Boron Nitride (BN) exhibits multiple polymorphic forms, with hexagonal boron nitride (h-BN) and cubic boron nitride (c-BN) being the most significant. h-BN is known for its graphite-like layered ...
We've known about two substances harder than a diamond since 2009: wurtzite boron nitride and lonsdaleite, according to Scientific American. The first resists indentation with 18% more fortitude ...
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