Fig. 3: 57Fe Mössbauer spectra of Ca4FeN4. | Nature Communications

Fig. 3: 57Fe Mössbauer spectra of Ca4FeN4.

From: Preparation of iron(IV) nitridoferrate Ca4FeN4 through azide-mediated oxidation under high-pressure conditions

Fig. 3

Data (blue circles) were collected at 297, 50 and 10 K, orange curve belongs to FeIV of Ca4FeN4, green curve belongs to an unidentified byproduct, grey dashed line is the sum of the individual curves. Green byproduct doublet appears at isomer shifts δ297K = 0.22, δ50K = 0.08, δ10K = −0.6 mm/s (intensity ratio Fe4+/Feimpurity = 85.8/14.2 was fixed in the low temperature fits using the 297 K value).

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