The high-pressure structural, vibrational and electrical properties for realgar were investigated by in-situ Raman scattering and electrical conductivity experiments combined with first-principle calculations up to ∼30.8 GPa. It was verified that realgar underwent an isostructural phase transition at ∼6.3 GPa and a metallization at a higher pressure of ∼23.5 GPa. The isostructural phase transition was well evidenced by the obvious variations of Raman peaks, electrical conductivity, crystal parameters and the As-S bond length. The phase transition of metallization was in closely associated with the closure of bandgap rather than caused by the structural phase transition. And furthermore, the metallic realgar exhibited a relatively low compressibility with the unit cell volume V₀=718.1.4 ų and bulk modulus B₀=36.1 GPa.

通过原位拉曼散射和电导率实验并结合高达30.8 GPa的第一性原理研究了雄黄的高压结构，振动和电学性质。证实雄黄在〜6.3 GPa时发生了同构相变，在〜23.5 GPa的较高压力下发生了金属化。拉曼峰，电导率，晶体参数和As-S键长的明显变化充分证明了同构相变。金属化的相变与带隙的闭合密切相关，而不是由结构相变引起。而且，金属雄黄显示出相对低的可压缩性，其晶胞体积为V ₀ = 718.1.4ų和体积模量B ₀＝ 36.1 GPa。