Muffin-tin approximation Muffin-tin approximation The muffin-tin approximation is a shape approximation of the potential well in an crystal lattice. It is most commonly employed in quantum mechanical simulations of the electronic band structure in solids. The approximation was proposed by John C. Slater. Augmented plane wave method (APW) is a method which uses muffin-tin approximation. It is a method to approximate the energy states of an electron in a crystal lattice. The basic approximation lies in the potential in which the potential is assumed to be spherically symmetric in the muffin-tin region and constant in the interstitial region. Wave functions (the augmented
A Boyar Wedding Feast 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 make the wine sweeter. The