English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

New stannides CaTSn 2  (T = Rh, Pd, Ir) and Ca 2 PhSn 5  were prepared as single phase materials by a reaction o f the elements in glassy carbon crucibles under flowing purified argon. The four compounds were investigated by X-ray diffraction both on powders and single crystals and their structures were refined from single crystal data. The stannides CaTSn 2  (T = Rh, Pd, Ir) adopt the MgCuAl, structure with space group Cmcm: a = 434.1(1), b = 1081.7(3), c = 748.8(2) pm, wR2 = 0.040Ö, 451 F 2  values for CaRhSn 2 , a = 442.7(2), b = 1113.8(4), c = 745.6(2) pm, wR2 = 0.0318, 471 F ; values for CaPdSn 2 , and a = 429.5(1), b = 1079.5(3), c = 758.6(2) pm, wR2 = 0.0465, 455 F2 values for CaIrSn 2  with 16 variables for each refinement. Chemical bonding analysis leads to the description o f a distorted filled CaSni substructure in which the tin-tin bonding is modified by the insertion o f transition metal atoms into the planar calcium layers, favoring strong tin-transition metal bonding.  119 Sn Mössbauer spectra show single signals for CaTSn 2  (T = Rh, Pd, Ir) which are subjected to quadrupole splitting. The electron count o f the CaTSn 2  compounds correlates with the ll9Sn isomer shift. Ca 2 Pt 3 Sn 3  crystallizes with the Yb 2 Pt 3 Sn 5  type structure: Pnma, a = 734.8(1), b = 445.50(7), c = 2634.8(5) pm, wR2 = 0.0636, 1406 F 2  values and 62 variables. The platinum and tin atoms in Ca 2 Pt 3  Sns build a complex three-dimensional [Pt 3 Sn 5 ] polyanion in which the calcium cations fill distorted pentagonal and hexagonal channels. According to semi-empirical band structure calculations the strongest bonding interactions are found for the Pt-Sn contacts, follow ed by Sn-Sn bonding. The  119 Sn Mössbauer spectrum of Ca 2 Pt 3 Sn 5  shows two superimposed signals at δ = 2.10(3) and δ= 2.18(6) mm/s

New Stannides CaTSn2 (T = Rh, Pd, Ir) and Ca 2 Pt 3 Sn 5 - Synthesis, Structure and Chemical Bonding