Tin Flux, Crystal Structure, Magnetic Properties, Structural Relationships U Cr6P4 was prepared from a tin flux in two forms at low (a) and high (ß) temperatures (880 °C and 1000 °C), respectively. The crystal structures o f both m odifications were deter mined from single-crystal data. a-U C r6P4: P6m 2 (N o. 187), a = 698.5(3) pm, c = 350.8(1) pm, Z = 1, R = 0.052 for 18 variable parameters and 410 structure factors; /?-UCr6P4: Pmmn (N o. 59), a = 698.6(1) pm, b = 350.85(4) pm, c = 1196.1(2) pm, Z = 2, R = 0.047 for 21 variables and 656 structure factors. Although the lattice constants o f both m odifications are closely re lated, the two forms can be transformed into each other only by a very sluggish, reconstructive phase transformation. Nevertheless, both structures have very similar coordination polyhedra. The U atom s have 6 P neighbours in trigonal prismatic arrangement. H a lf o f the Cr atoms have tetrahedral, the other half square pyramidal P coordinations. As is typical for phosphides with high metal content, all metal atoms additionally have many metal neighbours. The P at oms are located in trigonal prisms o f metal atom s with two or three additional metal atoms outside the rectangular faces o f the prisms. Both m odifications o f UCr6P4 show relatively high, almost temperature independent paramagnetism, as is frequently observerd for intermetallic phases o f uranium.

The article presents a new diagnostic method of a motor starter based on the analysis of the starter’s power and the Hall effect. Using the Matlab Simulink program the wear and tear impact of the starter sleeves on power characteristics was simulated. For the analysis of the flux propagation and the distribution of magnetic induction for selected states of the wear and tear of the sleeve the QuickField program was used. Within the experimental tests, registration of the distribution of magnetic induction was conducted by the Hall sensor placed in the link slot. The model and the tests made it possible to develop diagnostic patterns within the OBD diagnostics.

The article presents considerations for improving the reliability of means of transport after introducing significant structural changes in the installation of vehicles and functioning of the embedded electrical equipment. The consequence of introducing electrical and electronic equipment to vehicles is an increased demand for energy. Uncontrolled consumption of electricity can lead to significant decline in availability. Therefore, the necessity arises of energy management through an additional function of some electrical equipment and implementation of modern design and technology according to the requirements of safety and environmental protection.

The article presents the extension of the measurement capabilities of two selected lab stands intended for the demonstration of a vehicle air conditioning system and automotive ignition systems. The modular structure of the stands allows to extend their measuring and research functionality of thermal imaging diagnostics. Such an extension of the scope of electrical equipment in stands also allows enrichment of the didactic program by expand of laboratory exercises. In the article was presented and discussed additional samples of thermograms taken at the stands.

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