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Mineral: Cordierite
Description: Prismatic [001], modified
Location: Rocca Tederighi, Toscana, Italy
Author: Scacchi, 1886. In: V.M. Goldschmidt, Atlas der Krystallformen, 1913-1923 ('Cordierit').
System: Orthorhombic, point group: mmm
Cell: a: 568, b: 1, c: 549, alpha: 90, beta: , gamma: 90