Abstract
Abstract Electronic spectra of nickel and cobalt doped ZnNH4PO4 .6H2O (Zinc struvite) crystals are recorded both at room and liquid nitrogen temperatures. In nickel doped host, bands are assigned to Ni(II) in octahedral symmetry whereas in cobalt doped host they are assigned to Co(II) in octahedral symmetry associated with spin orbit interaction. From the results and analysis, the following crystal field (Dq), interelectronic repulsion (B, C) and spin orbit interaction (ξ) parameters are evaluated. B = 930, Dq = 950 and C = 3550 cm−1 for Nickel ion and B = 870, Dq = 980 and C = 3830 cm−1, ξ = 500 cm−1 for cobalt ion.
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