Lisensiering:

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Opphavleg opplastingslogg

• 2008-05-10 02:41 Tillman 1400×767× (748215 bytes) Betafite, Gunnison, Colorado. Mineral collection of Bringham Young University Department of Geology, Provo, Utah. Photograph by Andrew Silver. BYU index 4-8036, (CaFeU)_2 - x(NbTaTi)_2O_6(OHF). URL: http://libraryphoto.cr.usgs.gov/htmllib/btch555/btch5