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<i>POWD</i>, an interactive program for powder diffraction data interpretation and indexing
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1989
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X-ray CrystallographyCrystal StructureEngineeringElectron DiffractionPowder CompactionCeramic PowdersStructure DeterminationChemical ImagingMaterials SciencePhysicsCrystalline DefectsLimited Impurity LinesDiffractionMicroanalysisCrystallographySystematic Absence TestMicrostructureInteractive ProgramNatural SciencesSpectroscopyMaterials CharacterizationApplied PhysicsX-ray Diffraction
POWD is an interactive Fortran77 program for powder diffraction data interpretation and indexing. It incorporates least‑squares refinement, systematic‑absence testing, and a modified de Wolff figure of merit to speed execution and assess indexing reliability. Testing on multiple powder data sets shows very high indexing success rates and robustness to limited impurity lines. Published in J.
An interactive program, POWD, written in Fortran77, for powder diffraction data interpretation and indexing is described. Various functions such as the least-squares refinement and the systematic absence test are also included in this versatile program. The modified de Wolff figure of merit [Wu (1988). J. Appl. Cryst. 21, 530–535] is introduced in the program to decrease the execution time and estimate the reliability of the indexing. Very high success rates for indexing and tolerance of the presence of limited impurity lines are demonstrated by testing the program on several groups of powder data.