Syntheses and crystal structures of Co3(C2O4)(SeO3)2 and Zn(C2O4) · 2H2O
Abstract
Co3(C2O4)(SeO3)2 and Zn(C2O4) · 2H2O were synthesized investigating the reaction products of Fe(C2O4) · 2H2O and SeO2 combined with transition metal elements at low-hydrothermal conditions. The crystal structures were determined by direct methods from single-crystal X-ray diffraction data. Co3(C2O4) (SeO3)2: space group C2/m, Z = 2, a = 9.163(2) Å, b = 6.513(2) Å, c = 7.806(2) Å, β = 117.14(2)°, V = 414.6(2) Å3, R1 = 0.023. Zn(C2O4) · 2H2O: space group C2/c, Z = 4, a = 11.812(3) Å, b = 5.402(1) Å, c = 9.919(2) Å, β = 127.72(1)°, V = 500.6(1) Å3; R1 = 0.029. Both compounds consist of MO6 octahedra (M = Co, Zn), linked via the oxalate groups to chainlike subunits. These are further combined via additional CoO6 octahedra and the trigonal pyramidal selenite group or via hydrogen bonds, respectively. Mean bond lengths are 2.119 Å and 2.099 Å for Co[6]–O, 1.701 Å for Se(IV)[3]–O and 2.094 Å for Zn[6]–O.
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- A Monte Carlo method for indexing
- Kinetic and microstructural studies of the crystallisation of coesite from quartz at high pressure
- Studies on peroxomolybdates XXI. Crystal structure of the ammonium peroxooctamolybdate(VI) (NH4)4[Mo8O24+x(O2)2−x(H2O)2] · 4H2O (x = 0.8)1
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- A neutron powder investigation of the high-temperature structure and phase transition in stoichiometric LiNbO3
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- Lithium hydrogenselenite, LiHSeO3: Structure refinement using multiple-wavelength synchrotron radiation data
- Crystal structures of four Cs3MI5 (M = Mn, Cd, Hg) phases and structural relationship among Cs3MI5 compounds
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