The two new copper(II) salts Cu(SeO₄) and Cu(SeO₃OH)₂·6H₂O were synthesized at low-temperature hydrothermal conditions (220 °C), and room temperature, respectively. Their atomic arrangements were studied based on single-crystal X-ray investigations [P2₁/n, a = 4.823(1), b = 8.957(2), c = 6.953(1) Å, β = 94.82(1)°, Z = 4; \(P{\overline 1}\), a = 6.133(1), b = 6.303(1), c = 8.648(2) Å, α = 70.45(1), β = 84.60(1), γ = 73.44(1)°, Z = 1]. Cu(SeO₄) adopts the MnAsO₄ structure type. It exhibits structural as well as topological relations with two formerly known isochemical compounds. They crystallize in the structure type ZnSO₄ (mineral name zincosite, Pnma) respectively NiSO₄ (Cmcm). The two minerals dravertite, CuMg(SO₄)₂, and hermannjahnite, CuZn(SO₄)₂, are isotypic with CuSeO₄-P2₁/n; interestingly, also α-NaCu(PO₄) belongs to this structure type: some rotation of the XO₄ group allows a supplementary position for the Na atom. — Cu(SeO₃OH)₂·6H₂O represents a new structure type. The protonated selenate group shows an extended Se—O_h bond distance (1.695 Å) as compared to the other Se—O bonds (1.614 to 1.626 Å). One OH dipole of the three independent H₂O molecules represents a rather free hydrogen bond. For the other H atoms, the O—H···O lengths vary from 2.585 to 2.799 Å. Interestingly, the distance O_w7···O_w7 of only 2.791 Å does not represent an edge in a coordination polyhedron and it is not preliminary involved in the hydrogen bond scheme. All Cu²⁺ ions in the two title compounds are in a pronounced [4 + 2] coordination. The Cu^2+[4+2] atoms in Cu(SeO₄) are linked to chains along [100]; in Cu(SeO₃OH)₂·6H₂O they are not connected among each other.

分别在低温水热条件(220 ℃)和室温下合成了两种新的铜(II)盐Cu(SeO ₄ )和Cu(SeO ₃ OH) ₂ ·6H ₂ O。基于单晶 X 射线研究研究了它们的原子排列 [ P 2 ₁ / n, a  = 4.823(1), b  = 8.957(2), c  = 6.953(1) Å, β = 94.82(1)° ，Z = 4；\(P{\overline 1}\) , a  = 6.133(1), b  = 6.303(1), c  = 8.648(2) Å, α = 70.45(1), β = 84.60(1), γ = 73.44 (1)°，Z = 1]。 Cu(SeO ₄ )采用MnAsO ₄结构类型。它表现出与两种以前已知的等化学化合物的结构和拓扑关系。它们分别以 ZnSO ₄（矿物名称红锌矿，Pnma）和 NiSO ₄ ( Cmcm )的结构类型结晶。两种矿物钙辉石CuMg(SO ₄ ) ₂和铁锰矿CuZn(SO ₄ ) ₂与CuSeO ₄ - P 2 ₁ / n 是同型的；有趣的是，α-NaCu(PO ₄ ) 也属于这种结构类型：X O ₄基团的一些旋转允许 Na 原子的补充位置。 — Cu(SeO ₃ OH) ₂ ·6H ₂ O代表了一种新的结构类型。与其他 Se-O 键（1.614 至 1.626 Å）相比，质子化的硒酸基团显示出延长的 Se-O _h键距（1.695 Å）。三个独立的H ₂ O分子中的一个OH偶极子代表相当自由的氢键。对于其他 H 原子，OH···O 长度在 2.585 至 2.799 Å 之间变化。有趣的是，仅2.791 Å的距离O _w 7···O _w 7 并不代表配位多面体中的边缘，并且它不初步参与氢键方案。两个标题化合物中的所有 Cu ²⁺离子均处于明显的 [4 + 2] 配位。 Cu(SeO ₄ )中的Cu ^2+[4+2]原子沿[100]连接成链；在Cu(SeO ₃ OH) ₂ ·6H ₂ O中它们彼此不连接。