... spectra of NDs showed fast-decaying donor-acceptor pair recombination (DAPR) bands at around 410 nm. With longer delay and gate times, the broad band shifted to ca. 435 nm. All synthetic diamonds display luminescence from nickel-related defects centered at ca. 480 and 530 nm at room temperature (RT...

... that diamonds from the metal–carbon melt are characterized by inclusions of taenite and magnesiowüstite. The morphology of these diamonds is determined by the {111} layer-by-layer grown faces, and their indicator characteristics are nitrogen–vacancy and nickel-related (884 nm) centers at 1400 °C or nickel...

... with mafic and ultramafic rocks suggest a mantle source. The distribution of known diamond and nickel deposits is closely related to the zones of crustal weakness, and particularly to areas where two or more zones intersect. Such areas are exploration targets. GeoRef, Copyright 2008, American Geological...

..., coal, limestone, dolomite, mica, zinc, graphite but deficient to scarce resources of nickel, cobalt, molybdenum, copper, sulphur, potash, apatite, rock phosphate, gold, PGE’s, diamond etc., in spite of the vast obvious geological potential (OGP) blocks that exist in India. The OGP blocks have been...

...%) and reciprocally related to cobalt and nickel concentrations implying the presence of latter as solid solution in the structure of pyrite. The cobalt contents of the pyrite are comparable to those (up to 3.21 wt%) reported from the cobalt-bearing pyrites of the Kalyadi copper deposits of Dharwar craton of southern...

... and relatively low temperatures. Diamond crystals in the impactite are euhedral and may have formed through chemical vapor deposition (CVD) at very high temperatures. Nickel sulfide probably crystallized directly from sulfide vapor or quenched sulfide melts, under supercooled and reduced conditions...

... sidebands can be observed in yellow coated diamonds from Snap Lake–King Lake kimberlites in Canada ( Yelisseyev et al., 2004 ). It has been proposed that strain from nickel-related defects was contributing broad NV peaks. We confirmed the presence of nickel-related defects in our samples by detection...

... at about 737 nm by Si-V centres (a silicon ion next to a carbon vacancy), the Si coming presumably from the silica windows in the reactor. For diamonds grown by the HPHT method, a Ni-related doublet at about 883 and 885 nm can sometimes be seen, the nickel coming from the Fe–Ni metal catalyst often used...

... sector. The zero phonon lines (ZPL) of several defects are labeled. Specifically, the ZPL at 794 nm, which was observed with both the lasers excitations, has been attributed to the S2 and S3 nickel-related defects ( Kupriyanov et al. 1999 ). (Color online.) ...

...) Diamond Related Materials , Vol. 96, Fig. 1 , p. 209.] Although nitrogen and boron are the most studied impurities in HPHT diamonds, several other elements such as nickel, cobalt, silicon, and germanium can be introduced during synthesis, forming vacancy-containing defect complexes ( Collins...

... contains crowningshieldite along with magnetite-magnesioferrite, hematite, and graphite. A fracture was observed that extended from the inclusion to the diamond exterior, meaning that fluids, possibly kimberlite-related, could have penetrated into this fracture and altered the inclusion. Originally...

.... , Kalinin , A.A. , Pal’yanov , Yu.N. , 1999 . Photoluminescence study of annealed nickel- and nitrogen-containing synthetic diamond . Diamond Relat. Mater. 8 ( 7 ), 1301 – 1309 . Lang , A.R. , 1964 . A proposed structure for nitrogen...

..., molybdenum, nickel, REE, silver, tin, titanium, vanadium, zinc Yes Yes State/province Some reduction of production in significantly affected provinces Australia 123.1 69.8 10.2 Bauxite, coal, cobalt, copper, diamonds, gold, iron ore, lead, lithium, manganese, nickel, REE, silver, tin, titanium...

..., but under cold-subduction conditions, carbonate-bearing slabs can reach depths of 250 km or more, where the nickel content is higher. The absence of iron carbides can reduce the magnitude of carbon isotope fractionation three or four times, to 1.5–2.0‰, which is typical of fractionation between diamond...

... Geothermometry Garnet Diamond Madhya Pradesh JOURNAL GEOLOGICAL SOCIETY OF INDIA Vo1.52, Sept. 1998, pp. 273-278 Cluster Analysis and Nickel Thermometry of Garnet Xenocrysts from Majhgawan Diamondiferous Pipe, Panna District, Madhya Pradesh ABHTJEET MUKHERJEEi,K.S.RAOi,GAUTAM ROy2 and E.V.S.S.K.BABu3 INatl...

... . The effect of Nickel and cobalt on the aggregation of nitrogen in diamond . Diamond Relat. Mater. 7 , 299 – 304 . Fisher , T.P. , Hilton , D.R. , Zimmer , M.M. , Sharp , Z.D. , Walker , J.A. , 2002 . Subduction and recycling of nitrogen...

...-dependent ( Fisher and Lawson 1998 ), with nickel-related optical activity detected only in the {111} sectors ( Collins et al. 1990 )—this can be revealed by luminescence mapping ( Fig. 15 , 23 ). Hydrogen is a common impurity in diamond, with some natural diamonds reported to contain in excess of 1000...

..., cube, and possibly other crystal faces [ 4 , 17 – 19 ]. Both crystals from the development of internal growth sectors can contain differing impurity contents (of elements such as nitrogen, boron, and nickel). By the time that natural diamonds enter the jewelry industry, their geological...