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Apatite

Calcium Phosphate

Formula: Ca5(PO₄)3(OH, F, Cl)

Richard Willis

Popular bone-ash substitute. Melts only superficially, with core hard and granular, so fuses with a difference, with very strong opacifying attributes. An interesting calcium phosphate to use where either calciums or phosphates are called for in glaze formulas, such as those calling for bone ash — owing to the molecular similarity — re- Ca₃(PO₄)₂ in contrast to Ca₅[(F, OH)(PO
₄)₃]. At temperatures below 1200ºC, apatite is a good substitute for bone ash, as, owing to its contribution of fluorine, it is a stronger flux.

Out Bound Links

• (Typecodes - Unspecified) 1: GNM - Generic Material
• (URLs) Apatite at Wikipedia
  http://en.wikipedia.org/wiki/Apatite

In Bound Links

• (Oxides - Material source) P2O5 - Phosphorus Pentoxide

XML for Import into INSIGHT

<?xml version="1.0" encoding="UTF-8"?>
<material name="Apatite" descrip="Calcium Phosphate" searchkey="" loi="0.00" casnumber="7757-93-9">
<oxides>
<oxide symbol="CaO" name="Calcium Oxide, Calcia" status="" percent="55.600" tolerance=""/>
<oxide symbol="P2O5" name="Phosphorus Pentoxide" status="" percent="42.200" tolerance=""/>
</oxides>
<volatiles>
<volatile symbol="LOI" name="Loss on Ignition" percent="2.200" tolerance=""/>
</volatiles>
</material>

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