.59 4.33 4.49 4.21 4.41 4.60 4.62 4.16
K2O 1.06 1.65 .97 1.29 1.23 1.43 1.46 1.63 1.94
LOI .28 .80 .50 .20 n.d. .96 .58 .76 2.04
1 Yakima, WA
2 Spokane, WA
3 Yakima, WA (S34 T9N R5E)
4 Mt. St. Helen (S34 T9N R5E) USGS
5 Mt. St. Helen USGS
6 Randle, WA
7 Castle Rock, WA
8 Missoula, MT
9 Denver, CO
Linked Articles
Volcanic Ash
Joseph Herbert overviews the technical and practical aspects of this interesting group of materials
Suppliers
- VOLCANO
Authors
- Tony Hansen (Owner)
XML
<?xml version="1.0" encoding="UTF-8"?>
<material name="Mt. St. Helens Ash" descrip="VOLCANIC ASH" generic="0" rawmineral="0" searchkey="" loi="1.00">
<families>
<family name="Flux Source"/>
</families>
<oxides>
<oxide symbol="CaO" name="Calcium Oxide, Calcia" status="" percent="6.750" tolerance=""/>
<oxide symbol="MgO" name="Magnesium Oxide, Magnesia" status="" percent="6.100" tolerance=""/>
<oxide symbol="K2O" name="Potassium Oxide" status="" percent="0.366" tolerance=""/>
<oxide symbol="Na2O" name="Sodium Oxide, Soda" status="" percent="3.850" tolerance=""/>
<oxide symbol="TiO2" name="Titanium Dioxide, Titania" status="" percent="0.310" tolerance=""/>
<oxide symbol="Al2O3" name="Aluminum Oxide, Alumina" status="" percent="22.963" tolerance=""/>
<oxide symbol="SiO2" name="Silicon Dioxide, Silica" status="" percent="51.554" tolerance=""/>
<oxide symbol="Fe2O3" name="Iron Oxide, Ferric Oxide" status="" percent="6.831" tolerance=""/>
<oxide symbol="MnO" name="Manganous Oxide" status="" percent="0.275" tolerance=""/>
</oxides>
<volatiles>
<volatile symbol="" name="" percent="1.000" tolerance=""/>
</volatiles>
<suppliers>
<supplier name="VOLCANO" country="" url="" label=""/>
</suppliers>
<notes>
<note>Mount St. Helens Ash is available by the grace of the eruption of the above mentioned mountain in Washington State USA about 1980. Large areas of the state were blanketed by a layer of the ash which people had to clear with shovels like snow.
The analysis provided is from the U.S. Dept of Geological Survey.
It has been speculated that P2O5, which shows up in some other analyses that have been done, is responsible for the typical "skin" of color that appears over the body of the glaze.
Atomic Absorption Analysis results 6/9/80
DR Pevear, Dept of Geology, West Washington Univ., Bellingham, WA
1 2 3 4 5 6 7 8 9
SiO2 61.90 66.05 60.81 64.54 62.99 63.46 64.20 65.78 63.92
Al2O3 19.43 18.46 19.69 18.69 17.34 16.62 17.23 16.62 16.31
TiO2 .73 .52 .73 .60 .63 .63 .60 .49 .49
Fe2O3 6.84 4.49 6.97 5.46 5.91 5.57 4.94 4.44 4.59
MgO 3.63 1.78 3.82 2.62 2.74 2.40 1.94 1.69 1.71
MnO .11 .07 .10 .08 .09 .08 .07 .06 .06
CaO 6.05 4.19 6.27 5.56 5.53 5.39 5.12 4.35 4.13
Na2O 4.36 4.59 4.33 4.49 4.21 4.41 4.60 4.62 4.16
K2O 1.06 1.65 .97 1.29 1.23 1.43 1.46 1.63 1.94
LOI .28 .80 .50 .20 n.d. .96 .58 .76 2.04
1 Yakima, WA
2 Spokane, WA
3 Yakima, WA (S34 T9N R5E)
4 Mt. St. Helen (S34 T9N R5E) USGS
5 Mt. St. Helen USGS
6 Randle, WA
7 Castle Rock, WA
8 Missoula, MT
9 Denver, CO</note>
</notes>
</material>
Much more information with complete interlinking to many related Copyright 2003 http://digitalfire.com, All Rights Reserved Please support http://ceramicmaterials.info to improve this library |  |
INSIGHT is ceramic chemistry |