Abstract
Mixed crystal, potassium zinc vanadium sul- phate was grown from an aqueous solution containing equimolar proportions of K2Zn(SO4)2� 6H2O (Tutton's salt) and VOSO4 by slow evaporation at room temperature. Single crystal XRD analysis reveals that it belongs to monoclinic system with P21/c space group, and cell parameters are a = 9.006, b = 12.163, c = 1.36, and V = 649.6 A u 3 . The co-existence of VO(II)- and Zn in the Tutton's salt crystalline matrix was confirmed by atomic absorption spectroscopy and energy dispersive X-ray spectroscopy. Scanning electron microscopy exhibits defect centres and crystal voids. The XRD and FT-IR analyses indicate the stress that the mixed crystal under- goes as a result of incorporation of vanadium. Thermal patterns of Tutton's salt and the mixed crystal are com- pared. DTA curve exhibited a sharp endothermic peak at 420 C for the pure K2Zn(SO)4� 6H2O and at 410 C for the mixed crystal.
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