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On the composition of delafossite

Published online by Cambridge University Press:  14 March 2018

H. Wiedersich ,
J. W. Savage ,
A. H. Muir Jr.  and
D. G. Swarthout
H. Wiedersich
Affiliation:
North American Aviation Science Center Thousand Oaks, California 91360, U.S.A.
J. W. Savage
Affiliation:
North American Aviation Science Center Thousand Oaks, California 91360, U.S.A.
A. H. Muir Jr.
Affiliation:
North American Aviation Science Center Thousand Oaks, California 91360, U.S.A.
D. G. Swarthout
Affiliation:
North American Aviation Science Center Thousand Oaks, California 91360, U.S.A.
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Summary

Oxides of the Cu-Fe-O system prepared by solid-state reaction methods have been investigated by X-ray, Mössbauer effect, and analytical chemical techniques. In agreement with most previous investigations of this system, it is found that CuFeO2 exists as a stable compound, and that the mineral delafossite has essentially this composition. These results are in disagreement with those of Buist, Gadalla, and White who propose that delafossite has an approximate composition Cu6Fe3O7 instead of CuFeO2. In fact, a compound of composition Cu6F3O7 could not be prepared. The Mössbauer isomer shift provides confirmation that the iron in CuFeO2 is trivalent.

Type
Research Article
Information
Mineralogical magazine and journal of the Mineralogical Society , Volume 36 , Issue 281 , March 1968 , pp. 643 - 650
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1968

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