Abstract
The crystal structure of chloromenite, Cu9O2(SeO3)4Cl6, a = 14.170(3) Å, b = 6.262(1) Å, c = 12.999(3) Å, β = 113.05(1)°, V = 1061.3(4) Å3, Z = 2, space group I2/m, has been solved by direct methods and refined to an R(F) index of 0.051 (wR(F 2) = 0.128). The structure is based on unbranched zweier single chains {uB, 11 } [O2Cu6] of corner sharing [OCu4] tetrahedra running parallel to the b axis. The geometry of structurally similar [uB, l1 }[O2M6] (M = Cu, Zn) chains of oxocentered [OM4] tetrahedra (M = Cu, Zn) in inorganic compounds is discussed.

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