Crystal structure "white tin" respectively. Two more allotropes, γ and σ, exist at temperatures above 161 °C and pressures above several GPa. White tin is metallic, and is the stable crystalline form at or above room temperature. Below 13.2 °C, tin exists in the gray form, which has a diamond cubic crystal structure, similar to diamond, silicon or germanium. Gray tin has no metallic properties at all, is a dull gray powdery material, and has few uses, other than a few specialized semiconductor applications. Although the α–β transformation temperature of tin is nominally 13.2 °C, impurities (e.g. Al, Zn, etc.) lower the
15th Anniversary Best Live History DVD Book 15th Anniversary Best Live History DVD Book 15th Anniversary Best Live History DVD Book (stylized as "15th Anniversary BEST LIVE HISTORY DVD BOOK") is the first compilation DVD book released by Japanese R&B-turned-pop singer Koda Kumi. The DVD book ranked #1 on the Rakuten Books Weekly Ranking in the pop/rock division. The DVD book was available nationwide in bookstores and convenience stores. "15th Anniversary Best Live History DVD Book" is the first compilation DVD book released by Japanese singer-songwriter Koda Kumi on March 26, 2015 and published by Takarajimasha. Due to the compilation being advertised as a DVD book and