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
Puyo Puyo! 15th Anniversary with your friends using the Friend Code system or against random opponents. When playing random games, three-player mode and the original Puyo Puyo rules are not available, and you can earn (or lose!) points if playing a two-player game. Puyo Puyo! 15th Anniversary for the DS had several issues. In the original release of Puyo Puyo! 15th Anniversary, a bug existed where data would could not be saved more than 255 times. A new version, nicknamed 1.1, was released to solve the problem on January 20, 2007. Information on how to find out the game version and instructions on how