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Received: 22 June 2020
Accepted: 22 June 2021
Online: 23 July 2021
H. Editor: R. Skála
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Original paper

Rudolf I. Mashkovtsev, Marianna I. Rakhmanova, Dmitry A. Zedgenizov

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

Journal of Geosciences, volume 66 (2021), issue 2, 117 - 126


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 NV0 and NV- centres 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.

Journal of Geosciences, Published by © Czech Geological Society, with support from the Czech Geological Survey.
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Policy: Open Access

ISSN: 1802-6222

E-ISSN: 1803-1943