The growth dislocations of two natural spinel crystals from Pegu (Burma) have been studied by X-ray diffraction topography. The dislocation systems reported in literature - 1 1 0 {1 1 0}, 1 (1) over bar 0 {1 1 1} and 0 1 1 {1 0 0} - have not been found in any of the two samples. Growth dislocations of strong edge character - 1/2 1 2 1 {1 (3) over bar 5}-not reported till now have been characterised. (C) 2000 Elsevier Science S.A. All rights reserved. References: 17
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