Magnetic properties and cation ordering in two synthetic bornite samples, Cu5(Fe, Mn)S4

Miria Borgheresi, Francesco Di Benedetto, Andrea Caneschi, Maurizio Romanelli, David J. Vaughan

    Research output: Contribution to journalArticlepeer-review


    The magnetic properties of a synthetic bornite, Cu5FeS 4, and of a Mn-bearing synthetic bornite were investigated using Superconducting Quantum Interference Device (SQUID) magnetometry and room temperature X-band Electron Paramagnetic Resonance (EPR) spectroscopy. Samples were synthesised from the elements using conventional dry methods. Chemical and phase compositions of the samples were confirmed by means of Electron Probe Micro-Analysis (EPMA) and by powder X-Ray Diffraction (XRD). Experimental results, interpreted using spectral simulations, highlight the superexchange nature of ionic interactions between paramagnetic centres and the role played by partial intervalence charge transfer between the Fe(III) and Cu(I) species in natural and synthetic bornite. The cation distribution in synthetic samples was shown to be different from the natural sample, in spite of the close similarity in chemical composition and structure.
    Original languageEnglish
    Pages (from-to)113-121
    Number of pages8
    JournalPeriodico di Mineralogia
    Issue number1
    Publication statusPublished - Apr 2011


    • Bornite
    • EPMA
    • EPR spectroscopy
    • Intervalence charge transfer
    • Mn(II)
    • SQUID magnetometry


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