A B C G H I L M N S T V Y Z A B C G H I L M N S T V Y Z A B C G H I L M N S T V Y Z Hydroxy Apatite 96% – 20nm PDF Hydroxy Apatite 96% – 40nm PDF Hydroxy Apatite 96% – 60nm PDF Halloysite Nanoclay – 30-70nm PDF