Layered materials are of significant interest in materials science, as they provide the foundation of many applications, including most battery electrode materials. Among the 43 materials that A-lab synthesized, there is one layered compound, KMn 3 O 6 . This compound was predicted by Materials Project (mp-1016190) to crystallize in space group C2/c. The structure can be viewed as related to α-NaFeO 2 , which consists of layers of edge-sharing FeO 6 octahedra with Na cations between the layers and crystallized in space group R 3m.