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Middlebackite is an organic mineral with the formula Cu₂C₂O₄(OH)₂. It was first discovered within a boulder from the Iron Monarch quarry in South Australia in June 1990. Peter Elliott from the University of Adelaide, Australia, identified the structure of the mineral 25 years later. He determined its crystal structure through single-crystal X-ray diffraction using synchrotron radiation. Elliot named the mineral for the Middleback Range where it originated. In 2018 middlebackite was found in Val di Fiemme, Italy, during researches that brought to the discovery of a new mineral named fiemmeite.

Localities

• Australia: Iron Monarch open cut, Iron Knob, Middleback Range, Eyre Peninsula, South Australia
• Italy: Passo di san Lugano, near Carano

References

1. Warr, L.N. (2021). "IMA–CNMNC approved mineral symbols". Mineralogical Magazine. 85 (3): 291–320. Bibcode:2021MinM...85..291W. doi:10.1180/mgm.2021.43. S2CID 235729616.
2. "Middlebackite: Middlebackite mineral information and data". www.mindat.org. Retrieved 2017-09-01.
3. "Carbon Mineral Challenge Update Spring 2016: Four New Minerals Found". Carbon Mineral Challenge. Retrieved 2017-09-01.
4. Demartin, Francesco; Campostrini, Italo; Ferretti, Paolo; Rocchetti, Ivano (2018). "Fiemmeite Cu2(C2O4)(OH)2∙2H2O, a New Mineral from Val di Fiemme, Trentino, Italy". Minerals. 8 (6): 248. doi:10.3390/min8060248. hdl:2434/583094.

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