Ulexite
sodium calcium borate
Chemistry
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Volatiles
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Links to Other Materials
- Colemanite - Related
- Borax - Related
- Calcium Borate - Related
- Turkish Ulexite - Related
- Chilean Ulexite - Related
- Cache
Miscellaneous
- Family: Flux Source
- Region: None
- Mined At: Unspecified
- Raw Mineral: Yes
- Generic: Yes
Notes
Ulexite is a natural source of boron, it is similar to colemanite. These two minerals are the only practical sources of insoluble boron for glazes (other than frits). It is one of the lowest melting non-lead ceramic minerals, it can form an ultragloss transparent glass at cone 06. Strangely this material does not appear to flux bodies nearly as well as one might expect.
Ulexite is a truly uncommon ceramic mineral in that it contains almost no alumina or silica, it is nothing but fluxing oxides. This mineral forms in very unusual geologic circumstances and can be found in very few places in the world.
The popular mineral Gerstley Borate, used by potters for many decades but now discontinued, is composed partly of ulexite. It was mined in the California desert.
Ulexite is available from Turkey and Chile. It is used in the fiberglass industry as a melter but its potential has never been exploited to any extent in ceramic glazes.
URLs
- The Mineral Ulexite - http://mineral.galleries.com/minerals/carbonat/ulexite/ulexite.htm
- Wikipedia definition - http://en.wikipedia.org/wiki/Ulexite
- Wikipedia definition - http://en.wikipedia.org/wiki/Ulexite
Authors
- Tony Hansen (Owner)
XML
<?xml version="1.0" encoding="UTF-8"?>
<material name="Ulexite" descrip="sodium calcium borate" generic="1" rawmineral="1" searchkey="Television Stone" loi="0.00">
<families>
<family name="Flux Source"/>
</families>
<oxides>
<oxide symbol="CaO" name="Calcium Oxide, Calcia" status="U" percent="11.200" tolerance=""/>
<oxide symbol="Na2O" name="Sodium Oxide, Soda" status="U" percent="6.190" tolerance=""/>
<oxide symbol="B2O3" name="Boric Oxide" status="" percent="34.720" tolerance=""/>
</oxides>
<volatiles>
<volatile symbol="" name="" percent="47.900" tolerance=""/>
</volatiles>
<references>
<reference name="seealso" reason=""/>
<reference name="seealso" reason=""/>
<reference name="seealso" reason=""/>
<reference name="seealso" reason=""/>
<reference name="seealso" reason=""/>
</references>
<notes>
<note>Ulexite is a natural source of boron, it is similar to colemanite. These two minerals are the only practical sources of insoluble boron for glazes (other than frits). It is one of the lowest melting non-lead ceramic minerals, it can form an ultragloss transparent glass at cone 06. Strangely this material does not appear to flux bodies nearly as well as one might expect.
Ulexite is a truly uncommon ceramic mineral in that it contains almost no alumina or silica, it is nothing but fluxing oxides. This mineral forms in very unusual geologic circumstances and can be found in very few places in the world.
The popular mineral Gerstley Borate, used by potters for many decades but now discontinued, is composed partly of ulexite. It was mined in the California desert.
Ulexite is available from Turkey and Chile. It is used in the fiberglass industry as a melter but its potential has never been exploited to any extent in ceramic glazes.</note>
</notes>
</material>
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