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Figure 1
(a) DSC curves of Fe2P2O7 in the range −160 to 140°C showing the reversible phase transitions α1 ⇌ α2 (left) and α2 ⇌ α3 (right). (b) DSC curves of Fe2P2O7 (heating red, cooling blue with curves of the first derivative in orange and lilac, respectively) in the range 30 to 220°C showing the reversible phase transitions α2 ⇌ α3 (left) and α3 ⇌ β (right).

IUCrJ
Volume 12| Part 6| November 2025| Pages 670-682
ISSN: 2052-2525
https://doi.org/10.1107/S2052252525007547