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Issue 4, 2018
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Preparation of “natural” diamonds by HPHT annealing of synthetic diamonds

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Abstract

In this paper, IIa, Ib, N-doped and N–H co-doped diamonds were studied, and the interaction mechanisms between hydrogen and nitrogen in the diamonds were investigated in detail. The results show that the degree of nitrogen aggregation in the {111} face is higher than that in the {100} face. The N-doped and N–H co-doped crystals exhibit an obvious color difference between the {100} and {111} faces within the same crystal after annealing. The existence of hydrogen is favorable for the aggregation of nitrogen atoms from C-centers to A-centers and B-centers in diamonds. By annealing N–H co-doped diamonds, hydrogen-doped IaA+B type synthetic “natural” diamonds were obtained.

Graphical abstract: Preparation of “natural” diamonds by HPHT annealing of synthetic diamonds

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Publication details

The article was received on 21 Nov 2017, accepted on 20 Dec 2017 and first published on 20 Dec 2017


Article type: Paper
DOI: 10.1039/C7CE02013A
Citation: CrystEngComm, 2018,20, 505-511
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    Preparation of “natural” diamonds by HPHT annealing of synthetic diamonds

    C. Fang, Y. Zhang, Z. Zhang, C. Shan, W. Shen and X. Jia, CrystEngComm, 2018, 20, 505
    DOI: 10.1039/C7CE02013A

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