Description: Mineral: Albite Description: Pericline law twin with rhombic section Location: Ritenbenk, Greenland Author: Böggild, 1805. In: V.M. Goldschmidt, Atlas der Krystallformen, 1913-1923 ('Feldspat-Gruppe. Albit'). System: Triclinic, point group: 1 Cell: a: 0.636, b: 1, c: 0.559, alpha: 94.33, beta: 116.56, gamma: 87.65 Image © Smorf

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