Hey there, did it indicate the presence of any titanium ? I've got a rock that analyzes 3% Ir too, but it is also 15% Titanium and about 66% Fe and a little silica, mg. Its either a stony iron meteorite (sm. amt. of olivine crystals present), or a relic from the Sudbury structure event. I found it amongst a field of glacial till in northern Ohio. A good book for Ir chem. is Refining and Recovery of PM's by Ammen. Ya need to pulverize that thing and give it the usual treatment. A good test is to precipitate out , I think it was a complex anion of Ir having a plurality of nitrous groups as ligands.My iridium source averages 3 to 8% iridium in the ore I'm mining. 90% of the ores iron, the rest is gold silver and copper all below 1%. My question is this, is there anyone out there mining iridium coming up with similar percentages? And is 3 to 8% a sensible percentage to try to process and refine?
There was a nobel prize winning professor out at UC, who came up with a theory about the dispersion of Ir. We normally don't find it concentrated much above 0.5% or so, typically, .... IF I recall correctly