Electron microprobe and Mossbauer spectroscopy data of clinopyroxene standards (NERC Grant NE/T011106/1)

Compositional data of clinopyroxene crystals standards analysed by electron probe microanalyses for major element oxides and by Mossbauer spectroscopy for iron valence and unknown clinopyroxene crystals from Iceland and the Azores . These data were collected in support of research described in the following preprints: https://doi.org/10.31223/X5CT03 and https://doi.org/10.31223/X5N959