Unusual types of extended defects in synthetic high pressure–high temperature diamonds. Issue 47 (16th November 2018)

• Record Type: Journal Article
• Authors: Shiryaev, Andrey A.; Zolotov, Denis A.; Suprun, Olena M.; Ivakhnenko, Sergei A.; Averin, Alexey A.; Buzmakov, Alexey V.; Lysakovskyi, Valentin V.; Dyachkova, Irina G.; Asadchikov, Victor E.
• Is Part Of: CrystEngComm. Volume 20:Issue 47(2018)
• Page Start: 7700
• Page End: 7705
• Publication Date: 2018-11-16
• Subjects: Crystals -- Periodicals; Crystal growth -- Periodicals; Crystallography -- Periodicals; Cristaux -- Périodiques; Cristaux -- Croissance -- Périodiques; Cristallographie -- Périodiques; 548
• DOI: 10.1039/c8ce01499j
• Languages: English
• ISSNs: 1466-8033

Abstract

Abstract : Side view of a HPHT diamond with unusual cone-like defects and the high magnification image of the defect. Abstract : New unusual types of extended defects resembling bunches of divergent dislocations are observed in high quality synthetic HPHT single crystal diamonds grown at the lowest possible PT-conditions. Thorough characterisation of the samples by X-ray topotomography, optical microscopy and vibrational spectroscopy allowed the conclusion that these defects are related to dislocations decorated by oxide inclusions. An unusual feature of the defects is their origin: small-angle grain boundaries formed during growth instabilities. Although similar defects were observed in some isostructural materials, their presence in diamonds was not reported earlier.