Building upon these investigations, we have now isolated an alternative phase by using specific quantities of formic acid as modulator. We have shown by 3D electron diffraction that this phase comprises a two-dimensional material with hxl topologyan unusual example of a two-dimensional MOF containing linear dicarboxylate ligands and Zr6 clusters -that we have named GUF-14. Herein we describe the isolation and characterisation of GUF-14, its exfoliation into metal-organic nanosheets, and their catalytic activity.