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
A Boyar Wedding Feast the collection. Notes Citations Bibliography A Boyar Wedding Feast Konstantin Makovsky was a Russian realist painter who opposed academic restrictions. His paintings venerate Russia's old world customs. "A Boyar Wedding Feast" is painted as a scene from the seventeenth-century – depicting the old way of Russian life, bringing back memories of the cherished past. "A Boyar Wedding Feast" is an oil on canvas painting measuring , set in either the 16th or 17th century, in which a room of guests are depicted toasting a newlywed couple. A traditionally offered boyar wedding toast is meant to encourage the first kiss to