Tetrahedral Co(II) Coordination in a-type Cobalt Hydroxide: Rietveld Refinement and X-ray Absorption Spectroscopy
作者：Renzhi Ma, Zhaoping Liu, et al.
關鍵字：Rietveld refinement, cobalt hydroxide
論文來源：期刊
具體來源：Inorg. Chem. 2006, 45, 3964-3969.
發表時間：2006年
We report a Rietveld refinement analysis and X-ray absorption study on a green-color Cl--intercalated R-type cobalt hydroxide phase. The refinement clearly demonstrated that one-fifth to one-sixth of the Co(II) at octahedral sites was replaced by pairs of tetrahedrally coordinated Co(II) on each side of the hydroxide plane, represented by a structural formula of [Coocta0.828Cotetra0.348(OH)2]0.348+Cl0.348â0.456H2O. X-ray absorption spectroscopy also indicated that the divalent cobalt were in local neighboring environments of both octahedral and tetrahedral coordination. Furthermore, UV-vis spectroscopic measurements elucidate the typical green/blue color of an R-type cobalt hydroxide.