Часть кристалла самарскита-Yb

Обломок массивного агрегата (метамиктного кристалла, всего 95.37%)                 
Nb2O5 - 29.53%,       Ta2O5 - 15.13%,                                          
TiO2 - 0.64%,           ThO2 - 10.11%,                                      
UO2 - 10.39%,          La2O3 - 0.03%,                                          
Ce2O3 - 0.22%,         Pr2O3 - 0.05%,                                           
Nd2O3 - 0.64%,         Sm2O3 - 0.42%,                                   
Gd2O3 - 0.55%,         Tb2O3 - 0.25%,                                       
Dy2O3 - 3.16%,         Ho2O3 - 0.59%,                                     
Er2O3 - 3.40%,          Tm2O3 - 0.58%,                                       
Yb2O3 - 5.78%,        Lu2O3 - 0.97%,                                       
Y2O3 - 1.92%,          MnO - 1.02%,                                    
ZrO2 - 0.98%,            CaO - 2.11%,                                           
Sc2O3 - 0.26%,          SnO2 - 0.54%,                                              
PbO - 0.27%,            WO3 - 2.96%,                                         
FeO - 2.55%,             SiO2 - 0.41%