12187-02-9

Usage

InChI:InChI=1/2Sm.3Te/q2*+3;3*-2

Upstream product

• 7440-19-9 samarium 
• 14683-12-6 tellurium 
• 22750-57-8 cesium azide 
• 15690-63-8 cesium chloride 
• 7647-14-5 sodium chloride 
• 13765-24-7 samarium(III) fluoride 

Relevant academic research and scientific papers

Physicochemical study of SmTe-In2Te3 and SmTe-InTe systems

SmTe-In2Te3 and SmTe-InTe quasi-binary joins were studied using physicochemical methods. The SmTe-In2Te3 system forms two compounds, SmIn2Te4 and SmIn 4Te7, which melt

Cs2Gd6N2Te7: The first quaternary nitride telluride of the lanthanides

The first quaternary nitride telluride with trivalent gadolinium, Cs2Gd6N2Te7, was obtained by the reaction of metallic gadolinium with cesium azide, elemental tellurium, and gadolinium trichloride as well as cesium chloride as flux at 900 °C for 7 days in evacuated silica tubes. Single crystals occur as long black needles and crystallize in the monoclinic space group C2/m (a = 2403.1(2) pm, b = 424.03(3) pm, c = 1142.91(7) pm, β = 103.709(4)°, Z = 2). Three crystallographically different Gd3+ cations constitute the structure, two are coordinated by one N3- (d(Gd(1/2)-N) = 217 pm) and five Te2- anions (d(Gd(1/2)-Te) = 305-326 pm), and the third Gd3+ by two N3- (d(Gd(3)-N) = 244 pm) and four Te2- anions (d(Gd(3)-Te) = 316-317 pm), all forming distorted octahedra about Gd3+. The Cs+ cation shows a perfect bicapped trigonal prism (C.N. = 8, d(Cs-Te) = 383-431 pm) as coordination sphere. Two of these polyhedra are condensed via a common (non-capped) rectangular face building up double prisms [Cs2Te12]22-. Further linkage via triangular faces (along [0 1 0]) and two of the four caps (along [0 0 1]) results in corrugated layers [Cs2Te7]12- running parallel to (1 0 0). However, the main feature of the crystal structure comprises N3--centered (Gd3+)4 tetrahedra (d(N-Gd) = 217 pm (2×) and 244 pm (2×); {measured angle}(Gd-N-Gd) = 107° (2 + 2 + 1×) and 121° (1×)), which are connected via two vertices each to build up one-dimensional infinite chains ∞1{ [ N (Gd 1)1 / 1t (Gd 2)1 / 1t (Gd 3)2 / 2v ]6 + } (t = terminal, v = vertex-shared) along [0 1 0] like in the structure of the M3NCh3-type nitride chalcogenides with M = La-Nd, Sm, Gd-Dy, and Ch = S, Se.

Synthesis of copper, silver, and samarium chalcogenides by mechanical alloying

CuInX2 (X = S, Se, Te), Ag2S, Ag2Se, Ag3Te2, Ag1.9Te, AgCuSe, Sm3Se4, Sm2Se3, and SmTe were synthesized by a mechanical alloying method, using a high-energy planetary ball mill. The compounds were obtained by milling mixtures of the elements with desired ratios in agate or Cu-Be vials for 60-180 min. Copyright

THERMODYNAMICS OF VAPORIZATION OF SAMARIUM(II) TELLURIDE AND YTTERBIUM(II) TELLURIDE: A DISCUSSION OF THE THERMOCHEMISTRY OF THE DIVALENT LANTHANOID AND ALKALINE EARTH TELLURIDES.

The congruent vaporization of the solid monotellurides of ytterbium and samarium, both of practically stoichiometric composition, was studied over the temperature ranges 1606-1764 and 1732-1922 K, respectively, by the Knudsen effusion weight-loss technique. Using enthalpy and entropy data from the literature for gaseous LnTe, Ln, Te//2, and Te, and estimated data for solid LnTe(Ln equals Yb, Sm) it could be concluded from thermodynamic calculations that within the given temperature ranges-Ln and Te are the principal vapor species and that less than equivalent to 2. 8 and less than equivalent to 0. 9 mol percent of the vapor is present as YbTe and SmTe, respectively.

BAND EDGE EXCITION SPECTRA IN Sm MONOCHALCOGENIDES.

Reflection spectra have been measured on semiconducting SmS, SmSe and SmTe single crystals at 2 K in the photon energy region from 3 to 6 ev. From a comparison of the spectra in these Sm monochalcogenides with those in BaS and BaSe, the reflection peaks observed in this photon energy region are identified as the Wannier excitons associated with the band-edges at the X-point and the GAMMA -point. Temperature dependence of the reflection peaks and the electroreflectance spectra of SmSe support this identification. The energy band structure of semiconducting Sm monochalcogenides is discussed on the basis of the observed exciton spectra.