Cappelenite-(Y)
BaY6B6Si3O24F2 [CNMNC approved formula]
Named for D. Cappelen of Holden, Norway, a collector who discovered the mineral, and its "yttrium" content.
| IMA status : | Approved Species 1885 () |
| CLASSIFICATION | |
| Dana (8th edition) : |
54.02.03.01 |
| (54) Nesosilicate Borosilicates and Some Beryllosilicates | |
| (54.02) with B in [4] coordination | |
| (54.02.03) Cappellanite - Stillwellite group | |
| Nickel-Strunz (10th edition) : |
09.AJ.30 |
| (09) Silicates | |
| (09.A) Nesosilicates (Isolated tetrahedron) structures | |
| (09.AJ) Nesosilicates with BO3 triangles and/or B[4], Be[4] tetrahedra, cornersharing with SiO4 | |
| Crystal system: | Trigonal System |
| Point group (H-M): | 3 — pyramidal |