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In Cu-bearing tourmaline, the octahedrally coordinated Z site is completely occupied by Al, the octahedrally coordinated Y site is occupied primarily by Li and Al, and the nine-coordinate X site is approximately half-occupied by Na.
Supporting information
![cif](https://journals.iucr.org//../logos/filetypeicons/bw/b1/ciflogo.png) | Crystallographic Information File (CIF) Contains datablocks br1070, T54, T55 |
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