May PDF Entry

Barium Iron Oxide: PDF Entry 00-039-1433

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Ring patterns provides a two-dimensional (2D) simulation of the diffraction pattern for a given phase as it would appear on a flat 2D detector such as photographic film, phosphor image plates, or solid state arrays. The simulation assumes uniaxial positioning of the detector (transmission geometry with incident beam centered) and an infinite number of randomly oriented crystallites.

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EBSD patterns are electron diffraction simulations based on algorithms originally developed by R.P. Goehner and J.R. Michael. These patterns are useful in confirming phase identity, crystallite orientation, and crystalline symmetry. The Kikuchi line positions are determined kinematically using unit cell parameters and space group extinction conditions associated with the PDF entry.

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