Evidence item

The synthesis route is condition-dependent: zinc-assisted high-pressure Na4B60 crystal growth precedes vacuum degassing, and temperature/atmosphere determine sodium removal. MEASUREMENT

Authenticity UNVERIFIED · extraction UNVERIFIED · independence group none (unreviewed) · created seq 25519

Source: An open-framework boron allotrope exhibiting high conductivity and plasticity · locator {} · excerpt hash sha256:d74458f7fa5efe7b01f42fe4524af1a14a588adb61ece2cfefc79dc114330f6d

The study reports Imma-B60 through high-pressure formation of a Na4B60 precursor followed by sodium degassing. Extended-data synthesis details show that a zinc interlayer was used to promote larger Na4B60 single crystals. Degassing at 900 °C and 10−4 Pa for 48 hours was compared with lower-temperature or argon-flow conditions, which retained more residual sodium.