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
My Gift Is You says: "Don't need no money. Don't need a thing / I don't even need a wedding ring / All I need is love and the truth / And I got it, my gift is you". In these lyrics, Stefani "disregards material possessions [in favor of] Christmas" and "flaunts her newfound love with [Shelton]". "My Gift Is You" was selected as a standout track by several music critics. Sal Cinquemani from "Slant Magazine" singled out the track as a highlight on "You Make It Feel Like Christmas", describing it as "Stefani's obligatory entry in the canon of contemporary holiday songs in