 The abstract ionic liquid, IL, solid interface is a complex structure with multiple layers and components. Previous studies have focused on one or two aspects of the interface, but this research combines several techniques to provide a comprehensive view of the interface. It was found that the EAN-MICA interface is more complex than previously thought, with surface adsorbed, near-surface, surface normal, and lateral heterogeneities that extend beyond the immediate vicinity of the solid substrate. This work significantly advances our understanding of the IL solid interface. This article was authored by Aaron Ellborn, Madeline Dupont, Rashad Kariuki, and others.