Fig. 1. Crystal structure of Ag₇₇Cu₂₂(CHT)₄₈.

a Top view along the C₃-axis of Ag₇₇Cu₂₂(CHT)₄₈. Top and side views of each shell: b Ag₁₂ shell, c Ag₈Cu₂₂ shell, d Ag₅₆S₄₈ shell. e The radial distances from the center Ag atom (orange) to the Ag atoms (cyan) on the outer shell. f The interface bonding motifs for AgCHT and g, h the ripple-like pattern of S atoms in Ag₁₉S₁₈ units. The colors of the S atoms change from yellow to red with ripple diffusion. The distorted arrows indicate the rotation of the helical stripes. Color codes: orange, green, cyan, pale pink, purple, Ag; pale pink, Cu; gray, C; light gray, H; others, S.