Crystal structure "white tin" respectively. Two more allotropes, γ and σ, exist at temperatures above 161 °C and pressures above several GPa. White tin is metallic, and is the stable crystalline form at or above room temperature. Below 13.2 °C, tin exists in the gray form, which has a diamond cubic crystal structure, similar to diamond, silicon or germanium. Gray tin has no metallic properties at all, is a dull gray powdery material, and has few uses, other than a few specialized semiconductor applications. Although the α–β transformation temperature of tin is nominally 13.2 °C, impurities (e.g. Al, Zn, etc.) lower the
Baltimore, or, The Steadfast Tin Soldier and the Vampire tend their wounds and drink. Baltimore explains bitterly that his fight is not over, that it will never be over, and that he understands what he has been made into. Then Baltimore reaches into his chest and pulls out his heart, which has become a lump of tin with his wife's wedding ring set in its side. Mike Mignola came up with the concept for "Baltimore, or, The Steadfast Tin Soldier and the Vampire" and conceived much of the plot, though Christopher Golden penned the novel based on their joint efforts. In 2010 Dark Horse Comics began a comic book