R2Zn

R2Zn denotes a family of intermetallic compounds with the general formula R2Zn, where R is a rare-earth element. They are part of the broader group of rare-earth zinc intermetallics and are typically synthesized by high-temperature methods such as arc melting or induction melting, often followed by annealing to achieve phase purity.

The composition and crystal structure of R2Zn compounds depend on the specific rare-earth element. Different R can stabilize different crystal structures and lattice parameters, and R2Zn phases may coexist with other zinc-rich phases in the R–Zn phase diagram. Reported structures include hexagonal and cubic variants, with coordination environments that reflect the size and valence tendencies of the rare-earth ion.

Magnetic and electronic properties are largely governed by the 4f electrons of the rare-earth components. Depending on R, R2Zn compounds can exhibit paramagnetic, ferromagnetic, or antiferromagnetic ordering, often with notable magnetic anisotropy. Some members display low-temperature phenomena associated with correlated electron behavior, though detailed behavior is highly element-specific.

In research, R2Zn compounds are studied to understand structure–property relationships in rare-earth intermetallics and to map out trends across the rare-earth series. They are related to other R–Zn systems such as RZn3 and R2Zn17, contributing to general knowledge of phase stability and magnetic behavior in intermetallics.