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Sr 4 Fe 6 O 12 : Low‐Temperature Fe 2+ –Fe 3+ Charge Order within Pairs of Edge‐Linked Tetrahedra
Author(s) -
Lü Min Feng,
Waerenborgh João C.,
Greaves Colin
Publication year - 2013
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201209473
Subject(s) - tetrahedron , order (exchange) , crystallography , charge (physics) , enhanced data rates for gsm evolution , center (category theory) , phase (matter) , physics , chemistry , combinatorics , computer science , mathematics , particle physics , telecommunications , quantum mechanics , finance , economics
Mix and match : Topotactic hydride reduction allows the first synthesis of the fully reduced parent phase, Sr 4 Fe 6 O 12 , of the important family Sr 4 Fe 6 O 13±δ . The structure provides a rare example of pairs of edge‐linked tetrahedra, in this case containing a random arrangement of Fe II and Fe III centers at 300 K. On cooling, charge order occurs so that each pair of tetrahedra has one Fe II (white) and one Fe III (black) center.