contains trigonal-pyramidal ψ-tetrahedra [AsO3]3−. The four crystallographically different As-atoms are arranged in monomeric units and trimeric chain fragments [As3O7]5−. The surroundings of the four cobalt(II) atoms are remarkably unequal and show tetrahedral, trigonal-bipyramidal and distorted octahedral coordinations. The octahedra form double-chains linked to layers by the trigonal bipyramids and dimers
Co2As2O5 是 CoAs2 单晶生长的副产物。三斜晶体结构 (, a = 6.223(1), b = 9.169(2), c = 9.259(2) A, α = 66.95(3), β = 82.18(3), γ = 79.28(3)°, Z = 4, R1(F) = 0.057, wR2(F2) = 0.141) 代表一种新的结构类型。作为典型的 AsIII,它包含三角锥 ψ-四面体 [AsO3]3-。四个晶体学上不同的 As 原子排列在单体单元和三聚体链片段 [As3O7]5- 中。四个
钴 (II) 原子的周围环境明显不均匀,并显示出四面体、三角-双锥体和扭曲的八面体配位。八面体形成双链,通过四面体的三角双锥和二聚体连接到层。