Pyrrhotite superstructures. Part II: a TEM study of 4C and 5C structures

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2C triclinic, 4C and 5C hexagonal superstructures of pyrrhotite have been found in specimens from Nagyborzsony, Hungary. SAED (Selected Area Electron Diffraction) patterns taken from [100] and [11̄0] directions of the hexagonal NiAs-type subcell are compared with the intensity values calculated for the theoretical structures presented in Part I of this work (Posfai & Dodony, 1990). The 2C phase is found to have a 10203040 stacking sequence of iron layers whereas the 10203000 structure is confirmed for the 4C phase. Two types of basic 5C structure occur in the specimens; one with a 1020103040, the other with a 1020030400 sequence. TEM images are used to observe random stacking phenomena. -Authors

Original languageEnglish
Pages (from-to)529-535
Number of pages7
JournalEuropean Journal of Mineralogy
Issue number4
Publication statusPublished - Jan 1 1990

ASJC Scopus subject areas

  • Geochemistry and Petrology

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