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 Gift of Magic of someone with immense talent who just doesn’t care about it, and several strong family moments". A Gift of Magic A Gift of Magic is a 1971 novel by Lois Duncan about a grandmother who gives her grandchildren distinct gifts. Brendon is given the gift of music, Kirby is given the gift of dance, and Nancy is given the gift of magic. "A Gift of Magic" was originally published in 1971 by Little, Brown and Company in hardcover. In 2012, the novel was reissued with changes to modernize the content, and changes to the name and ages of some of