Distinct domains in "guarinite" from monte somma, Italy: Microstructural hrtem evidence

Alessandro Genovese*, Marcello Mellini, Stefano Merlino

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    Abstract

    Guarinite" crystals, of composition Na 1.56Ca 11.13Zr 2.33Nb 0.07Mn 0.51Fe 0.40(Si 2O 7) 4(O 3.31F 4.69), show extensive defective microstructural arrangements, deriving from the presence of domains with different unit-cells. The structural complexity of "guarinite" results from the variable arrangements of simple structural building units (i.e., Si 2O 7 groups), possibly shifted by c/2 within the framework of octahedra. Actually, [100] and [010] images acquired with a transmission electron microscope reveal ubiquitous lamellar microstructures. Interlocked irregular domains characterize the [001] projection.

    Original languageEnglish (US)
    Pages (from-to)549-557
    Number of pages9
    JournalCanadian Mineralogist
    Volume50
    Issue number2
    DOIs
    StatePublished - Apr 1 2012

    Keywords

    • Guarinite
    • High-resolution transmission electron microscopy
    • Microstructure
    • Modulation
    • Twinning

    ASJC Scopus subject areas

    • Geochemistry and Petrology

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