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RMS Annual Session combined with the Fedorov Session 2014
Saint Petersburg, Russia
7-9 October 2014
2014minsoc.ru
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Structural defects and their distribution in cubic diamonds of variety II in cubic diamonds from placers of NE of Siberian platform: results of IR microspectroscopy

RMS-DPI code:  2014-1-80-0
Scientific session:  M3. MIneralogy ad geochemistry of diamond deposits
Author listing:  Shiryaev A.A., Titkov S.V., Zudina N.N., Zudin N.G., Solodova Y.P.
Principal author:  Shiryaev Andrey Albertovich
Language:  Russian
Abstract - Summary 
(short description):
IR-microspectroscopy was used to investigate gem quality cubic diamonds from placers of NE Siberia. The studied diamonds contain not only main -, -defects and, in some cases, B-defects, but also relatively rare centers X (N+ ion), and Y [Hainschwang et al., 2012], peaks in the 1350-1380 m-1 range, and various types of Amber centers. Integral spectra suggest that nitrogen concentration in these diamonds is relatively low: 60-265 ppm. Micro-IR investigation revealed highly heterogeneous nitrogen distribution in all the crystals. The general trend consists of gradual decrease of total N concentration and of A-defects fraction from growth center towards periphery; N concentration in the center may reach 990 ppm, being much higher than the average value. In peripheral zones the -, Y-, -, and Amber centers appear. Their presence indicate short duration of post-growth annealing period.
 
Date of presentation:  08/10/2014
Presentation Place:  Mining University, Hall 4312
 
RMS-DPI code:  2014-1-80-0
File of proceedings 
(PDF): 
 169 K
Status:  printed
Revised:  29/06/2014
Accepted:  31/08/2014
Published on-line:  29/12/2015
Permanent address of publication:  http://www.minsoc.ru/2014-1-80-0/
Contact author(s):  Shiryaev, Andrey Albertovich
 

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