Nitridochromate(IV): LiSr[CrN].

The quaternary nitridochromate(IV) LiSr[CrN] crystallizes in a new structure type with the non-centrosymmetric space group 2 (no. 4) with = 5.5685(7) Å, = 5.

Polymer-dispersed liquid crystal elastomers as moldable shape-programmable material.

The current development of soft shape-memory materials often results in materials that are typically limited to the synthesis of thin-walled specimens and usually rely on complex, low-yield manufacturing techniques to fabricate macro-sized, solid three-dimensional objects. However, such geometrical limitations and slow production rates can significantly hinder their practical implementation. In this work, we demonstrate a shape-memory composite material that can be effortlessly molded into arbitrary shapes or sizes.

Non-innocent cyanido ligands: tetracyanidoferrate(-II) as carbonyl copycat.

While a negative oxidation state occurs rarely for metals in general, this is commonly known for metal carbonyl anions, carbonyl metalates. Although CO and CN are isoelectronic, cyanidometalates usually do not exhibit metal centers with negative oxidation states. However, we report on the electron-rich tetrahedral tetracyanidoferrate(-II) anion [Fe(CN)], which was stabilized in (SrN)[Fe(CN)] (space group 3, = 702.

Composition dependent polymorphism and superconductivity in Y{Rh,Ir}Ge.

Polymorphism is observed in the YRhGe series. The decrease of Y-content leads to the transformation of the primitive cubic YRhGe [ = 0.6, space group 3̄, = 8.

The Intermetallic Semiconductor -IrGa: a Material in the State.

The compound IrGa was synthesized by direct reaction of the elements. It is formed as a high-temperature phase in the Ir-Ga system. Single-crystal X-ray diffraction analysis confirms the tetragonal symmetry (space group 4 , No.

Type-II Clathrate Na Ge from a Redox-Preparation Route.

The metastable type-II clathrate Na Ge was obtained from Na Ge by applying a two-step procedure. At first, Na Ge was reacted at 70 °C with a solution of benzophenone in the ionic liquid (IL) 1,3-dibutyl-2-methylimidazolium-bis(trifluoromethylsulfonyl) azanide. The IL was inert towards Na Ge , but capable of dissolving the sodium salts formed in the redox reaction.

Tricyanidoferrates(-IV) and Ruthenates(-IV) with Non-Innocent Cyanido Ligands.

Exceptionally electron-rich, nearly trigonal-planar tricyanidometalate anions [Fe(CN) ] and [Ru(CN) ] were stabilized in LiSr [Fe(CN) ] and AE [M(CN) ] (AE=Sr, Ba; M=Fe, Ru). They are the first examples of group 8 elements with the oxidation state of -IV. Microcrystalline powders were obtained by a solid-state route, single crystals from alkali metal flux.

The impact of boron atoms on clathrate-I silicides: composition range of the borosilicide KBSi.

The clathrate-I borosilicide KBSi (0.8 ≤x≤ 1.2 and 6.

Cage Adaption by High-Pressure Synthesis: The Clathrate-I Borosilicide RbBSi.

RbBSi forms under high-pressure, high-temperature conditions at = 8 GPa and = 1273 K. The new compound (space group 3̅, = 9.9583(1) Å) is the second example for a clathrate-I borosilicide.

Crystal Structure and Physical Properties of the Cage Compound HfBIr.

HfBIr crystallizes with a new type of structure: space group , = 5.6300(3) Å, = 11.2599(5) Å, and = 3.

Micro-Scale Device-An Alternative Route for Studying the Intrinsic Properties of Solid-State Materials: The Case of Semiconducting TaGeIr.

An efficient application of a material is only possible if we know its physical and chemical properties, which is frequently obstructed by the presence of micro- or macroscopic inclusions of secondary phases. While sometimes a sophisticated synthesis route can address this issue, often obtaining pure material is not possible. One example is TaGeIr, which has highly sample-dependent properties resulting from the presence of several impurity phases, which influence electronic transport in the material.

Structural Peculiarities and Thermoelectric Study of Iron Indium Thiospinel.

The homogeneity range of ternary iron indium thiospinel at 873 K was investigated. A detailed study was focused on two distinct series (y=z): 1) a previously reported charge-balanced (In □ ) [In Fe ] S (A1-series; □ stands for vacancy; the abbreviations "tetr" and "oct" indicate atoms occupying tetrahedral 8a and octahedral 16d sites, respectively) and 2) a new charge-unbalanced (In □ ) [In Fe ] S (A2-series). Fe atoms were confirmed to exclusively occupy an octahedral position in both series.

In-Cage Interactions in the Clathrate Superconductor Sr Si.

The clathrate I superconductor Sr Si is obtained under high-pressure high-temperature conditions, at 5 GPa and temperatures in the range of 1273 to 1373 K. At ambient pressure, the compound decomposes upon heating at T=796(5) K into Si and SrSi . The crystal structure of the clathrate is isotypic to that of Na Si .

Unconventional Metal-Framework Interaction in MgSi.

The silicon-rich cage compound MgSi was obtained by high-pressure high-temperature synthesis. Initial crystal structure determination by electron diffraction tomography provided the basis for phase analyses in the process of synthesis optimization, finally facilitating the growth of single crystals suitable for X-ray diffraction experiments. The crystal structure of MgSi (space group Cmme, Pearson notation oS24, a=4.

Structural stability and thermoelectric performance of high quality synthetic and natural pyrites (FeS).

Synthetic bulk and natural pyrite from the hydrothermal mine in Schönbrunn (Saxony, Germany) are confirmed to be stoichiometric FeS2 compounds and stable (for thermoelectric applications) up to ∼600 K by combined thermal, chemical, spectroscopic and X-ray diffraction analyses. Natural pyrite with a small amount (<0.6 wt%) of well-defined transition metal carbonates revealed characteristics of a nondegenerate semiconductor and is suitable as a model system for the investigation of thermoelectric performance.

Ferromagnetic -FeMnN: High-Pressure Synthesis, Hardness and Magnetic Properties.

The iron manganese nitride FeMnN was obtained by high-pressure-high-temperature synthesis from -FeN and elemental Mn at 15(2) GPa and 1573(200) K. The phase crystallizes isostructural to binary -FeN. In comparison to the corresponding binary iron nitride, the microhardness of -FeMnN is reduced to 6.

Indium thiospinel In□InS- structural characterization and thermoelectric properties.

A detailed study of polycrystalline indium-based In□InS (x = 0.16, 0.22, 0.

Lutetium Trigermanide LuGe: High-Pressure Synthesis, Superconductivity, and Chemical Bonding.

LuGe was obtained under high-pressure and high-temperature conditions at pressures between 8(1) and 14(2) GPa and at temperatures in the range from 1100(150) to 1500(150) K. The high-pressure phase is isotypic to DyGe and decomposes at ambient pressure and T = 690 K mainly into ( cF8)Ge and LuGe. Chemical bonding analysis of LuGe reveals two-center electron-deficient Ge-Ge bonds, multicenter polar Lu-Ge interactions, and lone pairs on germanium.

Tracking aluminium impurities in single crystals of the heavy-fermion superconductor UBe.

The influence of Al incorporation on the heavy fermion superconductor UBe was investigated to explain the sample dependence of physical properties. Clear evidence for incorporated Al in flux-grown UBe single crystals is presented by results from X-ray diffraction, nuclear magnetic resonance and X-ray spectroscopy. The increase of the lattice parameter and the concomitant change of the superconducting properties are caused by substitution of Be in the compound by 1-2 at.

Ca [Mn N ] and Ca [Mn N ]: Structural Complexity by 2D Intergrowth.

Two new calcium nitridomanganates, Ca [Mn N ] (P3, a=11.81341(3) Å, c=5.58975(2) Å, Z=1) and Ca [Mn N ] (P3‾ , a=39.

Cluster Formation in the Superconducting Complex Intermetallic Compound BePt.

Materials with the crystal structure of γ-brass type (CuZn type) are typical representatives of intermetallic compounds. From the electronic point of view, they are often interpreted using the valence electron concentration approach of Hume-Rothery, developed previously for transition metals. The γ-brass-type phases of the main-group elements are rather rare.

Two-gap superconductivity in Ag MoS Chevrel phase.

The superconducting properties of [Formula: see text]MoS [[Formula: see text]] Chevrel phase [[Formula: see text] K] are studied on a sample compacted by spark plasma sintering. Both lower ([Formula: see text] mT) and the upper [[Formula: see text] T] critical magnetic fields are obtained from magnetization and electrical resistivity measurements for the first time. The analysis of the low-temperature electronic specific heat indicates [Formula: see text]MoS to be a two band superconductor with the energy gaps [Formula: see text] meV (95%) and [Formula: see text] meV (5%).

Tuning a sign of magnetoelectric coupling in paramagnetic NH(CH)AlCr(SO) × 6HO crystals by metal ion substitution.

Hybrid organometallic systems offer a wide range of functionalities, including magnetoelectric (ME) interactions. However, the ability to design on-demand ME coupling remains challenging despite a variety of host-guest configurations and ME phases coexistence possibilities. Here, we report the effect of metal-ion substitution on the magnetic and electric properties in the paramagnetic ferroelectric NH(CH)Al Cr (SO) × 6HO.