wyckoffs: - "c" - "c" - "c" - "c" - "c" - "c" - "c" - "c" - "d" - "d" - "d" - "d" - "d" - "d" - "d" - "d" - "d" - "d" - "d" - "d" - "b" - "b" - "b" - "b" - "e" - "e" - "e" - "e" - "e" - "e" - "e" - "e" - "e" - "e" - "e" - "e" - "e" - "e" - "e" - "e" - "e" - "e" - "e" - "e" - "e" - "e" - "e" - "e" - "c" - "c" - "c" - "c" - "c" - "c" - "c" - "c"