Confirmation of Siderazot, Fe3N1.33, the Only Terrestrial Nitride Mineral

Bette, Sebastian; Theye, Thomas; Bernhardt, Heinz-Jürgen; Clark, William P.; Niewa, Rainer

doi:10.3390/min11030290

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Confirmation of Siderazot, Fe₃N_1.33, the Only Terrestrial Nitride Mineral

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Clark, William P.
Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Bette, S., Theye, T., Bernhardt, H.-J., Clark, W. P., & Niewa, R. (2021). Confirmation of Siderazot, Fe₃N_1.33, the Only Terrestrial Nitride Mineral. Minerals, (11): 290, pp. 1-13. doi:10.3390/min11030290.

Cite as: https://hdl.handle.net/21.11116/0000-0008-2B3C-6

Abstract

Siderazot, the only terrestrial nitride mineral, was reported only once in 1876 to occur as coating on volcanic rocks in a fumarolic environment from Mt. Etna and, to date, has been neither confirmed nor structurally characterized. We have studied the holotype sample from the Natural History Museum, London, UK, originally collected by O. Silvestri in 1874, and present siderazot with ε-Fe3N-type crystal structure and composition of Fe3N1.33(7) according to crystal structure Rietveld refinements, in good agreement with electron microprobe analyses. Crystal structure data, chemical composition, and Raman and reflectance measurements are reported. Possible formation conditions are derived from composition and phase stability data according to synthetic samples. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.