other adsorbents like clays ( kaolin , bentonite , montmorillonite ) , different silicates ( florisil , magnesium trisilicate , calcium silicate , talc ) , hydroxyapatite , barium sulfate , calcium carbonate , calcium fluoride and titanoxide have been examined as model systems for the separation of nucleotides , nucleosides and amino acids on mineral surfaces .
C0006675
calcium
C0006681
calcium