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Calcium Phosphate

Formula: Ca5(PO4)3(OH, F, Cl)

Oxide Weight75.90
Formula Weight77.61
If this formula is not unified correctly please contact us.
DENS - Density (Specific Gravity) 2.9-3.2
HMOH - Hardness (Moh) 5.0
GSPT - Frit Softening Point 1300C D

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.

Calcite W Apatite

Apatite Crystals

Apatite In Calcite

Fluorite Apatite

Fluorapatite On Apatite

Out Bound Links

In Bound Links

By Tony Hansen

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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