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Chilean Ulexite

Description: sodium calcium borate

Oxide Analysis Formula
CaO 13.00% 0.57
MgO 2.50% 0.15
Na2O 7.20% 0.28
B2O3 42.00% 1.47
LOI 35.00%n/a
Oxide Weight 157.85
Formula Weight 242.84


See generic Ulexite for information.

This material is imported into North America from National BoraXX. It is available as a powder or in granular form (used in fertilizers).

Trace amounts of silica, alumina and a few other oxides are not shown in the chemistry here. This material contains 0.02 As.

Related Information


Materials Turkish Colemanite
A mineral with very high B2O3 and CaO content.
Materials Ulexite
A natural source of boron, it melts at a very low temperature to a clear glass.
Materials Hydroboracite 30
Typecodes Flux Source
Materials that source Na2O, K2O, Li2O, CaO, MgO and other fluxes but are not feldspars or frits. Remember that materials can be flux sources but also perform many other roles. For example, talc is a flux in high temperature glazes, but a matting agent in low temperatures ones. It can also be a flux, a filler and an expansion increaser in bodies.
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