Terbium (lithium zinc) distannide, TbLi1–xZnxSn2 (x = 0.2)

The new terbium (lithium zinc) distannide, TbLi1–xZnxSn2 (x = 0.2) crystallizes in the ortho­rhom­bic CeNiSi2 structure type with space group Cmcm and Pearson symbol oS16. Of the four independent 4c atom positions (m2m site symmetry), three are fully occupied by individual atoms (two by Sn and one by Tb atoms) and the fourth is occupied by Li and Zn atoms with a statistical distribution. The Tb coordination polyhedron is a 21-vertex pseudo-Frank–Kasper polyhedron. One Sn atom is enclosed in a tricapped trigonal prism, the second Sn atom is in a cubocta­hedron and the statistically distributed (Li,Zn) site is in a tetra­gonal anti­prism with one added atom. Electronic structure calculations were used for the elucidation of reasons for and the ability of mutual substitution of lithium and transition metals. Positive charge density was observed around the rare earth atom and the Li and Zn atoms, the negative charge density in the proximity of the Sn atoms

Penta­terbium lithium tris­tannide, Tb5LiSn3

The new ternary phase penta­terbium lithium tris­tannide, Tb5LiSn3, crystallizes in the hexa­gonal Hf5CuSn3 structure type, which is a ‘filled’ version of the binary RE 5Sn3 phases (Mn5Si3-type) (RE is rare earth). The asymmetric unit contains two Tb sites (site symmetries 3.2 and m2m), one Li site (site symmetry .m) and one Sn site (site symmetry m2m). The 14-vertex Frank–Kasper polyhedra are typical for Li and Tb atoms. The environment of the Sn atom is a pseudo-Frank–Kasper polyhedron with a coordination number of 13 for the tin atom. One of the Tb atoms is enclosed in a 17-vertex polyhedron. The metallic type of bonding was indicated by an analysis of the inter­atomic distances

LaZn12.37 (1), a zinc-deficient variant of the NaZn13 structure type

The title compound (lanthanum dodecazinc), LaZn12.37 (1), is confirmed to be a nonstoichiometric (zinc-deficient) modification of the NaZn13 structure type, in which one Zn atom (Wyckoff site 8b, site symmetry m ) has a fractional site occupancy of 0.372 (11). The other Zn atom (96i, m) and the La atom (8a, 432) are fully occupied. The coordination polyhedra of the Zn atoms are distorted icosa­hedra, whereas the La atoms are surrounded by 24 Zn atoms, forming pseudo-Frank–Kasper polyhedra. Electronic structure calculations indicate that Zn—Zn bonding is much stronger than La—Zn bonding

TbNb6Sn6: the first ternary compound from the rare earth–niobium–tin system

The title compound, terbium hexa­niobium hexastannide, TbNb6Sn6, is the first ternary compound from the rare earth–niobium–tin system. It has the HfFe6Ge6 structure type, which can be analysed as an inter­growth of the Zr4Al3 and CaCu5 structures. All the atoms lie on special positions; their coordination geometries and site symmetries are: Tb (dodeca­hedron) 6/mmm; Nb (distorted icosa­hedron) 2mm; Sn (Frank–Caspar polyhedron, CN = 14–15) 6mm and m2; Sn (distorted icosa­hedron) m2. The structure contains a graphite-type Sn network, Kagome nets of Nb atoms, and Tb atoms alternating with Sn2 dumbbells in the channels

2-[(2Z,3E)-2-Hy­droxy­imino-5-phenyl-2,3-dihydro-3-thienyl­idene]-2-phenyl­acetonitrile

In the crystal structure of the title compound, C18H12N2OS, centrosymmetric dimers are stabilized both by van der Waals inter­actions and by two types of inter­molecular O—H⋯N hydrogen bonds. In addition, an intra­molecular C—H⋯S hydrogen bond is observed. The dihedral angles between the central ring and the two pendant phenyl rings are 7.4 (1) and 45.06 (9)°

La5Zn2Sn

A single crystal of penta­lanthanum dizinc stannide, La5Zn2Sn, was obtained from the elements in a resistance furnace. It belongs to the Mo5SiB2 structure type, which is a ternary ordered variant of the Cr5B3 structure type. The space is filled by bicapped tetra­gonal anti­prisms from lanthanum atoms around tin atoms sharing their vertices. Zinc atoms fill voids between these bicapped tetra­gonal anti­prisms. All four atoms in the asymmetric unit reside on special positions with the following site symmetries: La1 (..m); La2 (4/m..); Zn (m.2m); Sn (422)

International cooperation in financial fraud investigation

The aim of the article is to formulate theoretical principles and practical recommendations for the implementation of international cooperation in the investigation of financial fraud. The subject of the study is international cooperation in the investigation of financial fraud. Methodology. The research is based on the use of general scientific and special-scientific methods and techniques of scientific knowledge. The historical and legal method enabled to determine the preconditions for the origin of financial fraud as a crime of international nature, the establishment of the institute of international cooperation in criminal proceedings. The comparative legal method enabled to compare doctrinal approaches to the differentiation of tasks and forms of international cooperation in the investigation of financial fraud. The system-structural method enabled to determine the tasks of the pretrial investigation bodies in the investigation of financial fraud considering the functional aspect of the relevant bodies and individuals. The methods of grouping and classification were the basis for the author's approach to the definition of features of financial fraud as a crime of an international nature. The technical legal method enabled to examine the state of affairs in the legal regulation of the application of international cooperation measures in the investigation of financial fraud at the international and national levels, to identify its shortcomings, which determine the problems of practical implementation, to develop recommendations aimed at their elimination. The results of the study revealed that improvement of the international cooperation in the investigation of financial fraud involves the use of new methods and means of investigation (legal proceedings within the framework of international legal assistance, joint investigation teams, etc.); working out effective interaction with the competent authorities of foreign countries and international organizations. It is important to conclude international cooperation agreements, including interagency agreements; to improve the national legislation to comply with the provisions of international law; to harmonize the legislation of Ukraine and European states. Practical implications. In the research, financial fraud is defined as a crime of an international nature; the problematic issues of its investigation are determined; features of international cooperation in the investigation of financial fraud; the areas of its efficiency improvement are suggested. Relevance/originality. The original author's approach to the formulation of theoretical principles and practical recommendations for the implementation of international cooperation in the investigation of financial fraud is the foundation for the elaboration of the most promising areas for the development of national legislation and practical activities in this sphere

Czech electric car industry analysis

The aim of the work is to identify internal and external factors affecting the electric vehicle industry in the Czech Republic. To identify internal factors, methods of microenvironment analysis, especially Porter's Five Forces model and Value Chain analysis, are applied. PESTEL analysis is used to determine macroenvironmental factors. The identified factors from the analysis of the micro and macro environmental methods are subsequently used as inputs into a SWOT analysis to summarize the overall situation of the electric vehicle industry in the Czech Republic.Cílem práce je identifikace vnitřních a vnějších faktorů odvětví elektrických vozidel ČR. K identifikaci vnitřních vlivů jsou aplikované metody Porter model 5 sil a analýza hodnotového řetězce. Pro určení faktorů vnějšího okolí je zpracovaná PESTEL analýza. Identifikované faktory z použitých metod analýzy mikra a makra okolí jsou využité pro vstup do SWOT analýzy ke shrnutí celkové situace elektromobilového odvětví ČR

Synthesis, crystal structure and hydrogenation properties of MgxLi3 − xB48 − y (x = 1.11, y = 0.40)

The ternary magnesium/lithium boride, MgxLi3 − xB48 − y (x = 1.11, y = 0.40, idealized formula MgLi2B48), crystallizes as its own structure type in P43212, which is closely related to the structural family comprising α-AlB12, Be0.7Al1.1B22 and tetragonal β-boron. The asymmetric unit of title structure contains two statistical mixtures Mg/Li in Wyckoff sites 8b with relative occupancies Mg:Li = 0.495 (9):0.505 (9) and 4a with Mg:Li = 0.097 (8):0.903 (8). The boron atoms occupy 23 8b sites and two 4a sites. One of the latter sites has a partial occupancy factor of 0.61 (2). Both unique Mg/Li atoms adopt a twelvefold coordination environment in the form of truncated tetrahedra (Laves polyhedra). These polyhedra are connected by triangular faces to four [B12] icosahedra. The boron atoms exhibit four kinds of polyhedra, namely pentagonal pyramid (coordination number CN = 6), distorted tetragonal pyramid (CN = 5), bicapped hexagon (CN = 8) and gyrobifastigium (CN = 8). At the gas hydrogenation of MgLi2B48 alloy, formation of the eutectic composite hydride LiBH4+Mg(BH4)2 and amorphous boron is observed. In the temperature range 543–623 K, the hydride eutectics decompose, forming MgH2, LiH, MgB4, B and H2