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Pink-violet diamonds from the Lomonosovmine: morphology, spectroscopy, nature of colourстатья
- Авторы: Kriulina G.Yu, Vyatkin S.V., Vasilev E.A.
- Журнал: Journal of Mining Institute
- Том: 263
- Год издания: 2023
- Первая страница: 715
- Последняя страница: 723
- Аннотация: The article presents the results of the first comprehensive study of mineralogical and spectroscopic (IR, PL, EPR) characteristics of diamonds from the Lomonosov mine(Arkhangelskayapipe) with a unique pink, pink-violet colour. It isshown that all crystals belong to the IaA type, with a total nitrogen content in the range of 500-1500 ppm, with a low degree of aggregation. The colouris heterogeneous, concentrated in narrow twin layers. Itis presumably caused by the previously described M2centres. The colourshade is affected by the content of P1 paramagnetic centres(C-defect).Apositive correlation is observed between the coloursaturation and the intensity of W7 paramagnetic cen-tres. A convergent model of the formation of pink diamonds is assumed, according to which the determining factors are the ratio and concentration of structural impurities in the diamond, its thermal history,and conditions of plastic deformation, and not the origin of the diamond and the petrochemical properties of its host rocks.
- Добавил в систему: Криулина Галина Юрьевна