Hydroboracite 30

Alternate Names: Argentinian Hydroborocite

Oxide	Analysis	Formula
CaO	14.50%	0.66
MgO	5.40%	0.34
B2O3	30.00%	1.10
SiO2	12.00%	0.51
Fe2O3	0.55%	0.01
SO4	2.50%	n/a
LOI	20.00%	n/a
Oxide Weight		159.12
Formula Weight		205.32

Notes

Also CaMgB6O8(OH)6:3(H₂O)
This is mined in North Argentina, in the Andes Mountains, at about 4500 meters altitude. Material is normally sold in bulk bag but the company has facilities to pack in 25 and 50 kg bags also.

As2O₃: 300-600 ppm

Size Granulated or Crushed to 20 mesh

Related Information

Links

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.
Minerals	Hydroboracite A minor borate ore.
Materials	Chilean Ulexite
Materials	Turkish Ulexite 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.

By Tony Hansen
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