Now, Hyunsoo Kim and colleagues have demonstrated superconductivity below 5.4 K in a lab-grown sample of Rh₁₇S₁₅ (pictured), which is also found in nature as the mineral miassite (H. Kim et al. Commun. Mater. 5,17; 2024). Interestingly, the superconducting properties of this compound are quite different from those seen in most of the known superconductors.

In a conventional superconductor, an isotropic energy gap opens around the Fermi energy as soon as the system transitions to the superconducting state. However, Kim and colleagues found that in the case of miassite, the superconducting gap closes along certain symmetry directions referred to as nodes.

_{现在，Hyunsoo Kim 及其同事在实验室培养的 Rh 17} S ₁₅样品中展示了低于 5.4 K 的超导性（如图），该样品在自然界中也以矿物镁铁矿的形式存在（H. Kim 等人Commun. Mater. 5， 17；2024）。有趣的是，这种化合物的超导特性与大多数已知超导体的超导特性有很大不同。

在传统的超导体中，一旦系统转变为超导状态，各向同性的能隙就会在费米能量周围打开。然而，Kim 和同事发现，在铁铝矿的情况下，超导能隙沿着某些称为节点的对称方向闭合。