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Magnesium Zirconium Silicate

Description: Low density zirconium opacifier

Oxide Analysis Formula
MgO 18.02% 1.00
ZrO2 55.10% 1.00
SiO2 26.88% 1.00
Oxide Weight 223.64
Formula Weight 223.64


A zircon opacifier which produces high opacity, strong color, softness of texture and excellent matte finishes. Introduces MgO without serious devitrification. It is much less dense than zirconium silicate.

Originally made by TAM in the 1970s and then sold to Ferro. Their data sheet showed 53% ZrO2 (the analysis shown here is theoretical).

Related Information


Materials Zircopax
Materials Zircopax Plus
Materials Zircon
Hazards Zirconium Compounds Toxicity
Typecodes Generic Material
Generic materials are those with no brand name. Normally they are theoretical, the chemistry portrays what a specimen would be if it had no contamination. Generic materials are helpful in educational situations where students need to study material theory (later they graduate to dealing with real world materials). They are also helpful where the chemistry of an actual material is not known. Often the accuracy of calculations is sufficient using generic materials.
Typecodes Opacifier
Opacifiers are powders that turn transparent glazes opaque by various chemical and physical mechanisms (and combinations of mechanisms).


Frit Softening Point 1700C
Density (Specific Gravity) 1.28 g/cc


Glaze OpacifierProduces opacity and a soft matte texture without the need for magnesia compounds which might devitrify.
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