Quartz: Extreme Preferred Orientation Produced by Annealing

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Science  22 Sep 1967:
Vol. 157, Issue 3795, pp. 1444-1447
DOI: 10.1126/science.157.3795.1444


Annealing of samples of flint under high pressure, after hot-working in the β-quartz stability field, produced an exceedingly strong concentration of c-axes parallel to the direction of compression. A specimen deformed under identical conditions, but not annealed, exhibited a much weaker orientation. The strength of the annealed orientation rivals that of the remarkable "cube texture" produced by annealing some face-centered cubic metals after extreme reduction by rolling.