Materials with the crystal structure of γ-brass type (Cu₅Zn₈ type) are typical representatives of intermetallic compounds. From the electronic point of view, they are often interpreted using the valence electron concentration approach of Hume–Rothery, developed previously for transition metals. The γ-brass-type phases of the main-group elements are rather rare. The intermetallic compound Be₂₁Pt₅, a new member of this family, was synthesized, and its crystal structure, chemical bonding, and physical properties were characterized.

中文翻译：

---

超导复合金属间化合物Be ₂₁ Pt ₅中的团簇形成

具有γ-黄铜型（Cu ₅ Zn ₈型）晶体结构的材料是金属间化合物的典型代表。从电子的角度来看，它们通常使用休ume-拉特里（Hume-Rothery）的价电子浓度法（以前为过渡金属开发）来解释。主族元素的γ-黄铜型相非常罕见。合成了该族的新成员金属间化合物Be ₂₁ Pt ₅，并对其晶体结构，化学键和物理性质进行了表征。