According to: Friedel, G. (1904). Étude sur les groupements cristallins. Extrait du Bulletin de la Société de l'Industrie minérale, Quatrième série, Tomes III et IV. Saint-Étienne, Société de l’Imprimerie Théolier J. Thomas et C.. Hurst, V., Donnay, J.D.H., Donnay, G. (1956). Min. Mag., 31, 145 Nespolo M. & Ferraris G. (2007): Overlooked problems in manifold twins: twin misfit in zero-obliquity TLQS twinning and twin index calculation. Acta Crystallographica Section A A third twin having on (320) plane for staurolite. It is very rare. http://www.mindat.org/forum.php?read,7,258408,258408#msg-258408 Wed, 19 Jun 2013 03:55:26 +0000 Phorum 5.2.15a http://www.mindat.org/forum.php?read,7,258408,258533#msg-258533 http://www.mindat.org/forum.php?read,7,258408,258533#msg-258533 Uwe Kolitsch Mistakes and Errors Thu, 19 Apr 2012 19:24:51 +0000 http://www.mindat.org/forum.php?read,7,258408,258408#msg-258408 http://www.mindat.org/forum.php?read,7,258408,258408#msg-258408 Friedel, G. (1904). Étude sur les groupements cristallins. Extrait du Bulletin de la Société de l'Industrie minérale, Quatrième série, Tomes III et IV. Saint-Étienne, Société de l’Imprimerie Théolier J. Thomas et C..
Hurst, V., Donnay, J.D.H., Donnay, G. (1956). Min. Mag., 31, 145
Nespolo M. & Ferraris G. (2007): Overlooked problems in manifold twins: twin misfit in zero-obliquity TLQS twinning and twin index calculation. Acta Crystallographica Section A
A third twin having on (320) plane for staurolite. It is very rare.]]> Ferdinando Giovine Mistakes and Errors Wed, 18 Apr 2012 12:18:07 +0000