This project contains the data associated with the manuscript entitled "Electron-nuclear decoupling at a spin clock transition". The manuscript is currently under review, and a pre-print (earlier version) can be found at: https://arxiv.org/abs/2106.05185. Separate Excel and Origin files are stored here for each of the figures in the manuscript. The spectroscopic and theoretical work reported in this paper was supported by the Center for Molecular Magnetic Quantum Materials (M$^2$QM), an Energy Frontier Research Center funded by the US Department of Energy, Office of Science, Basic Energy Sciences under Award DE-SC0019330. Experimental work performed at the National High Magnetic Field Laboratory is supported in part by the National Science Foundation (under DMR-1644779 and DMR-2128556) and the State of Florida. Synthesis of the HoW$_{10}$ sample was supported by: the EU (ERC-2018-AdG-788222 MOL-2D, the QUANTERA project SUMO, and FET-OPEN grant 862893 FATMOLS); the Spanish MCIU (grant CTQ2017-89993 and PGC2018-099568-B-I00 co-financed by FEDER, grant MAT2017-89528; the Unit of excellence ‘Maríade Maeztu’ CEX2019-000919-M); and the Generalitat Valenciana (Prometeo Program of Excellence).