Title
Ionothermal Synthesis, Crystal Structure, and Magnetic Study of Co2PO4OH Isostructural with Caminite
Document Type
Article
Publication Version
Published Version
Publication Date
2014
Journal or Book Title
Inorganic Chemistry
Volume
53
Issue
6
First Page
3072
Last Page
3077
DOI
10.1021/ic4029904
Abstract
A new framework cobalt(II) hydroxyl phosphate, Co2PO4OH, was prepared by ionothermal synthesis using 1-butyl-4-methyl-pyridinium hexafluorophosphate as the ionic liquid. As the formation of Co2PO4F competes in the synthesis, the synthesis conditions have to be judiciously chosen to obtain well-crystallized, single phase Co2PO4OH. Single-crystal X-ray diffraction analyses reveal Co2PO4OH crystallizes with space group I41/amd (a = b = 5.2713(7) Å, c = 12.907(3) Å, V = 358.63(10) Å3, and Z = 4). Astonishingly, it does not crystallize isotypically with Co2PO4F but rather isotypically with the hydroxyl minerals caminite Mg1.33[SO4(OH)0.66(H2O)0.33] and lipscombite Fe2–yPO4(OH) (0 ≤ y ≤ 2/3). Phosphate tetrahedra groups interconnect four rod-packed face-sharing ∞1{CoO6/2} octahedra chains to form a three-dimensional framework structure. The compound Co2PO4OH was further characterized by powder X-ray diffraction, Fourier transform–infrared, and ultraviolet–visible spectroscopy, confirming the discussed structure. The magnetic measurement reveals that Co2PO4OH undergoes a magnetic transition and presents at low temperatures a canted antiferromagnetic spin order in the ground state.
Copyright Owner
American Chemical Society
Copyright Date
2014
Language
en
File Format
application/pdf
Recommended Citation
Wang, Guangmei; Valldor, Martin; Spielberg, Eike T.; and Mudring, Anja V., "Ionothermal Synthesis, Crystal Structure, and Magnetic Study of Co2PO4OH Isostructural with Caminite" (2014). Materials Science and Engineering Publications. 203.
https://lib.dr.iastate.edu/mse_pubs/203
Included in
Ceramic Materials Commons, Complex Fluids Commons, Other Chemical Engineering Commons, Other Materials Science and Engineering Commons
Comments
Reprinted with permission from Inorg. Chem., 2014, 53 (6), pp 3072–3077. Copyright 2014 American Chemical Society.