Nepheline Syenite
A standard material in Glazecalc's library: its oxide analysis, unity contribution and hazards.
What it is
- Kind
- Feldspars and stones
- Formula
- K₂O: 0.25; Na₂O: 0.75; Al₂O₃: 1.11; SiO₂: 4.65
- Similar materials
- Nepheline Syenite A270
- Source
- Glazecalc’s original data (2017), from a ceramics reference book
Typical formula. Higher ratio of fluxes makes this material melt at lower temps than most feldspars.
Oxide analysis and unity formula
Glazecalc has the analysis of Nepheline Syenite as moles of each fired oxide per formula. The unity contribution is the moles of each oxide in the amount of Nepheline Syenite that holds 1.0 mole of flux, which is how Glazecalc adds it into a recipe's unity formula.
| Oxide | Moles | Unity contribution |
|---|---|---|
| K₂O | 0.25 | 0.250 |
| Na₂O | 0.75 | 0.750 |
| Al₂O₃ | 1.11 | 1.110 |
| SiO₂ | 4.65 | 4.650 |
- Equivalent weight
- 462.6
- Fired weight
- 462.6
- Loss on ignition
- 0%
The equivalent weight is the grams of Nepheline Syenite that hold 1.0 mole of flux. The fired weight is what is left of that after firing.
Hazards and safety
Hazards: Not classified (Sibelco SDS, GB/IE); avoid breathing the dust.
Use it in a recipe
Add Nepheline Syenite to a recipe in the Glazecalc calculator to see what it does to a glaze's unity formula.