This paper discusses results from mineralogic, petrographic, and petrochemical studies of diamond-bearing volcanic rocks that were erupted by the 2012–2013 Tolbachik Fissure Eruption. This is the...

The extinction spectra of Zn nanoparticles, which were formed by the method of magnetron sputtering on molten quartz, KU-2 grade quartz glass, and sapphire substrates are obtained. The...

A complex mineralogical geochemical study of the bone detritus of large Pleistocene mammals inhabiting the Pechora Fore-Urals, the northernmost European part of their geographical range, is performed

N3 center luminescence quenching by the main types of defects (A and B1) related to nitrogen impurity in natural diamond was studied by monitoring the luminescence yield and using the Raman scattering intensity as a measure of the exciting radiation intensity. The luminescence yield from the N3 centers decreases by a factor of about 3000 when the concentration of nitrogen in the form of type A and B1 defects in natural diamond increases from 0.008 to 0.1 at. %.

Analysis of internal structure in large IIb-type high pressure-high temperature (HPHT) synthetic single-crystal diamond are presented. The concentration of boron impurity in different growth sectors varies from 0.02 to 10.3 ppm. It is shown that in the manufacturing of synthetic diamond plates, internal inhomogeneities of the diamond should be taken into account; plates with different characteristics can be cut from one diamond, each of which can be used for its own purpose.