Muthu, K. and Bhagavannarayana, G. and Meenakashisundaram, S. P. (2012) Synthesis, growth, structure and characterization of nickel(II)-doped hexaaquacobalt(II) dipotassium tetrahydrogen tetra-o-phthalate tetrahydrate crystals. Solid State Sciences, 14 (9). pp. 1355-1360. ISSN 1293-2558

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Abstract

Single crystals of K-2[Co(1-x)Nix(H2O)(6)] (C8H5O4)(4)center dot 4H(2)O (x = 0.25) (PCNHP), a semiorganic black colored transparent crystal of size similar to 20 x 13 x 4 mm(3), are grown from an aqueous solution of potassium hydrogen phthalate enriched with cobalt chloride and nickel chloride by slow evaporation solution growth technique at room temperature. Structural analysis by single crystal X-ray diffraction reveals that the crystal belongs to monoclinic system with space group P2(1)/c and the cell parameters are a = 10.41(3) angstrom, b = 6.84(2) angstrom, c = 29.46(9) angstrom, Z = 4. Incorporation of both Co(II) and Ni(II) into the potassium hydrogen phthalate (KHP) crystal lattice is well confirmed by EDS and chemical tests. Powder XRD profiles indicate the crystallinity and FT-IR studies reveal the vibrational patterns. The UV-vis optical absorption spectrum of PCNHP shows the lower optical cut-off at similar to 300 nm and the crystal was transparent in the entire visible region. The crystalline perfection of the grown crystal analysed by high-resolution X-ray diffraction (HRXRD) analysis reveals that the diffraction curve (DC) contains multi-peaks with low angular spread indicating the possibility of low angle structural grain boundaries. Scanning electron microscope (SEM) studies indicate the structure defect centers. The dielectric, thermal and mechanical behaviors of the specimen were also investigated.

Item Type:	Article
Additional Information:	copyright for this article belongs to M/s Elsevier
Subjects:	Chemistry > Inorganic Chemistry Chemistry > Physical Chemistry Applied Physics/Condensed Matter
Divisions:	UNSPECIFIED
Depositing User:	Users 27 not found.
Date Deposited:	19 Aug 2026 10:45
Last Modified:	19 Aug 2026 10:45
URI:	https://npl.csircentral.net/id/eprint/3366

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