What is it about?
Vibrations in solids are heat-activated, and they are also altered when a solid has a disordered crystal structure. We used infrared spectroscopy to investigate heat-induced changes in the characteristic vibrations of carbonate-containing solids with different atomic arrangements. Our results suggest that knowing the packing arrangements of atoms within a solid could provide a generalizable approach to identify the most diagnostic vibration signatures for tracking either temperature-dependent or disorder-related effects in solids.
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Why is it important?
Disorder in solids can have a strong influence on their physical properties, but it is often difficult to differentiate and quantify the different kinds of disorder that can occur in a solid. Our work offers one way to help broach this problem, by providing a way to use the most heat-dependent vibrational signatures in a solid as an indicator for tracking structural disorder.
Perspectives
The work that led to this article was challenging, but very rewarding. Thanks to the crew at the Canadian Light Source Mid-IR beamline for helping to make this high-temperature spectroscopy study possible.
Professor Kristin M Poduska
Memorial University of Newfoundland
Read the Original
This page is a summary of: Linking crystal structure with temperature-sensitive vibrational modes in calcium carbonate minerals, Physical Chemistry Chemical Physics, January 2014, Royal Society of Chemistry,
DOI: 10.1039/c4cp01772b.
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