Mössbauer Study of β‐ and δ‐FeOOH and their Disintegration Products | Zendy

Dézsi I. | Zendy; Keszthelyi L. | Zendy; Kulgawczuk D. | Zendy; McInár B. | Zendy; Eissa N. A. | Zendy

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Mössbauer Study of β‐ and δ‐FeOOH and their Disintegration Products

Author(s) -

Dézsi I.,

Keszthelyi L.,

Kulgawczuk D.,

McInár B.,

Eissa N. A.

Publication year - 1967

Publication title -

physica status solidi (b)

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.51

H-Index - 109

eISSN - 1521-3951

pISSN - 0370-1972

DOI - 10.1002/pssb.19670220234

Subject(s) - octahedron , mössbauer spectroscopy , paramagnetism , curie temperature , quadrupole splitting , ion , chemistry , crystallography , quadrupole , tetrahedron , mössbauer effect , analytical chemistry (journal) , inorganic chemistry , ferromagnetism , condensed matter physics , crystal structure , physics , atomic physics , organic chemistry , chromatography

β‐FeOOH and δ‐FeOOH are studied by Mössbauer effect measurements. The Néel point of β‐FeOOH is T N = (295 ± 4) °K. Above this temperature the material is paramagnetic with quadrupole splitting and it decomposes to α‐Fe 2 O 3 at 670 °K. The transition at this temperature takes 12 hours. The two internal magnetic fields observed in δ‐FeOOH are found to correspond to Fe 3+ ions in octahedral and tetrahedral positions. δ‐FeOOH decomposes to intermediate products at 370 °K below its Curie Temperature and it disintegrates to α‐Fe 2 O 3 at approximately 510 °K.

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