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Abstract
The structure of cronstedtite is formed by the the stacking together of silicate layers in a regular manner. Stacking faults, each consisting of a misplacement of a layer with respect to its neighbour, occur randomly throughout the crystal, causing streaking of spots on the x-ray diffraction pattern. Measurements of the extent of this streaking have been made using six crystals of cronstedtite, and the results interpreted in terms of Wilson's theory of diffraction by layer structures containing faults. Values of α, the probability of a layer being misplaced, have been found ranging from 0.08 to 0.30.
An alternative model of the disorder in terms of dissociated dislocations is put forward.
Published Online: 2010-07-28
Published in Print: 1965-11
