Ranby, P. W. (1950) Luminescent tungstates of magnesium, calcium, zinc and cadmium. Doctoral thesis, Northern Polytechnic.
Like so many other branches of science, the field covered by the term "Luminescence" cannot be assigned to any one definite subject. Instead, it is a branch of science embracing both chemistry and physics, and yet not wholly within the accepted boundaries of physical chemistry. In general, the preparation of luminescent materials is a complex chemical process, and the investigation of what would appear to be properties of fundamental importance involves complicated physical measurements. Luminescence is, therefore, a subject which attracts both chemists and physicists alike, and in the present thesis it is from the chemical side that has been approached.
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