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
498A: The Wedding Gift 498A: The Wedding Gift 498A: The Wedding Gift is a 2013 drama film set in New Delhi, India. It is written and directed by Suhaib Ilyasi The story of "498A: The Wedding Gift'is a fiction and love story. The film was released in 2012. Producers of "498A: The Wedding Gift" maintain that the story of the film is not based on a real incident. However, the motion picture is said to be inspired by the death of Syed Makhdoom, a Canadian national and a computer engineer by profession, who ended his life on 5 April 2009 in Bangalore, leaving four