Materials Data on LaS2 by Materials Project

LaS2 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. La3+ is bonded in a 9-coordinate geometry to nine S+1.50- atoms. There are a spread of La–S bond distances ranging from 2.90–3.25 Å. There are two inequivalent S+1.50- sites. In the first S+1.50- site, S+1.50- is bonded to five equivalent La3+ atoms to form a mixture of distorted edge and corner-sharing SLa5 trigonal bipyramids. In the second S+1.50- site, S+1.50- is bonded in a 5-coordinate geometry to four equivalent La3+ and one S+1.50- atom. The S–S bond length is 2.14 Å.

二硫化镧（LaS₂）结晶于单斜晶系P2₁/c空间群。其结构为三维结构。La³⁺以九配位几何结构与九个S¹·⁵⁻原子键合。La–S键长分布范围为2.90至3.25埃（Å）。存在两种不等价的S¹·⁵⁻位点。在第一个S¹·⁵⁻位点中，S¹·⁵⁻与五个等价的La³⁺原子键合，形成扭曲的边共享和角共享SLa₅三角双锥的混合物。在第二个S¹·⁵⁻位点中，S¹·⁵⁻以五配位几何结构与四个等价的La³⁺原子及一个S¹·⁵⁻原子键合。S–S键长为2.14埃。