The luminescent nature of orange coloration in natural diamonds: optical and EPR study

Titkov, S. V.; Mineeva, R. M.; Zudina, N. N.; Сергеев, А. М.; Ryabchikov, I. D.; Shiryaev, A. A.; Speransky, A. V.; Zhikhareva, V. P.

doi:10.1007/s00269-014-0705-x

Cited by 16 publications

(10 citation statements)

References 27 publications

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“…A number of works on diamond crystals of cubic habit with various colors (from brown to red–brown), containing paramagnetic OK1 and N3 centers, notes a shift of 1130 cm −1 band up to 1145 cm −1 in the IR spectra . This effect is speculated to be caused by the defects which are formed from A centers by plastic deformation .…”

Section: Discussionmentioning

confidence: 99%

The influence of HTHP treatment on the OK1 and N3 centers in natural diamond crystals

Nadolinny

Palyanov

Yuryeva

et al. 2015

Physica Status Solidi (a)

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The structures of nitrogen-containing paramagnetic centers OK1 and N3 have not been unambiguously determined yet. In this paper, we will present data on the influence of high temperature annealing on the paramagnetic centers OK1 and N3 in diamond. A series of natural colored diamond crystals of cubic habit containing paramagnetic centers OK1 and N3 was studied by electron paramagnetic resonance (EPR), luminescence, and IR spectroscopies. It was found that annealing at temperatures above 2470 K led to the transformation of N3 paramagnetic centers into OK1 paramagnetic centers. Previous work has showed that a temperature in excess of 2400 K are often associated with a local environment change of tetrahedral to octahedral for impurities with large atomic radii. We report a correlation with the intensity of the optical 635.7 nm system and the concentration of the N3 EPR center. However, on stepped annealing 635.7 nm was removed before the N3 EPR center. From the analysis presented, we propose that the N3 EPR center and the 635.7 nm optical system are the manifestation of various defects formed by one impurity atom. 1 Introduction Although the nitrogen-containing paramagnetic centers OK1 and N3 [1, 2] were first detected more than 30 years ago, the identity of these centers was not been unambiguously determined [2][3][4][5]. Regarding the nature of defects in diamond, more than 500 have been characterized with only a handful identified. Of those positively identified, EPR was often a key tool used in unlocking their structure and identity. This includes nitrogen centers P1 [6], P2 [7,8], W7 formed by the interaction of Acenters with the dislocation [9,10], and N 2 V which is the result of the interaction of A-centers with vacancies [10]. In addition, the structures of nickel-nitrogen centers NE1-NE9 [11][12][13][14], boron-nickel centers [15], nitrogen-cobalt centers [16,17], nitrogen-phosphorus centers NP1-NP7 [18][19][20], oxygen-containing [21], and hydrogen-containing centers [22,23] were determined. OK1 and N3 EPR centers remain unidentified but are often observed together, as shown by recent studies [23]. They are a characteristic

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Section: Discussionmentioning

confidence: 99%

The influence of HTHP treatment on the OK1 and N3 centers in natural diamond crystals

Nadolinny

Palyanov

Yuryeva

et al. 2015

Physica Status Solidi (a)

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“…More notably, the 480 nm absorption extends only to ~550 nm in nearly all of these stones, even in the orange fancy-color diamonds. Absorption color calculations indicate that the resulting color should be mostly yellow in all cases, strongly suggesting that the luminescence discussed in the next section accounts for part of the color in the orange stones (Titkov et al, 2015).…”

Section: Ultraviolet-visible/near-infrared Absorption (Uv-vis-nir)mentioning

confidence: 95%

“…As discussed in the UV-Vis-NIR section earlier, 480 nm band absorption alone produces only yellow color. However, the combination of that absorption and this red luminescence is likely the cause of orange color in the majority of the world's most beautiful orange diamonds (Titkov et al, 2015).…”

Section: Photoluminescence (Pl)mentioning

confidence: 99%

Naturally Colored Yellow and Orange Gem Diamonds: The Nitrogen Factor

Breeding¹,

Eaton-Magaña²,

Shigley³

2020

G&G

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A mong fancy-color diamonds, those with saturated blue, green, and red colors are the rarest and generally the most highly valued. Over the last decade, however, diamonds with pure hues in these colors have made up less than one-tenth of one percent of all diamonds examined at GIA, making them virtually unattainable in the marketplace. In recent issues of Gems & Gemology, we have documented the gemological and spectroscopic properties of the rarest of fancy-color diamonds ranging from pink-to-red, blue, and green to the more unusual white and black. This article will address the most common colored diamonds, those with yellow hues, while also examining their much rarer orange cousins (figure 1). This is the last of the fancy color groups in this series, and a brief summary of all the colored diamond groups is provided at the end of the article. Yellow and orange diamonds owe their color primarily to nitrogen impurities that are incorporated in the diamond lattice during growth deep in the earth. Nitrogen is the most common impurity in natural diamond due to the very similar atomic radii of nitrogen and carbon atoms (155 and 170 picometer Van der Waals radii, respectively) as well as the relative abundance of nitrogen in the growth environment. If nitrogen is present when diamond grows, it will inevitably be incorporated. Nitrogen is the sixth most abundant element in the universe and accounts for more than 75% of the earth's atmosphere (Bebout

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“…Редкие дефекты (X, 1240 см -1 , линии в интервале 1350-1380 см -1 , янтарные дефекты), выявленные в изученных россыпных алмазах, детально исследовались ранее в образцах неизвестного происхождения [Collins, Mohammed, 1982;Woods, Collins, 1983;Clark, Davey, 1984;Lawson et al, 1998;Massi, 2006;Hainschwang et al, 2012Hainschwang et al, , 2013. Однако общее сопоставление результатов изучения россыпных кристаллов (эта статья) с имеющимися данными по кубам II разновидности из кимберлитов Сибирской платформы [Бескрованов, 2000;Titkov et al, 2014] указывает на их близкое сходство, что, в свою очередь, свидетельствует в пользу глубинного генезиса алмазов II разновидности из россыпей северо-востока Сибирской платформы. Подтверждением глубинного генезиса изученных алмазов является развитие в них пластических деформаций.…”

Section: рис 8 представительные спектры разных зон оранжевого алмазunclassified

Defects in Cubic Diamonds From the Placers in the Northeastern Siberian Platform: Results of Ir Microspectrometry

2015

GiG

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The luminescent nature of orange coloration in natural diamonds: optical and EPR study

Cited by 16 publications

References 27 publications

The influence of HTHP treatment on the OK1 and N3 centers in natural diamond crystals

The influence of HTHP treatment on the OK1 and N3 centers in natural diamond crystals

Naturally Colored Yellow and Orange Gem Diamonds: The Nitrogen Factor

Defects in Cubic Diamonds From the Placers in the Northeastern Siberian Platform: Results of Ir Microspectrometry

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