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pinacoid (plural pinacoids)
- (crystallography) The face of a crystal parallel to two of the axes.
- 2009 January 16, Juan Manuel Garcia-Ruiz et al., “Morphogenesis of Self-Assembled Nanocrystalline Materials of Barium Carbonate and Silica”, in Science, volume 323, number 5912:
- The crystallographic symmetry is initially broken toward dilation symmetry by the splitting of the basal pinacoid or the pseudohexagonal bipyramidal faces of the growing crystal core.