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
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