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The orientation of Widmanstetter figures in a random section
Published online by Cambridge University Press: 14 March 2018
Extract
The problem of determining the orientation of Widmanstetter figures has recently arisen in a paper by Dr. L. J. Spencer on the Gibeon shower of meteoritic irons in South-West Africa: the method of attacking it to be described here will be applied to the crystals illustrated in plate II of his paper.
By producing the faces of a regular octahedron in all possible directions a set of six congruent prisms is formed, as shown in fig. 1. The Widmanstetter figures are the traces of these prisms in a plane of section. The section across any one of the prisms by a plane normal to its axis is a rhomb whose angles are those of a face of the rhombic-dodecahedron, that is to say, 70° 31′ and 109° 28′.
- Type
- Research Article
- Information
- Mineralogical magazine and journal of the Mineralogical Society , Volume 26 , Issue 176 , March 1942 , pp. 167 - 171
- Copyright
- Copyright © The Mineralogical Society of Great Britain and Ireland 1942
References
Note
page 167 note 1 Spencer, L. J., Min. Mag., 1941, vol. 26, p. 19, pls. I, II.CrossRefGoogle Scholar