Talk:Boron arsenide

Color(less)?

BAs should be balck or grey, but 3.47 eV (B₁₂As₂)? So wide band gap should mean that it is even colorless, transparent compound in pure form, like SiC. This compound contains only atoms of metalloids but is colorless?

95.49.61.108 (talk) 18:26, 22 November 2013 (UTC)

Wide bandgap materials are, as you point out, transparent (or white) in their defect-free state, since they don't absorb visible light. If they are not colorless, this indicates some kind of light-absorbing defect, creating a color center; often due to impurities (for example, iron impurities in silica glass give obsidian its characteristic black color.)

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