Bone Ash
A standard material in Glazecalc's library: its oxide analysis, unity contribution and hazards.
What it is
- Kind
- Fluxes
- Formula
- Ca₃(PO₄)₂
- Source
- Theoretical formula
Tricalcium phosphate. Real bone ash may contain a little CaCO₃ and so a small LOI.
Oxide analysis and unity formula
Glazecalc has the analysis of Bone Ash as moles of each fired oxide per formula. The unity contribution is the moles of each oxide in the amount of Bone Ash that holds 1.0 mole of flux, which is how Glazecalc adds it into a recipe's unity formula.
| Oxide | Moles | Unity contribution |
|---|---|---|
| CaO | 3 | 1.000 |
| P₂O₅ | 1 | 0.333 |
- Equivalent weight
- 103.39
- Fired weight
- 103.39
- Loss on ignition
- 0%
The equivalent weight is the grams of Bone Ash that hold 1.0 mole of flux. The fired weight is what is left of that after firing.
Hazards and safety
Hazards: Warning (Potterycrafts SDS): H302 harmful if swallowed; H315 causes skin irritation; H319 causes serious eye irritation; H335 dry dust may cause respiratory irritation.
Use it in a recipe
Add Bone Ash to a recipe in the Glazecalc calculator to see what it does to a glaze's unity formula.