Synthesis of a Ferrolite: A Zeolitic All‐Iron Framework. Issue 42 (6th October 2016)

• Record Type: Journal Article
• Authors: Latshaw, Allison M.; Chance, W. Michael; Morrison, Gregory; zur Loye, Karl D.; Wilkins, Branford O.; Smith, Mark D.; Whitfield, Pamela S.; Kirkham, Melanie J.; Stoian, Sebastian A.; zur Loye, Hans‐Conrad
• Is Part Of: Angewandte Chemie international edition. Volume 55:Issue 42(2016)
• Page Start: 13195
• Page End: 13199
• Publication Date: 2016-10-06
• Subjects: crystal growth -- Mössbauer spectroscopy -- neutron diffraction -- sodalite structure -- zeolites; Chemistry -- Periodicals; 540
• DOI: 10.1002/anie.201607800
• Languages: English
• ISSNs: 1433-7851

Abstract

Abstract: Crystals of the first sodalite‐type zeolite containing an all‐iron framework, a ferrolite, Ba8 (Fe12 O24 )Nay (OH)6 ⋅ x H2 O, were synthesized using the hydroflux method in nearly quantitative yield. Ba8 (Fe12 O24 )Nay (OH)6 ⋅ x H2 O crystallizes in the cubic space group P m 3 ‾ m with a= 10.0476(1) Å. Slightly distorted FeO4 tetrahedra are linked to form Fe4 O4 and Fe6 O6 rings, which in turn yield channels and internal cavities that are characteristic of the sodalite structure. Barium, sodium, and hydroxide ions and water molecules are found in the channels and provide charge balance. Magnetic measurements indicate that the ferrolite exhibits magnetic order up to at least 700 K, with the field‐cooled and zero‐field‐cooled curves diverging. Analysis of the 57 Fe Mössbauer spectra revealed two spectral components that have equal spectral areas, indicating the presence of two subsets of iron centers in the structure. Dehydrated versions of the ferrolite were also prepared by heating the sample. Abstract : The ferrolite Ba8 (Fe12 O24 )Na y (OH)6 ⋅ x H2 O, a sodalite‐type zeolite with an all‐iron framework, was grown using the hydroflux method. Historically, zeotype research has occurred in steps fueled by an initial discovery of a new class of zeotypes or a new growth method. The discovery of the first ferrolite is therefore an exciting breakthrough that might open a whole new field of zeotype materials.