Ge₅ Clusters in the Trivalent Rare-Earth Compound Sm₃Ge₅.

ABSTRACT: The compound Sm₃Ge₅ adopts two modifications with Pearson symbols hP16 (AlB₂-derivative) and oF64 (defect α-ThSi2-type) upon synthesis at ambient pressure. Synthesis at extreme conditions grants access to the modification oS32 (Pu₃Pd₅-type). High-pressure high-temperature treatment of prereacted element mixtures yields Pu₃Pd₅-type Sm₃Ge₅, space group Cmcm with lattice parameters a = 9.42813(9), b = 7.56296(7), and c = 9.67056(8) Å. The atomic arrangement refined from powder X-ray diffraction data is confirmed by transmission electron microscopy measurements. The crystal structure features Ge₅ square pyramidal units. The topology of t

SUBMITTER: Hubner JM 

PROVIDER: S-EPMC12486209 | biostudies-literature | 2025 Sep

REPOSITORIES: biostudies-literature