...Felix Kaminsky; Richard Wirth Abstract The first finds of iron nitrides and carbonitride as inclusions in lower-mantle diamond from Rio Soriso, Brazil, are herein reported. These grains were identified and studied with the use of transmission electron microscopy (TEM), electron diffraction analysis...

... be the most nitrogen-rich iron compound under core conditions. An iron carbonitride Fe 7 (C,N) 3 found as a mantle-derived diamond inclusion implies that β-Fe 7 N 3 and Fe 7 C 3 may form a continuous solid solution in the mantle deeper than 1000 km depth. Diamond formation may be related to the presence...

...Dmitry A. Zedgenizov; Konstantin D. Litasov In the highlighted paper, Kaminsky and Wirth (2017) present new data on unique inclusions of iron nitrides and carbonitride in association with iron carbide, silicon carbide, and exotic Cr-Mn-Fe oxides in a “superdeep” diamond from Rio Soriso...

... in ε-Fe 3 N does not alter its structure, resulting in the formation of iron carbonitride ε-Fe 3 (C,N) ( Jack 1948 ). In Fe 3 C, iron atoms adopt an hcp arrangement, while carbon atoms occupy a trigonal prismatic site. This configuration leads to a very low solubility of nitrogen in Fe 3 C under...

... additional spots between ( h 00) reflections and (010) and (210) reflections, which can be indexed as (100) and (110) reflections. D) Iron carbonitride in foil # 2053 with the zone axis [010]. ...

... at.%, with the N/(C+N) ratio varying from 0.37 to 0.60. These minerals, in fact, are not carbides, but nitrocarbides and carbonitrides. Nitrogen also occurs as fluid inclusions ( Kaminsky et al . 2013 , and this study - see Fig. 1d ). These facts suggest the importance of nitrogen in the lower mantle...

... greater than 250 km ( Rohrbach et al. 2007 ). Based on the presence of iron nitrides and carbonitrides in meteorites and deep diamond inclusions, nitrogen may be distributed heterogeneously and enriched in metal phases in the Earth’s interior ( Li and Keppler 2014 ; Litasov et al. 2017 ; Rubin and Ma...

.... Marshintsev V.K. ( 1995 ): Carbon isotopic composition and origin of SiC from kimberlites of Yakutia, Russia . Geochim. Cosmochim. Acta , 59 , 781 – 791 . Mazzoni A.D. Aglietti E.F. ( 1997a ): Carbonitriding of andalusite: phases involved and reaction mechanism . Materials Chem. Phys...

... the NASA Stardust mission to comet 81P/Wild 2 ( Chi et al., 2009 ). At site 2, the V-Nb-osbornite is probably a carbonitride, because it contains 11 wt% carbon. Pure osbornite (TiN) is an extremely rare mineral that has been found extraterrestrially as comet dust ( Chi et al., 2009 ) or as trace...

...). However, N quantification has to be considered as just 242 qualitative and with no other evidence, this hypothesis can be supported. Earlier, we demonstrated the 243 significant role of nitrogen in deep Earth, where it forms nitrides, carbonitrides (Kaminsky and Wirth, 244 2017) and even native nitrogen...

... photocatalysis in nitrogen-doped titanium oxides . Science , 293 , 269 – 271 . Chagas , C. A. , Pfeifer , R. , Rocha , A. B. , & Teixeira da Silva , V. ( 2012 ). Synthesis of niobium carbonitride by thermal decomposition of guanidine oxaloniobate and its application...

...) carbides, titanium carbonitrides, SiC, nickel and iron silicides, refractory metal nuggets (RMNs), iron-rich metal (FeNiSi), and intergrowths of these ( Bernatowicz et al. 2006 ). In many cases, the other phases form as coatings or subgrains on existing TiC surfaces. Sometimes multiple iron-rich metal...

... , 599 – 600 . Khabashesku V.N. Margrave J.L. ( 2002 ): Carbonitride nanomaterials, thin films and solids . Adv. Eng. Mater. , 4 ( 9 ), 671 – 675 . Khvostantsev L.G. Vereshchagin L.F. Novikov A.P. ( 1977 ): Device of toroid type for high pressure generation . High...