Lone-pair containment in closed cavities. The MTe6O13 (M = Mn, Ni, Co) family of ternary oxides

Irvine, John T. S.; Johnston, Magnus G.; Harrison, William T. A.

doi:10.1039/b300573a

Cited by 20 publications

(18 citation statements)

References 16 publications

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“…Te1 is displaced from the O1/O2/O3 plane by 0.946 (3) A Ê , and Te2 is displaced from the O4/O5/O6 plane by 1.042 (3) A Ê . However, as is typical for tellurium(IV) (Feger et al, 1999;Irvine et al, 2003), there are further O atoms with TeÁ Á ÁO < 3.00 A Ê in the coordination spheres of both Te1 and Te2. The shortest TeÁ Á ÁO distance, viz.…”

Section: Commentmentioning

confidence: 73%

Li(VO₂)₃(TeO₃)₂

Johnston

Harrison

2007

Acta Crystallogr C

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Section: Commentmentioning

confidence: 73%

Li(VO₂)₃(TeO₃)₂

Johnston

Harrison

2007

Acta Crystallogr C

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“…In the literature, several ternary cobalt tellurates and lithium cobalt oxides are found which exhibit magnetic ordering. CoTe 6 O 13 has a Néel temperature of T N = 21 K 45 and Co 2 Te 3 O 8 of T N = 70 K. 46 Co 3 TeO 6 was found to exhibit a complex magnetism with transitions T 1 = 26 K, T 2 = 19.5 K, and T 3 = 18 K, 47 (Fig. 4, bottom) finally show the typical behavior of a paramagnetic material, with slightly curved isotherms at 3 and 10 K. The saturation magnetization at 3 K and 80 kOe was determined to be μ sat = 1.05(1)μ B .…”

Section: Physical Propertiesmentioning

confidence: 99%

Li₃Co_1.06(1)TeO₆: synthesis, single-crystal structure and physical properties of a new tellurate compound with Co^II/Co^IIImixed valence and orthogonally oriented Li-ion channels

et al. 2017

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A tellurate compound with Co/Co mixed valence states and lithium ions within orthogonally oriented channels was realized in LiCoTeO. The single-crystal structure determination revealed two independent and interpenetrating Li/O and (Co,Te)/O substructures with octahedral oxygen coordination of the metal atoms. In contrast to other mixed oxides, a honeycomb-like ordering of CoO and TeO octahedra was not observed. LiCoTeO crystallizes orthorhombically with the following unit cell parameters and refinement results: Fddd, a = 588.6(2), b = 856.7(2), c = 1781.5(4) pm, R = 0.0174, wR = 0.0462, 608 F values, and 33 variables. Additional electron density in tetrahedral voids in combination with neighboring face-linked and under-occupied octahedral lithium sites offers an excellent possible diffusion pathway for lithium ions. According to the symmetry of the crystal structure the diffusion pathways in LiCoTeO were found in two orthogonal orientations. The Co/Co mixed valence was investigated via X-ray photoelectron spectroscopy (XPS), revealing a composition comparable to that derived from single-crystal X-ray diffractometry. Magnetic susceptibility measurements underlined the coexistence of Co and Co, the title compound, however, showed no magnetic ordering down to low temperatures. The ionic conductivity of LiCoTeO was determined via alternating current (AC) electrochemical impedance spectroscopy and was found to be in the range of 1.6 × 10 S cm at 573 K.

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“…The connectivity of the VO 4 , VO 6 and TeO 3 polyhedra in (I) leads to a layered structure. The building blocks share vertices via V-O-V and V-O-Te bonds; conversely, there are no Te-O-Te links, which can occur in tellurium-rich compounds (Irvine et al, 2003). Each anionic layer in (I) is constructed from two infinite (100) sheets of composition…”

Section: Packing Featuresmentioning

confidence: 99%