Tuning of a Kagome Magnet: Insulating Ground State in Ga‐Substituted Cu₄(OH)₆Cl₂

Here, a successful synthesis method of the series Ga x Cu 4– x (OD) 6 Cl 2 with substitutions up to x = 0.8 is presented. The compound remains a frustrated kagome system with an insulating ground state similar to herbertsmithite for these substitutions, as the additional charge of Ga 3+ is most likely bound to additional OH − and Cl − . Besides infrared measurements, we present magnetic and specific‐heat data down to 2 K for selected samples...