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Materials hosting kagome lattices have drawn interest for the diverse magnetic and electronic states generated by geometric frustration. In the compounds (, Rb, Cs), stacked vanadium kagome layers give rise to unusual charge density waves (CDW) and superconductivity. Here we report single-crystal growth and characterization of , a hexagonal -type compound that shares this structural motif. We identify a first-order phase transition at 92 K. Single crystal x-ray and neutron diffraction reveal a charge density wave modulation of the atomic lattice below this temperature. This is a distinctly different structural mode than that observed in the compounds, but both modes have been anticipated in kagome metals. The diverse family offers more opportunities to tune and explore density wave order in kagome lattice materials.