Crystal structure of Thorotrast This paper describes a high resolution electron microscopy study on diameter distribution of Thorotrast particles. Specimens were prepared from a surgically removed Thorotrast granuloma taken from a patient. The diameter was calculated by mu. tiplying the lattice distance 3.2 A of Th02 (1,1,1) face by a lattice number of this face. The lattice number ranged from 13 to 59; the diameter ranged from 42to 187 A, and the average was 1081-32 A. The distribution showed a good agreement with a normal distribution N (108,322).
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