Painite_1 Formula: Ca.77 Na.19 Zr.94 Hf.01 V.01 Cr.03 B (Al8.82 Ti.18) O18 Name: Painite Unit cell: 8.724 8.724 8.464 90.0 90.0 120.0 , V=557.88 Space group: P63/M (176)
Armbruster T , Dobelin N , Peretti A , Gunther D , Reusser E , Grobety B , American Mineralogist , 89 (2004) p.610-613, The crystal structure of painite CaZrB[Al9O18] revisited