Powder Neutron Diffraction Study of Pyrolusite, β-MnO2

1993/06/01 by AA Bolzan, Celesta Fong, C Fong +3
Materials Science · Physics and Astronomy · #Nuclear Physics and Applications #Thermal and Kinetic Analysis #X-ray Diffraction in Crystallography

paper · doi:10.1071/ch9930939

openalex publication_date 1993/06/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/30

Abstract

The powder neutron diffraction pattern of pyrolusite, ß-MnO2 [P42/mnm, No. 136, a = 4.4041(1), c = 2.8765(1)?], has been refined by the Rietveld method to give values for both the oxygen position parameter u=0.3046(1) and the anisotropic thermal parameters. The data confirm the MnO6 octahedra to be elongated with two long [1.894(1)?] and four short [1.882(2)?] Mn-O bond distances. The effect of the stereochemistry on the thermal vibrations is discussed.

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