Spectroscopic evidence of the origin of brown and pink diamonds family from Internatsionalnaya kimberlite pipe (Siberian craton)

Yuryeva, O. P.; Рахманова, М. И.; Zedgenizov, D. A.; Kalinina, V. V.

doi:10.1007/s00269-020-01088-5

Cited by 15 publications

(5 citation statements)

References 83 publications

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“…The link between DR pink to red to purple and brown diamonds was elaborated and a mechanism involving post-growth plastic deformation at different temperatures was suggested that could explain the occurrence of the different colors; in this mechanism, it is suggested that the brown color occurs when the plastic deformation occurred at a higher temperature while the pink to red to purple color occur when the plastic deformation occurred at a lower temperature. This is consistent with the conclusions drawn in earlier publications [32]. Such a mechanism would be perfectly suitable to explain the presence of both pink and brown color lamellae in one and the same diamond, by assuming that the post-growth plastic deformation process did not only occur in one single event, but in two or multiple events at significantly different temperatures.…”

Section: Discussionsupporting

confidence: 91%

A Defect Study and Classification of Brown Diamonds with Deformation-Related Color

Hainschwang

Notari²,

Pamies

2020

Minerals

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For this study, the properties of a large sample of various types of brown diamonds with a deformation-related (referred to as “DR” in this work) color were studied to properly characterize and classify such diamonds, and to compare them to pink to purple to red diamonds. The acquisition of low temperature NIR spectra for a large range of brown diamonds and photoexcitation studies combined with various treatment experiments have opened new windows into certain defect characteristics of brown diamonds, such as the amber centers and naturally occurring H1b and H1c centers. It was determined that the amber centers (referred to as “AC” in this work) exhibit rather variable behaviors to annealing and photoexcitation; the annealing temperature of these defects were determined to range from 1150 to >1850 °C and it was found that the 4063 cm−1 AC was the precursor defect of many other ACs. It is suggested that the amber centers in diamonds that contain at least some C centers are essentially identical to the ones seen in diamonds without C centers, but that they likely have a negative charge. The study of the naturally occurring H1b and H1c link them to the amber centers, specifically to the one at 4063 cm−1. Annealing experiments have shown that the H1b and H1c defects and the 4063 cm−1 AC were in line with each other. The obvious links between these defects points towards our suggestion that the H1b and H1c defects are standalone defects that consist of multiple vacancies and nitrogen and that they are—in the case of brown diamonds—a side product of the AC formation. A new classification of DR brown diamonds was elaborated that separates the diamonds in six different classes, depending on type and AC. This classification had been completed recently with the classification of brown diamonds with a non-deformation-related color (referred to as “NDR”), giving a total of 11 classes of brown diamonds.

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Section: Discussionsupporting

confidence: 91%

A Defect Study and Classification of Brown Diamonds with Deformation-Related Color

Hainschwang

Notari²,

Pamies

2020

Minerals

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“…The 613 nm center is observed in diamonds of different types and has been described in many works [6,[34][35][36]. The ZPL at 612.4 nm was accompanied by phonon replicas with phonon energies of 17, 43 (longwave acoustic modes), and 77 meV (acoustic diamond lattice vibration) [6].…”

Section: Photoluminescencementioning

confidence: 83%

“…The center correlates with the EPR signal, presumably attributed to dangling bonds in the dislocation core [27]. It is also possible that the 490.7 nm center is related to a complex involving several nitrogen atoms and vacancies [33,34].…”

Section: Photoluminescencementioning

confidence: 85%

Diamonds from the Mir Pipe (Yakutia): Spectroscopic Features and Annealing Studies

et al. 2021

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For this study, 21 samples of colorless octahedral diamonds (weighing 5.4–55.0 mg) from the Mir pipe (Yakutia) were investigated with photoluminescence (PL), infrared (IR), and electron paramagnetic resonance (EPR) spectroscopies. Based on the IR data, three groups of diamonds belonging to types IIa, IaAB, and IaB were selected and their spectroscopic features were analyzed in detail. The three categories of stones exhibited different characteristic PL systems. The type IaB diamonds demonstrated dominating nitrogen–nickel complexes S2, S3, and 523 nm, while they were less intensive or even absent in the type IaAB crystals. The type IIa diamonds showed a double peak at 417.4+418.7 nm (the 418 center in this study), which is assumed to be a nickel–boron defect. In the crystals analyzed, no matter which type, 490.7, 563.5, 613, and 676.3 nm systems of various intensity could be detected; moreover, N3, H3, and H4 centers were very common. The step-by-step annealing experiments were performed in the temperature range of 600–1700 °C. The treatment at 600 °C resulted in the 563.5 nm system’s disappearance; the interstitial carbon vacancy annihilation could be considered as a reason. The 676.5 nm and 613 nm defects annealed out at 1500 °C and 1700 °C, respectively. Furthermore, as a result of annealing at 1500 °C, the 558.5 and 576 nm centers characteristic of superdeep diamonds from São Luis (Brazil) appeared. These transformations could be explained by nitrogen diffusion or interaction with the dislocations and/or vacancies produced.

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“…The vibrational sidebands are formed by interactions with 38 and 78 meV phonons close to a quasi-local vibration of a vacancy. A peak at 612 nm has been observed in untreated plastically deformed brown and pink diamonds (Hainschwang et al 2006;Titkov et al 2008;Tretiakova 2009;Gaillou et al 2010;Yuryeva et al 2020). The 613-nm centre has also been observed in the grains of polycrystalline samples, from colourless to those dyed various shades of grey and yellow (Yang et al 2012).…”

Section: Nm Excited Plmentioning

confidence: 85%

Specific spectroscopic features of yellow cuboid diamonds from placers in the north-eastern Siberian Platform

Mashkovtsev¹,

Рахманова²,

Zedgenizov³

2021

J. Geosci.

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A series of yellow cuboid diamonds from alluvial placers in the north-eastern Siberian platform have been examined with Fourier-transform infrared (FTIR) absorption spectroscopy, photoluminescence (PL) and electron paramagnetic resonance (EPR). All crystals having characteristic FTIR spectra with predominantly C and A centres belong to mixed type IaA/Ib with small total nitrogen content (up to 330 ppm). PL is characterized by many bands with two bands related to the NV 0 and NVcentres common to all the samples. The FTIR spectra are also characterized by deformation-induced 'amber' centers. Some of the yellow diamonds studied show new bands at 4272, 4548, and 5960 cm -1 instead of the bands at 4060 and 4170 cm -1 common for 'amber' centres. An EPR study has revealed the presence of OK1 centres associated with titanium impurity. The plastic deformation of the studied diamonds is expressed as a 'tatami' strain pattern in the features of their internal structure.

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Spectroscopic evidence of the origin of brown and pink diamonds family from Internatsionalnaya kimberlite pipe (Siberian craton)

Cited by 15 publications

References 83 publications

A Defect Study and Classification of Brown Diamonds with Deformation-Related Color

A Defect Study and Classification of Brown Diamonds with Deformation-Related Color

Diamonds from the Mir Pipe (Yakutia): Spectroscopic Features and Annealing Studies

Specific spectroscopic features of yellow cuboid diamonds from placers in the north-eastern Siberian Platform

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