Metamagnetic transition in single-crystalline UIr[Formula: see text]Si[Formula: see text].

A single crystal of the ternary uranium silicide UIr[Formula: see text]Si[Formula: see text] was studied by means of of X-ray diffraction, magnetization, heat capacity and electrical transport measurements. The studied compound orders antiferromagnetically at the Néel temperature of 5.5 K and undergoes a metamagnetic transition at 1.

Hybrid Chlorides with Methylhydrazinium Cation: [CHNHNH]CdCl and Jahn-Teller Distorted [CHNHNH]CuCl.

The synthesis, structural, phonon, optical, and magnetic properties of two hybrid organic-inorganic chlorides with monoprotonated methylhydrazinium cations (CHNHNH, MHy), [CHNHNH]CdCl (MHyCdCl), and [CHNHNH]CuCl (MHyCuCl), are reported. In contrast to previously reported MHyCl ( = Mn, Ni, and Co) analogues, neither compound undergoes phase transitions. The MHyCuCl has a crystal structure familiar to previous crystals composed of edge-shared 1D chains of the [CuClN] octahedra.

Dielectric switching in correlation with the structural phase transitions in tetrapropylammonium perchlorate.

The crystals of the tetrapropylammonium perchlorate ([(CHCHCH)N]ClO, TePrAClO) compound undergo two reversible phase transitions: at = 284 K and at = 445 K. The observed phase transitions and distinct dielectric and relaxation effects are due to the dynamic motions of the organic cations and anionic framework. The crystals become ordered at low temperatures, then disordered at room temperature (propyl chains of the organic part as well as perchlorate ions are disordered over the mirror plane at = 1/4 and 3/4) and highly disordered at high temperatures.

Crystal structure and enantiomeric layer disorder of a copper(I) nitrate π-coordination compound.

The novel π-coordination compound [Cu(m-dmphast)NO], where m-dmphast = 5-(allylthio)-1-(3,5-dimethylphenyl)-1H-tetrazole, is characterized using single-crystal X-ray diffraction and crystallizes in a noncentrosymmetric space group. Additionally, for the first time in this group of materials, the streaks of X-ray diffuse scattering in the reciprocal space sections were observed and described. This gave the possibility for a deeper insight into the local structure of the title compound.

Crystal structure of rare earth and group III nitride alloys by ab initio calculations.

The ground state phases of ternary alloys of rare earth and group III nitride semiconductors have been investigated within the density functional theory. The most energetically favorable crystal phases among possible cubic and hexagonal structures, i.e.