Toward accurate thermochemical models for transition metals: G3Large basis sets for atoms Sc-Zn Density functional study of mononitrosyls of first-row transition-metal atomsThe sign and strength of magnetic interactions not only between nearest neighbors, but also for longer-range neighbors in the Cr 1/3 NbS 2 intercalation compound have been calculated on the basis of structural data. It has been found that left-handed spin helices in Cr 1/3 NbS 2 are formed from strength-dominant at low temperatures antiferromagnetic (AFM) interactions between triangular planes of Cr 3þ ions through the plane of just one of two crystallographically equivalent diagonals of side faces of embedded into each other trigonal prisms building up the crystal lattice of magnetic Cr 3þ ions. These helices are oriented along the c axis and packed into two-dimensional triangular lattices in planes perpendicular to these helices directions and lay one upon each other with a displacement. The competition of the above AFM helices with weaker inter-helix AFM interactions could promote the emergence of a long-period helical spin structure. One can assume that in this case, the role of Dzyaloshinskii-Moriya interaction consists of final ordering and stabilization of chiral spin helices into a chiral magnetic soliton lattice. The possibility of emergence of solitons in M 1/3 NbX 2 and M 1/3 aX 2 (M ¼ Cr, V, Ti, Rh, Ni, Co, Fe, and Mn; X ¼ S and Se) intercalate compounds has been examined. Two important factors caused by the crystal structure (predominant chiral magnetic helices and their competition with weaker inter-helix interactions not destructing the system quasi-one-dimensional character) can be used for the crystal chemistry search of solitons. V C 2014 AIP Publishing LLC. [http://dx.