Tin pest related problems such as tin whiskers. At 13.2 °C (about 56 °F) and below, pure tin transforms from the silvery, ductile metallic allotrope of β-form "white tin" to the brittle, nonmetallic, α-form "grey tin" with a diamond cubic structure. The transformation is slow to initiate due to a high activation energy but the presence of germanium (or crystal structures of similar form and size) or very low temperatures of roughly −30 °C aids the initiation. There is also a large volume increase of about 27% associated with the phase change to the nonmetallic low temperature allotrope. This frequently makes tin
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