Automated FTIR mapping of boron distribution in diamond

D. Howell, A. T. Collins, L. C. Loudin, P. L. Diggle, U. F.S. D'Haenens-Johansson, K. V. Smit, A. N. Katrusha, J. E. Butler, F. Nestola

Research output: Contribution to JournalArticleAcademicpeer-review

Abstract

Type IIb diamonds are those that contain more boron than nitrogen. The presence of this uncompensated boron gives rise to absorption in the infrared part of the electromagnetic spectrum, extending into the visible region and often resulting in blue colouration. Here we report on the expansion of the DiaMap freeware (for the automated spectral deconvolution of Type I [nitrogen containing] diamonds) to work on Type IIb diamonds, returning concentrations from three boron-related absorption bands, and determining which band provides the most reliable value. The program uses the calibration coefficients of Collins (2010), which show good relative agreement between the three bands, but might require some further study to confirm their absolute accuracy to the uncompensated boron concentration. The methodology of DiaMap_IIb is applicable to all Type IIb diamonds, both natural and synthetic. Analysis of high-resolution Fourier-transform infrared (FTIR) maps of two high-pressure high-temperature (HPHT) synthetic diamonds using DiaMap_IIb, confirm the growth sector dependence of the boron incorporation. Partitioning of boron strongly favours the octahedral {111} sectors.

Original languageEnglish
Pages (from-to)207-215
Number of pages9
JournalDiamond and Related Materials
Volume96
Early online date22 May 2019
DOIs
Publication statusPublished - Jun 2019

Fingerprint

Diamond
Boron
Diamonds
Fourier transforms
boron
diamonds
Infrared radiation
Nitrogen
sectors
Synthetic diamonds
nitrogen
electromagnetic spectra
Deconvolution
Absorption spectra
Calibration
methodology
absorption spectra
color
expansion
high resolution

Keywords

  • Boron defects
  • DiaMap
  • Impurities
  • Sector partitioning
  • Type IIb diamonds

Cite this

Howell, D., Collins, A. T., Loudin, L. C., Diggle, P. L., D'Haenens-Johansson, U. F. S., Smit, K. V., ... Nestola, F. (2019). Automated FTIR mapping of boron distribution in diamond. Diamond and Related Materials, 96, 207-215. https://doi.org/10.1016/j.diamond.2019.02.029
Howell, D. ; Collins, A. T. ; Loudin, L. C. ; Diggle, P. L. ; D'Haenens-Johansson, U. F.S. ; Smit, K. V. ; Katrusha, A. N. ; Butler, J. E. ; Nestola, F. / Automated FTIR mapping of boron distribution in diamond. In: Diamond and Related Materials. 2019 ; Vol. 96. pp. 207-215.
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Howell, D, Collins, AT, Loudin, LC, Diggle, PL, D'Haenens-Johansson, UFS, Smit, KV, Katrusha, AN, Butler, JE & Nestola, F 2019, 'Automated FTIR mapping of boron distribution in diamond' Diamond and Related Materials, vol. 96, pp. 207-215. https://doi.org/10.1016/j.diamond.2019.02.029

Automated FTIR mapping of boron distribution in diamond. / Howell, D.; Collins, A. T.; Loudin, L. C.; Diggle, P. L.; D'Haenens-Johansson, U. F.S.; Smit, K. V.; Katrusha, A. N.; Butler, J. E.; Nestola, F.

In: Diamond and Related Materials, Vol. 96, 06.2019, p. 207-215.

Research output: Contribution to JournalArticleAcademicpeer-review

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AU - Howell, D.

AU - Collins, A. T.

AU - Loudin, L. C.

AU - Diggle, P. L.

AU - D'Haenens-Johansson, U. F.S.

AU - Smit, K. V.

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AU - Nestola, F.

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AB - Type IIb diamonds are those that contain more boron than nitrogen. The presence of this uncompensated boron gives rise to absorption in the infrared part of the electromagnetic spectrum, extending into the visible region and often resulting in blue colouration. Here we report on the expansion of the DiaMap freeware (for the automated spectral deconvolution of Type I [nitrogen containing] diamonds) to work on Type IIb diamonds, returning concentrations from three boron-related absorption bands, and determining which band provides the most reliable value. The program uses the calibration coefficients of Collins (2010), which show good relative agreement between the three bands, but might require some further study to confirm their absolute accuracy to the uncompensated boron concentration. The methodology of DiaMap_IIb is applicable to all Type IIb diamonds, both natural and synthetic. Analysis of high-resolution Fourier-transform infrared (FTIR) maps of two high-pressure high-temperature (HPHT) synthetic diamonds using DiaMap_IIb, confirm the growth sector dependence of the boron incorporation. Partitioning of boron strongly favours the octahedral {111} sectors.

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Howell D, Collins AT, Loudin LC, Diggle PL, D'Haenens-Johansson UFS, Smit KV et al. Automated FTIR mapping of boron distribution in diamond. Diamond and Related Materials. 2019 Jun;96:207-215. https://doi.org/10.1016/j.diamond.2019.02.029