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 music industry, having debuted on July 31, 2002 with the song "Manatsu no Magic". The first DVD/Blu-ray featured the live performed to celebrate their anniversary, "Lead 15th Anniversary Live ～Kan Ima Shirube-sai～" (感今導祭 / "Guiding Emotions"), which the group held on July 29th and July 30th at the Maihama Amphitheater. The second disc held their fifteenth live tour "Lead Upturn 2017 ～This is Our Day～" - the performance which was performed at Cosmos Theater (Kaizuka City Civic Cultural Hall) in Kaizuka, Osaka on September 10th. Bonuses on both discs featured behind-the-scenes footage of both concerts and the collection of