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Crystals 2015, 5(4), 534-550; doi:10.3390/cryst5040534

Physiochemical Characterization of Iodine (V) Oxide Part II: Morphology and Crystal Structure of Particulate Films

1
University of Dayton Research Institute, U.S. Air Force Research Laboratory, Eglin AFB, FL 32542, USA
2
Naval Surface Warfare Center Indian Head Explosive Ordinance Technology Division, Indian Head, MD 20640, USA
3
Air Force Research Laboratory, Energetic Materials Branch, Eglin AFB, FL 32542, USA
*
Author to whom correspondence should be addressed.
Academic Editor: Thomas M. Klapötke
Received: 16 September 2015 / Revised: 23 October 2015 / Accepted: 26 October 2015 / Published: 2 November 2015
(This article belongs to the Special Issue Energetic Materials)
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Abstract

In this study, the production of particulate films of iodine (V) oxides is investigated. The influence that sonication and solvation of suspended particles in various alcohol/ketone/ester solvents have on the physical structure of spin or drop cast films is examined in detail with electron microscopy, powder x-ray diffraction, and UV-visible absorption spectroscopy. Results indicate that sonicating iodine oxides in alcohol mixtures containing trace amounts of water decreases deposited particle sizes and produces a more uniform film morphology. UV-visible spectra of the pre-cast suspensions reveal that for some solvents, the iodine oxide oxidizes the solvent, producing I2 and lowering the pH of the suspension. Characterizing the crystals within the cast films reveal their composition to be primarily HI3O8, their orientations to exhibit a preferential orientation, and their growth to be primarily along the ac-plane of the crystal, enhanced at higher spin rates. Spin-coating at lower spin rates produces laminate-like particulate films versus higher density, one-piece films of stacked particles produced by drop casting. The particle morphology in these films consists of a combination of rods, plates, cubes, and rhombohedra structure. View Full-Text
Keywords: iodine (V) oxide; iodine pentoxide; I2O5; hydrogen iodate; triperiodic acid; HI3O8; HIO3-I2O5; iodic acid; HIO3; spin coating; drop casting; film iodine (V) oxide; iodine pentoxide; I2O5; hydrogen iodate; triperiodic acid; HI3O8; HIO3-I2O5; iodic acid; HIO3; spin coating; drop casting; film
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Little, B.K.; Emery, S.B.; Lindsay, C.M. Physiochemical Characterization of Iodine (V) Oxide Part II: Morphology and Crystal Structure of Particulate Films. Crystals 2015, 5, 534-550.

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