Fig. 4: Crystal plane clustering and orientation analysis of reconstructed single giant magnetofossil particles.
From: Three-dimensional structure, crystallography, and magnetism of giant magnetofossils
Stereographic projection of all normal vectors of surface meshes for reconstructed giant magnetofossil crystals, colored in yellow of (A–C) giant bullet (GB), (D, E) needle (N), (F) cone spearhead (CSH), (G) no-stalk spearhead (NSSH), and (H, I) whole spearhead (WSH) particles. K-means clustering centers of normal vectors, and theoretical crystal plane groups determined by the known long-axis direction, including {111}, {100}, {110}, and {311}, are also marked correspondingly. Red and blue contours represent normal vector distributions on the upper and lower hemispheres, respectively, with corresponding particle meshes on the right. Black solid and hollow diamonds represent clustering centers. Colored solid and hollow circles represent theoretical crystal planes. Colored arrows represent normal vectors of theoretical crystal planes. More clustering and orientation analyses are provided in Supplementary Fig. S5.
