Astromat

Atom probe tomography reconstructed data from APT specimen OREX-803470-109, analysed in laser-assisted mode. All valid APT data is included, using an extended (Epos) data format that allows generation of alternative spatial reconstructions if required. This data set contains a moderate amount of 69Ga contamination near the specimen surface due to ion implantation during specimen preparation with a monoisotopic 69Ga+ focussed ion beam. The data indicates an initial pentlandite mineral phase followed by a transition into pyrrhotite containing several fluid inclusions. Because the specimen voltage varied significantly through the transition, the reconstruction was performed using the geometric constraint of a 5 degree shank angle, rather than using the voltage to model the specimen radius. A mass range definition file is included with all identified mass peaks.