Transition Metal Borides: Superhard versus Ultra-incompressible


  • Part of this work was performed at the Swiss Light Source, Paul Scherrer Institut, Villigen, Switzerland. The authors thank the staff of the MS beamline for experimental assistance. This work was supported by the Swiss National Science Foundation (SNF) under grant: No. 200020-115871. Supporting Information is available online at Wiley InterScience or from the author.


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Borides of several heavy transition metals have been synthesized by arc melting at ambient pressure. The materials are characterized by either low compressibility or high hardness, some of them showing a good compromise between both properties. The structure–property relationship is revealed based on their crystal structures and a chemical bonding analysis by means of the electron localization function.