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
Spiritual gift Helps: This gift has to do with service to the sick and the poor. Possessor of this gift has a "spiritual burden and a God-given love for the needy and afflicted". Administration: Also called the gift of governing, the Greek word translated "governments" is "kubernesis", the verb form of which means "to steer" or "to be a helmsman". This gift then refers to the God-given capacity to lead or guide the Church through storms and difficult seas. While not specifically defined as spiritual gifts in the Bible, other abilities and capacities have been considered as spiritual gifts by some Christians.