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

The plumbides Ca T Pb 2  ( T  = Rh, Pd), Eu T Pb 2  ( T  = Rh, Pd, Pt), Sr T Pb 2  ( T  = Rh, Pd, Pt) and Ba T Pb 2  ( T  = Pd, Pt) were obtained by direct reactions of the elements in sealed tantalum tubes in an induction furnace. The moisture sensitive polycrystalline samples were characterized by X-ray powder diffraction. They crystallize with the orthorhombic MgCuAl 2 -type structure, space group  Cmcm . The structures of CaRhPb 2  ( a  = 433.78(3),  b  = 1102.06(8),  c  = 798.43(6) pm,  wR  = 0.0285, 432 F 2  values and 16 variables) and EuPdPb 2  ( a  = 457.24(5),  b  = 1158.27(13),  c  = 775.73(8),  wR  = 0.0464, 464 F 2  values and 16 variables) were refined from single crystal X-ray diffractometer data. The characteristic structural motif is the distorted tetrahedral substructure built up by the lead atoms with Pb–Pb distances of 326–327 pm in CaRhPb 2  and of 315–345 pm in EuPdPb 2 . With increasing size of the alkaline earth (Eu) cation, the lead substructure becomes more anisotropic with a shift of the [ T Pb 2 ] polyanions from three- to two-dimensional, leading to significantly increased moisture sensitivity. Temperature dependent magnetic susceptibility studies reveal Pauli paramagnetism for SrRhPb 2 , SrPtPb 2 , BaPdPb 2  and BaPtPb 2 . EuRhPb 2  and EuPdPb 2  are Curie–Weiss paramagnets with stable divalent europium as is also evident from  151 Eu Mössbauer spectra. EuRhPb 2  is a ferromagnet with  T  C  = 17.7(2) K, while EuPdPb 2  orders antiferromagnetically at  T  N  = 15.9 K. This is in agreement with the full magnetic hyperfine field splitting of the  151 Eu Mössbauer spectra at  T  = 6 K.

zeitschrift für naturforschung b

Ternary plumbides  AT Pb 2  ( A  = Ca, Sr, Ba, Eu;  T  = Rh, Pd, Pt) with distorted, lonsdaleite-related substructures of tetrahedrally connected lead atoms