Imaging the atomic structure and local chemistry of platelets in natural type Ia diamond.

Nature Materials
E J OlivierAngus I Kirkland

Abstract

In the past decades, many efforts have been devoted to characterizing {001} platelet defects in type Ia diamond. It is known that N is concentrated at the defect core. However, an accurate description of the atomic structure of the defect and the role that N plays in it is still unknown. Here, by using aberration-corrected transmission electron microscopy and electron energy-loss spectroscopy we have determined the atomic arrangement within platelet defects in a natural type Ia diamond and matched it to a prevalent theoretical model. The platelet has an anisotropic atomic structure with a zigzag ordering of defect pairs along the defect line. The electron energy-loss near-edge fine structure of both carbon K- and nitrogen K-edges obtained from the platelet core is consistent with a trigonal bonding arrangement at interstitial sites. The experimental observations support an interstitial aggregate mode of formation for platelet defects in natural diamond.

References

Feb 9, 2005·Physical Review Letters·C R MirandaR W Nunes
Sep 16, 2010·Acta Crystallographica. Section B, Structural Science·Alexei BosakLeonid Dubrovinsky
Sep 9, 2009·Journal of Physics. Condensed Matter : an Institute of Physics Journal·S FeltonJ M Baker
Nov 8, 2016·Science Advances·Siddharth DhomkarCarlos A Meriles

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Citations

Dec 5, 2019·Nature Communications·Anmin NieWei Yang
Feb 23, 2018·Nature Materials·Jannik Meyer

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Methods Mentioned

BETA
X-ray
transmission electron microscopy

Software Mentioned

Digital Micrograph
DigitalMicrograph
DigitalMicrograph ( Gatan Microscopy Suite )
hyperspy
JEMS

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