The Gallides SrRh2Ga2, SrIr2Ga2, and Sr3Ir4Ga4

The gallides SrRh₂Ga₂, SrIr₂Ga₂, and Sr₃Rh₄Ga₄ were obtained from the elements by induction melting and subsequent annealing. They were investigated by powder and single‐crystal X‐ray diffraction: CaRh₂B₂ type, Fddd, a = 573.2(1), b = 1051.3(1), c = 1343.7(2) pm, wR₂ = 0.0218, 398 F² values, 15 variables for SrRh₂Ga₂; a = 576.0(1), b = 1045.5(1), c = 1350.6(3) pm for SrIr₂Ga₂, and Na₃Pt₄Ge₄ type, I$\bar{4}$ 3m, a = 777.4(2) pm, wR₂ = 0.0234, 190 F² values, 11 variables for Sr₃Ir₄Ga₄. The gallides SrRh₂Ga₂ and Sr₃Ir₄Ga₄ exhibit complex, covalently bonded three‐dimensional [Rh₂Ga₂] and [Ir₄Ga₄] networks with short Rh–Ga (241–246 pm) and Ir–Ga (243–259 pm) distances. The strontium atoms fill large cages within these networks. They are coordinated by 8 Rh + 10 Ga in SrRh₂Ga₂ and by 4 Ir + 8 Ga in Sr₃Ir₄Ga₄. The structure of SrRh₂Ga₂ is discussed along with the monoclinic distortion variants HoNi₂B₂ and BaPt₂Ga₂ on the basis of a group‐subgroup scheme.     

ChemInform Abstract: Hexatellurium Rings in Coordination Polymers and Molecular Clusters: Synthesis and Crystal Structures of [M(Te6)]X3 (M: Rh,Ir; X: Cl,Br, I) and [Ru2(Te6)] (TeBr3)4(TeBr2)2.

Black crystals of [Rh(Te₆)]Br₃ (I), [Rh(Te₆)]I₃ (II), [Ir(Te₆)]Cl₃ (III), [Ir(Te₆)]Br₃ (IV), and [Ir(Te₆)]I₃ (V) are prepared from stoichiometric mixtures of Rh or Ir, Te, and TeX₄ (X: Cl, Br, I; evacuated silica tube, 300—350 °C, 7 d).     

ChemInform Abstract: Preliminary Crystal Structure of Mixed-Valency Sr4Ni3O9, the Actual Formula of the so-called Sr5Ni4O11.

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ChemInform Abstract: Intermetallic Compounds Ce4Ru3Ga3 and La3Ru2Ga2 with Crystal Structures of New Types.

Ce₄Ru₃Ga₃ (I) and La₃Ru₂Ga₂ (II) are synthesized by arc melting of the elements under Ar followed by annealing (873 K, 30 d).     

ChemInform Abstract: Crystal Structure of the Binuclear Fluoro Compound Cs3Ga2F9.

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.     

ChemInform Abstract: Ab initio Structure Determination of Mg10Ir19B16.

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.     

ChemInform Abstract: Preparation and Crystal Structure of a New Acentric Caesium Gallium Hydrogen Phosphate Containing Phosphoric Acid,Cs2Ga(H2PO4)(HPO4)2. times.H3PO4×0.5 H2O.

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.     

ChemInform Abstract: Gold-Tin Ordering in SrAu2Sn2.

The solid solutions SrAu_xSn_4-x (1.7 ≤ x ≤ 2.2) are prepared by high-frequency melting of the elements (Nb ampules, 950—1150 K, 2—12 h).     

ChemInform Abstract: Synthesis,Structure, and Electronic Structure of CsAgGa2Se4.

The new title compound is prepared from a mixture of AgGaSe₂ (obtained from the elements at 900 °C, 2 d) and CsI in the molar ratio 1:2 (silica tube, Ar, 800 °C, 48 h).     

ChemInform Abstract: Glass Formation in the System BaS-Ga2S3-GeS2 and the Structure of Ba2. 7Ga5.4Ge3.6S18.

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.     

ChemInform Abstract: Rhodium‐Rich Germanides RERh4Ge2 (RE: Y,Gd—Lu): Structure and Bonding.

The title compounds are prepared by arc‐melting of the elements and subsequent annealing (evacuated silica tube, 970 K, 5d).     

ChemInform Abstract: Effect of the Framework Flexibility on the Centricities in Centrosymmetric In2Zn(SeO3)4 and Noncentrosymmetric Ga2Zn(TeO3)4.

Crystals of In₂Zn(SeO₃)₄ (I) and Ga₂Zn(TeO₃)₄ (II) are prepared by solid state reaction of ZnO, In₂O₃ or Ga₂O₃, and SeO₂ or TeO₂ (silica tubes, 600—700 °C, 48 h).     

ChemInform Abstract: Synthesis and Crystal Structure of the New Complex Oxide Ca7Mn2.14Ga5.86O17.93.

The title compound is synthesized by solid state reaction of MnO, Ga₂O₃, and CaO (1000 °C, 150 h).     

ChemInform Abstract: Crystal Structure of Yttrium-Scandium-Gallium Garnet.

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ChemInform Abstract: Synthesis and Structure of Two New Layered Ternary Nitrides,SrZrN2 and SrHfN2.

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.     

ChemInform Abstract: Crystal Structures of SeCl+3SbCl-6, SeBr+3GaBr-4, PCl+4SeCl-5 and (PPh+ 4)2SeCl2-4×2 MeCN.

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.