- tetragonal-trapezohedral group
-
тетрагонально-трапецоэдрическая группа
English-Russian dictionary of geology. 2011.
English-Russian dictionary of geology. 2011.
Cyrilovite — General Category Phosphate mineral Chemical formula NaFe3+3(PO4)2(OH)4•2(H2O) Strunz classification 08.DL.10 … Wikipedia
Trapezohedron — Set of trapezohedra Faces 2n kites Edges 4n Vertices 2n+2 Face configuration V3.3.3.n … Wikipedia