Cadycal

Alternate Names: Cadycal Jan/00

Description: Precipitated Calcium Borate

Oxide	Analysis	Formula
CaO	26.00%	0.98
MgO	0.24%	0.01
B2O3	47.50%	1.45
Fe2O3	0.05%	-
Na2O	0.10%	-
SiO2	0.50%	0.02
Al2O3	0.10%	-
SrO	0.03%	-
K2O	0.01%	-
LOI	25.00%	n/a
SO3	0.50%	n/a
H2O	1.00%	n/a
Cl	0.07%	n/a
Oxide Weight		158.10
Formula Weight		215.30

Notes

Cadycal was a calcium borate mineral produced by Fort Cady Minerals Corp of Newberry Springs, CA (http://www.cadycal.com). Their plant was in the same area as US Borax and other boron producers. The ore body from which Cadycal was made is 1400 feet below the surface. The mining was done by drilling wells into the ore body and pumping down a solution of diluted sulfuric acid. The resulting boric acid was pumped to the surface and reacted with lime to produce a pure calcium borate that was dried and packaged. Like Gerstley Borate, Cadycal did have some particulate lime material (depending on the quality of the lime used in the process).

Cadycal contained much more boron than Gerstley Borate and had a different mix of auxiliary oxides so it was not a chemical equivalent. It was not plastic and did not impart any creamy consistency, dry hardness, or suspension properties to glaze slurries. It was a great candidate to make up part of the recipe for a substitution for GB because its chemistry was so similar to Colemanite, a mineral portion of GB. Cadycal was an exceptionally good melter at low temperatures, it was already very fluid by cone 06. Amazingly, although Cadycal had a higher boron content than Ulexite, the latter melted one or two cones earlier.

During the development of Boraq we actually flew to California to visit this facility south of Barstow.

The analysis shown here was provided by Fort Cady in May 2003.

Related Information

Links

Materials	Colemanite A natural source of boron that melts at a very low temperature.
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.
URLs	https://gerstleyborate.com GerstleyBorate.com - The best place for info on Gerstley Borate This page is the gateway to the most comprehensive source of information about the material and what it actually is. It will get you on track to removing this troublesome material from your recipes and using frits instead.

Data

Bulk Density lbs/cu. ft. (Packed)	47
Sieve Analysis Dry	+60 mesh: ~0.3% +200: ~15% +325: ~35%

By Tony Hansen
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