The C center isolated nitrogen-related infrared absorption at 2688 cm(-1): perfect harmony in diamond

Research areas:

• Surfaces planétaires (2011 - 2016)

Year:

2012

Authors:

• T. Hainschwang
• E. Fritsch
• L. Massi
• Benjamin Rondeau
• F. Notari

Journal:

JOURNAL OF APPLIED SPECTROSCOPY

Volume:

79

Number:

5

Pages:

737-743

Month:

November

ISSN:

0021-9037

BibTex:

@article{WOS:000311782700009, author = "T. Hainschwang and E. Fritsch and L. Massi and Benjamin Rondeau and F. Notari", abstract = "Seventy-six diamonds with detectable C centers were selected based on the presence of a 1344 and/or 2688 cm(-1) absorption in their infrared (IR) spectra. Such diamonds are always distinctly colored, often in yellow to orange with various modifications of colours such as brown and green. Fifty-seven of them had an IR spectrum exhibiting the well-known C center-related 1344.4 cm(-1) (hereinafter 1344 cm(-1)) IR absorption peak with an absorption coefficient of more than 0.1. The IR spectra of 15 diamonds had a 1344 cm(-1) peak with an absorption coefficient below 0.1 cm(-1). Finally, in the spectra of 4 samples the 1344 cm(-1) peak was undetectable because of strong aggregated nitrogen absorption but the 2688 cm(-1) line was present. When the 1344 cm(-1) absorption is superior to 0.1 cm(-1), this fairly sharp line (FWHM = 3.3-4.2 cm(-1)) at 2688 cm(-1) is detected, which correlates in intensity with the 1344 cm(-1) feature.", doi = "10.1007/s10812-012-9664-5", extra = "PICL", issn = "0021-9037", journal = "JOURNAL OF APPLIED SPECTROSCOPY", month = "NOV", number = "5", pages = "737-743", title = "{T}he {C} center isolated nitrogen-related infrared absorption at 2688 cm(-1): perfect harmony in diamond", volume = "79", year = "2012", }

Abstract:

Seventy-six diamonds with detectable C centers were selected based on the presence of a 1344 and/or 2688 cm(-1) absorption in their infrared (IR) spectra. Such diamonds are always distinctly colored, often in yellow to orange with various modifications of colours such as brown and green. Fifty-seven of them had an IR spectrum exhibiting the well-known C center-related 1344.4 cm(-1) (hereinafter 1344 cm(-1)) IR absorption peak with an absorption coefficient of more than 0.1. The IR spectra of 15 diamonds had a 1344 cm(-1) peak with an absorption coefficient below 0.1 cm(-1). Finally, in the spectra of 4 samples the 1344 cm(-1) peak was undetectable because of strong aggregated nitrogen absorption but the 2688 cm(-1) line was present. When the 1344 cm(-1) absorption is superior to 0.1 cm(-1), this fairly sharp line (FWHM = 3.3-4.2 cm(-1)) at 2688 cm(-1) is detected, which correlates in intensity with the 1344 cm(-1) feature.