**Appendix A**


**Table A1.** Spectrometer setup for the EPMA high-resolution mappings.

**Table A2.** Setup for EPMA measurements with focused electron beam on Zr-Silicates and pyrochlore. Sorted according to spectrometer optimization.



**Table A3.** Setup for EPMA measurements on REE-carbonate minerals with a beam diameter of 10 μm.
