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Mineral: Apatite
Description: Penetration twin on {111}
Location: Sharpes Township, Alexander County, North Carolina, USA
Author: Hidden and Washington, 1887, 1888; Dana, 1892. In: V.M. Goldschmidt, Atlas der Krystallformen, 1913-1923.
System: Hexagonal, point group: 6/m
Cell: a: 1, b: 1, c: 734, alpha: 90, beta: , gamma: 120