Related by context. Frequent words. (Click for all words.) 61 osmium 58 terbium 56 Germanium 56 europium 55 carbonaceous 55 Barium 55 Zirconium 55 rubidium 54 chemically inert 54 cerium 54 dysprosium 54 titanium oxide 54 SiO2 54 iridium 54 olivine 54 MgO 54 silicate 54 yttrium 54 monazite 54 gallium 53 oxides 53 bismuth 53 copper oxide 52 Yttrium 52 cuprates 52 adsorbed 52 ruthenium 52 hydroxide 52 tellurium 52 silicates 52 siliceous 52 radioactive decay 52 SiO 2 51 nickel alloy 51 Sulfate 51 dioxide 51 Nanotube 51 nacre 51 dispersive 51 graphitic 51 Neodymium 51 indium 51 zircons 51 oxidized 51 graphite 50 zirconium 50 colloid 50 copper Cu 50 nonreactive 50 Bismuth 50 anions 50 zeolites 50 dopant 50 hydride 50 niobium 50 oxide 50 chalcocite 50 PZT 49 apatite 49 hafnium 49 nanocrystalline 49 mica 49 pyroxenite 49 HREO 49 iron oxides 49 Chromite 49 krypton 49 molybdenite 49 iron oxide 49 americium 49 QDs 49 germanium 49 atomic nuclei 49 absorbance 49 isotopic composition 49 crystalline structure 49 SWNTs 49 Niobium 49 Fluorine 48 spodumene 48 calcite 48 photonic crystal 48 Oxidation 48 cobalt 48 biotite 48 nanometer sized 48 malachite 48 REEs 48 nuclei 48 muon 48 TiO 2 48 dopants 48 nanoscopic 48 AlN 48 rhenium 48 lanthanum 48 Rare earth 48 isomers 48 basalts 48 hydroxyapatite 47 deuterium