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Article

Heavily Boron Doped Diamond Powder: Synthesis and Rietveld Refinement

Institute for High Pressure Physics RAS, Kaluzhskoe highway, Str. 14, Troitsk, Moscow 108840, Russia
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Crystals 2018, 8(7), 297; https://doi.org/10.3390/cryst8070297
Received: 9 June 2018 / Revised: 16 July 2018 / Accepted: 17 July 2018 / Published: 19 July 2018
(This article belongs to the Special Issue Rietveld Refinement in the Characterization of Crystalline Materials)
Boron-doped diamonds were synthesized by the reaction of an amorphous globular carbon powder (80%) with a powder of 1,7-di (oxymethyl)-M-carborane (20%) in a ‘toroid’-type high-pressure chamber at a pressure of 8.0 GPa and temperature of 1700 °C. The structure was refined by the Rietveld method according to the X-ray powder diffraction data. It was shown that the unit cell parameters of these diamonds have two discrete quantities: around 3.570 Å for small concentrations of B (~1–1.5%) and around 3.578 Å for large concentrations of B (~2–3%). The concentration of the vacancies in the diamonds exceeds the concentration of boron atoms by 2–3 fold. This fact can play an important role in the formation of the structure and in determining the physical properties of diamonds. View Full-Text
Keywords: diamond; synthesis; high pressure; high temperature; X-ray powder diffraction; Rietveld refinement diamond; synthesis; high pressure; high temperature; X-ray powder diffraction; Rietveld refinement
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MDPI and ACS Style

Zibrov, I.P.; Filonenko, V.P. Heavily Boron Doped Diamond Powder: Synthesis and Rietveld Refinement. Crystals 2018, 8, 297. https://doi.org/10.3390/cryst8070297

AMA Style

Zibrov IP, Filonenko VP. Heavily Boron Doped Diamond Powder: Synthesis and Rietveld Refinement. Crystals. 2018; 8(7):297. https://doi.org/10.3390/cryst8070297

Chicago/Turabian Style

Zibrov, Igor P., and Vladimir P. Filonenko 2018. "Heavily Boron Doped Diamond Powder: Synthesis and Rietveld Refinement" Crystals 8, no. 7: 297. https://doi.org/10.3390/cryst8070297

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