Three atom probe tomography (APT) analysis of pyrite from Vatukoula, Fiji

Description

This dataset is linked to the manuscript Between defects and inclusions: the fate of tellurium in pyrite, submitted to Chemical Geology. The dataset aims to help decipher the exact nature of the incorporation of Te and of other trace elements into pyrite. The sample was taken from Philip shaft of the Vatukoula mine (formerly Emperor), Fiji. Three atom probe tomography (APT) analysis from one pyrite grain were run with a CAMECA LEAP 4000X HR instrument. One at the Department of Materials Science and Engineering at Erlangen, Germany and two at the Geoscience Atom Probe Facility, at the John de Laeter Centre of Curtin University, Australia. The APT analyses were conducted in laser-assisted mode using an ultraviolet laser (λ = 355 nm) and under cryogenic base temperatures (50 to 60 K). The laser pulse energy was set between 35 and 50 pJ and the laser pulse rate at 125 kHz. An automated detection rate was maintained at 0.01 ion/pulse. Atom Probe Tomography data were reconstructed in 3 dimensions using CAMECA’s APsuite 6 software. Voltage evolution mode reconstructions were performed with an atomic volume of 0.01325 nm3/atom and an empirically determined electric field of 19.1 V/nm. The APT files (.RHIT) can be opened and interrogated with the AP Suite software packages available from CAMECA.

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