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Mineral: Topaz
Description: {100}, {021}, {110}, modified
Location: Miask, Ilmen mountains, Ural, Russia
Author: Kokscharow, 1854. In: V.M. Goldschmidt, Atlas der Krystallformen, 1913-1923.
System: Orthorhombic, point group: mmm
Cell: a: 529, b: 1, c: 955, alpha: 90, beta: , gamma: 90