Tin bent, a crackling sound known as the "tin cry" can be heard from the twinning of the crystals. Tin melts at low temperatures of about , the lowest in group 14. The melting point is further lowered to for 11 nm particles. β-tin (the metallic form, or white tin, BCT structure), which is stable at and above room temperature, is malleable. In contrast, α-tin (nonmetallic form, or gray tin), which is stable below , is brittle. α-tin has a diamond cubic crystal structure, similar to diamond, silicon or germanium. α-tin has no metallic properties at all because its atoms form
Lead 15th Anniversary Live Box DVD held their fifteenth live tour "Lead Upturn 2017 ～This is Our Day～". The live box charted at #59 on the Oricon DVD charts and #61 on the Blu-ray charts, remaining on the charts for one week. "Lead 15th Anniversary Live Box" is a DVD/Blu-ray two disc collection released by the Japanese hip-hop group Lead on December 20, 2017. It charted #59 on the Oricon DVD charts and #61 on the Oricon Blu-ray charts, where it remained on both for one week. The live box featured two separate performances spanning across two DVD/Blu-rays to celebrate the group's fifteenth anniversary in