Wollastonite (NYAD 400)
A standard material in Glazecalc's library: its oxide analysis, unity contribution and hazards.
What it is
- Kind
- Fluxes
- Formula
- CaO•SiO₂ (ideal CaSiO₃: CaO 48.28, SiO₂ 51.72)
- Also called
- NYAD 400, NYAD, Wollastonite NYAD, NYAD-G, NYAD 325, NYAD M200
- Made by
- NYCO Minerals, Willsboro, New York (now part of Imerys)
- Sold in
- US
- Source
- NYCO data sheet 'Wollastonite NYAD 400' (document IN-071-05-2, undated) (2012-07)
High-purity New York wollastonite with low LOI. Imerys markets NYAD M200, M325 and M400 grades for ceramic bodies and glazes; Sheffield Pottery sells NYAD-G.
Oxide analysis and unity formula
Glazecalc has the analysis of Wollastonite (NYAD 400) as weight percent of the raw material. The unity contribution is the moles of each oxide in the amount of Wollastonite (NYAD 400) that holds 1.0 mole of flux, which is how Glazecalc adds it into a recipe's unity formula.
| Oxide | Weight % | Unity contribution |
|---|---|---|
| CaO | 46.36 | 0.993 |
| SiO₂ | 51.6 | 1.031 |
| Fe₂O₃ | 0.77 | 0.006 |
| Al₂O₃ | 0.4 | 0.005 |
| MnO | 0.15 | 0.003 |
| MgO | 0.15 | 0.004 |
| TiO₂ | 0.05 | 0.001 |
| K₂O | 0.02 | 0.000 |
- Equivalent weight
- 120.08
- Fired weight
- 119.48
- Loss on ignition
- 0.5%
The equivalent weight is the grams of Wollastonite (NYAD 400) that hold 1.0 mole of flux. The fired weight is what is left of that after firing.
Hazards and safety
Hazards: Needle-shaped (acicular) mineral dust; avoid breathing it.
Use it in a recipe
Add Wollastonite (NYAD 400) to a recipe in the Glazecalc calculator to see what it does to a glaze's unity formula.