Liandratite 
U+6Nb2O8 [CNMNC approved formula]
Named for Georges Liandrat and his wife, of Samoens, France, who had prospected extensively in Madagascar.
| IMA status : | Approved Species 1978 () |
| CLASSIFICATION | |
| Dana (8th edition) : |
08.01.09.01 |
| (08) Multiple Oxides with Nb, Ta, and Ti | |
| (08.01) where A BO4 | |
| (08.01.09) | |
| Nickel-Strunz (10th edition) : |
04.DH.35 |
| (04) Oxides and Hydroxides | |
| (04.D) Metal:Oxygen = 1:2 and similar | |
| (04.DH) With large (+- medium-sized) cations; sheets of edge-sharing octahedra | |
| Crystal system: | Trigonal System |
| Point group (H-M): | 3m (or 3 2/m) — hexagonal-scalenohedral |
| Other Properties: | Radioactive. |