Crystal Structure of Terbium Potassium Octacyanotungstate(IV) Heptahydrate

Abstract

Thallium sulfide layers will be formed on the surface of low-density polyethylene (PE) if the PE layer is sulphured in a solution of higher polythionic acid H 2 S 33 O 6 , and then immersed in the alkaline solution of thallium(Ι) sulfate. Sulphur concentration increases on PE surface with the increase of the sulphurization time. The amount of thallium in the Tl x S y layers depends on a sulphur concentration sorbed-diffused into PE. Three phases TlS, Tl 2 S and Tl 2 S 2 were identified by X-ray diffraction analysis in thallium sulfide layers. Scanning Electron (SEM) and Atomic Force (AFM) microscopies were used to characterize surface morphology of thallium sulfide layers. The films deposited on the PE surface have a non-homogeneous structure and consist of separated islands. The process of their growth on PE surface starts from nucleation sites creating islands of TlS with diameter in tenths of microns which increase up to 9 μm during 1 h deposition.