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 the year prior in June of 2016. They also performed the song "Shampoo Bubble", the coupling track to their single "Beautiful Day", which had been released two weeks prior to the tour performance. The tour's set design received a positive response from fans, along with the chosen songs and overall enthusiasm of Keita, Shinya and Akira. Lead 15th Anniversary Live Box Lead 15th Anniversary Live Box: Special Box Shiyou (スペシャルBOX仕様 / "Special Box Specification") is a special live DVD collection released by the Japanese hip-hop group Lead on December 20, 2017. The live box featured two separate performances spanning across