Group of betafite crystals showing defined octahedral faces (triangular), with axial growth. Very interesting for its crystallography and species. An oldie, classic and representative for the species. Although the term betafite was discredited in 2010, many of us still are using this term to define this mineral when we see it. Our specimen is an uranium, calcium, titanium and niobium/tantalum oxide with radioactive activity. Currently the betafite is included as a variety within the pyrochlore supergroup. As a note, the rich uranium term has been only found in the Moon (oxyuranobetafite).