Impact diamondNanostructureAmorphous carbonHigh-resolution transmission electron microscopyPopigai astroblemeHigh-resolution transmission electron microscopy was applied for the detailed nanostructural investigation of Popigai impact diamonds with the aim of revealing the nature of the amorphous carbon of the ...
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diamond/lonsdailete biphasesFor the first time, lonsdaleite-rich impact diamonds from one of the largest Popigai impact crater (Northern Siberia) with a high concentration of structural defects are investigated under hydrostatic compression up to 25 GPa. It is found that, depending on the nature ...
Popigai crater: origin and distribution of diamond-bearing impactites. Meteoritics & Planetary Science 33, 349-359.Masaitis V.L., 1998, Popigai crater: Origin and distribution of diamond-bearing impactites, Mete- oritics& Planetary Science, 33, s. 349-359....
Masaitis V.L., 1998, Popigai crater: Origin and distribution of diamond-bearing impactites, Mete- oritics& Planetary Science, 33, s. 349-359.Masaitis V. L. 1998 . Popigai crater: Origin and distribution of diamond-bearing impactites . Meteoritics & Planetary Science 33 : 349 – 359 ....
For the first time, 60 large diamond aggregates were found inside the Popigai meteorite crater during washing of alluvial deposits along the Dogoi river crossing the crater. These aggregates are similar in appearance to yakutites from the placers of Northern Yakutia (YPY), and we regard them...
Twenty impact diamond samples from the Popigai, Ries, and Lappajrvi astroblemes were analysed using cathodoluminescence (CL) at room temperature (RT). Five of the samples were further investigated at liquid nitrogen temperature (LNT). Cathodoluminescence images allowed for the discrimination of diamond...
Experimental/ diamondmeteorite cratersrockssandsediments/ impact diamondsPopigai Astroblemeschistose placer diamondssandy sedimentsUkrainemeteoritesIn the 1960s, the so-called ldquoschistoserdquo placer diamonds were found in sandy sediments of Ukraine. Their primary source remained unknown and their origin ...
diamondgraphitizationhigh temperatures and pressuresRaman spectroscopyGRAPHITELONSDALEITEPRESSUREExperimental data are presented on the Raman spectra and surface graphitization of impact diamonds of Popigai astrobleme that were heat-treated at 5.5 GPa in a wide temperature range (1500-2250 degrees C). It ...
For the first time, 60 large diamond aggregates were found inside the Popigai meteorite crater during washing of alluvial deposits along the Dogoi river crossing the crater. These aggregates are similar in appearance to yakutites from the placers of Northern Yakutia (YPY), and we regard them...