Norman, MarcMcCulloch, MalcolmO'Neill, HughYaxley, Gregory2015-12-070267-9477http://hdl.handle.net/1885/19402Magnesium isotopic compositions of olivine were measured by laser-ablation multi-collector ICP-MS using an ArF 193 nm excimer laser. Analytical precision based on replicate analyses of mantle olivine is ∼0.2 permil (2SD). This is about an order of magniKeywords: Composition; Excimer lasers; Fractionation; Ionization; Isotopes; Laser ablation; Magnesium printing plates; Mass spectrometry; Composition-dependent matrix effects; Matrix effects; Repetition rates; Solution aspiration multi-collector ICP-MS; Olivine200610.1039/b510719a2015-12-07