Example – Terskite, Na4Zr[H4Si6O18]
Named for the southeastern shore of the Kola Peninsula, known since the time of the first Russian settlement as the Tersk coast.
Crystal structure of terskite Na4Zr[H4Si6O18]
Pudovkina Z V, Chernitsova N M
Doklady Akademii Nauk SSSR 316 (1991) 645-649
Thanks for showing Enargite structure, I neded it for work..