Figure 2From: Abiotic ammonium formation in the presence of Ni-Fe metals and alloys and its implications for the Hadean nitrogen cycleXRD patterns of metals/alloys used in this study. Note the similarity in patterns of Ni, Ni50Fe50 and Ni81Fe19 stemming from the same space group (Fm-3m). Fe0 possesses Im-3m space group.Back to article page