Near-Zero Thermal Expansion and High Ultraviolet Transparency in a Borate Crystal of Zn<sub>4</sub> B<sub>6</sub> O<sub>13</sub>.
basic_science · Level V
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- Record sourced from PubMed, PMID 27376511.
- Also identified by DOI 10.1002/adma.201601816.
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Abstract
Intrinsic isotropic near-zero thermal expansion is discovered in borate crystal Zn<sub>4</sub> B<sub>6</sub> O<sub>13</sub> with high transparency in the ultraviolet region. First-principles calculations demonstrate that the very low thermal expansion originates mainly from the invariability of the solid [B<sub>24</sub> O<sub>48</sub> ] truncated octahedra that are fixed by the [Zn<sub>4</sub> O<sub>13</sub> ] clusters in the ZBO structure.