- Titel
- Ternary magnesium gallides
- Untertitel
- synthesis, crystal chemistry and properties of CaMgGa, SrMgGa, BaMgGa and YbMgGa
- Zitierfähige Url:
- https://nbn-resolving.org/urn:nbn:de:bsz:15-qucosa2-987881
- Quellenangabe
- Zeitschrift für anorganische und allgemeine Chemie
Erscheinungsjahr: 2023
Heft: 649
Artikelnummer: e202200361 - Erstveröffentlichung
- 2023
- Abstract (EN)
- The gallides CaMgGa, SrMgGa, BaMgGa and YbMgGa were synthesized from the elements in sealed tantalum ampoules in muffle furnaces. The phase purity of the samples was checked by powder X-ray diffraction. CaMgGa and YbMgGa crystallize with the ZrNiAl type structure, space group P62m, whereas SrMgGa and BaMgGa adopt an ordering variant of the Cu2Sb/ PbFCl type, space group P4/nmm. The structures of SrMg0.884(7)- Ga1.116(7) (a=459.23(9), c=792.43(12) pm, wR2=0.0371, 226 F2 values, 11 variables) and YbMgGa (a=774.55(7), c=411.95(4) pm, wR2=0.0329, 342 F2 values, 15 variables) were refined from single crystal X-ray diffractometer data. Refinement of the occupancy parameters indicated a small degree of Mg/Ga mixing on the 2a site for the strontium compound. The [MgGa] substructures in both compounds are composed of condensed Mg@Ga4 tetrahedra with 4×287 pm Mg Ga in SrMg0.884Ga1.116 vs 2×282 and 2×296 pm in YbMgGa. The SrMgGa structure has a stacking of layers of edge-sharing Mg@Ga4 and Sr4 tetrahedra. Electronic structure calculations indicate a net charge transfer from strontium and magnesium to gallium. YbMgGa completes the series of REMgGa gallides. Temperature dependent magnetic susceptibility studies reveal weak Pauli paramagnetism, confirming divalent ytterbium.
- Andere Ausgabe
- Link zur Erstveröffentlichung
Link: https://doi.org/10.1002/zaac.202200361 - Freie Schlagwörter (EN)
- Magnesium, gallium, intermetallics, crystal chemistry
- Klassifikation (DDC)
- 540
- Verlag
- Wiley, Hoboken
- Version / Begutachtungsstatus
- publizierte Version / Verlagsversion
- URN Qucosa
- urn:nbn:de:bsz:15-qucosa2-987881
- Veröffentlichungsdatum Qucosa
- 01.09.2025
- Dokumenttyp
- Artikel
- Sprache des Dokumentes
- Englisch
- Lizenz / Rechtehinweis
