Aspedamite


Aspedamite is a very rare mineral, one of two natural heteropolyniobates. Its chemical formula is complex and shows the presence of essential vacancies: 12Nb493. Its structure is the same as of the second known heteropolyniobate - menezesite. Aspedamite is somewhat similar to another mineral from Norway, peterandresenite, which is a hexaniobate.