usedHONDA said "Apatite Ca5(PO4)3(OH,F,Cl)"
You should have decided between Ca5(PO4)3(OH), Ca5(PO4)3F and Ca5(PO4)3Cl. You can't say three things at once by using a general formula.
Maybe it woulb be good to add a link to wikipedia or something if you use such uncommon things.
I still have no idea in which way Apatite could "beat" hydrochloric acid.
But, anyway, hot Apatite Ca5(PO4)3(OH) > Apatite
because then it becomes phosphorescating.