Pebble of Zirconolite-3T crystals intergrowth rounded in placer. Composition of the mineral is (Ca.53U.35Th.03)0.91(Zr.99Hf.02)1.01(Ti1.43Mg.44Nb.07Al.05)1.99O6.72(OH)0.28. Apparently this is intermediate specie in CaZrTi2O7 - UZrTiMgO7 series. UO2 content is 23.18 %, ThO2 1.78 %. Specimen size is 14x14x9 mm, its weight is 4.5 g and radioactivity - 430 μR/h. Specimen obtained from Sieghard Ellenberger (Crystal-Treasure). Pavel M. Kartashov collection and photo.
This photo has been shown 164 times