
TY  - JOUR
A1  - Bursill, LA 
A1  - Peng, JL 
A1  - Fan, XD 
T1  - Rhombohedral Twin Structure in Hematite (&#945;-Fe<sub>2</sub>O<sub>3</sub>)
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1992
VL  - 45
IS  - 9
SP  - 1527
EP  - 1546
KW  - 
UR  - https://doi.org/10.1071/CH9921527 
N2  - Electron optical imaging of the structure of haematite ( &#945;-Fe2O3) in two projections has allowed the microscopic twinning elements of rhombohedral twins to be determined. A systematic analysis of alternative structural models, using computer-simulation and image-matching considerations, as well as crystallochemical arguments, is presented. The twin has a screw operation consisting of a pure rotation of 180º about [0111], the twinning direction, combined with a parallel translation of (1/22) [0111]. The twinning plane (0112) forms a coherent interface, consisting of face-and edge-shared octahedra , with no change in the normal nearest-neighbour coordination. 
ER  -

