Unique diamond from the Nyurbinskaya pipe (Nakyn kimberlite field, West Yakutia, Russia)
https://doi.org/10.31242/2618-9712-2020-25-2-3
Abstract
For the first time in the world, a unique diamond has been discovered, with a smaller diamond freely moving in its cavity. The crystals were studied in detail by X-ray microtomography, which allowed us to build three-dimensional models of them, to establish in detail the morphological features of both the host and the prisoner minerals, and to determine the weight of each of them. On diametrically opposite surfaces of the host diamond, there are two through channels that lead to the cavity in which the internal diamondprisoner is located. The channels contain barite, and one of the channels is hermetically sealed with this mineral. At the entrance to the cavity, both channels are narrow and have a diameter of about 0.1 mm. The morphology of the internal walls of the cavity approximates the morphology of the surface of the internal diamond. According to the results of infrared spectroscopy, the diamond has a high content of structural nitrogen impurity 1,250 at. ppm. Integral volume mapping was performed using Raman confocal spectroscopy, which resulted in a layer-by-layer reconstruction of the internal structure of the diamond. Luminescence studies using a laser with a long excitation wave of 337 nm revealed a uniform pink-lilac glow in both diamonds.
About the Authors
D. V. Konogorova
NIGP PJSC «ALROSA»;
Lomonosov Moscow State University
Russian Federation
Russian Federation
KONOGOROVA Diana Viktorovna, senior researcher, Geo-Scientific Research Enterprise
16 Chernyshevskoe shosse, Mirny, 678170, Republic of Sakha (Yakutia)
O. E. Kovalchuk
NIGP PJSC «ALROSA»
Russian Federation
Russian Federation
KOVALCHUK Oleg Evgenievich, deputy director, Geo-Scientific Research Enterprise
16 Chernyshevskoe shosse, Mirny, 678170, Republic of Sakha (Yakutia)
L. D. Bardukhinov
NIGP PJSC «ALROSA»
Russian Federation
Russian Federation
BARDUKHINOV Leonid Daniilovich, head of the laboratory, Geo-Scientific Research Enterprise
16 Chernyshevskoe shosse, Mirny, 678170, Republic of Sakha (Yakutia)
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Review
For citations:
Konogorova D.V., Kovalchuk O.E., Bardukhinov L.D. Unique diamond from the Nyurbinskaya pipe (Nakyn kimberlite field, West Yakutia, Russia). Arctic and Subarctic Natural Resources. 2020;25(2):47-57. (In Russ.) https://doi.org/10.31242/2618-9712-2020-25-2-3
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