| 252 / | HD | COMPOSITIONS |
| 625 | DF | RADIOACTIVE COMPOSITIONS {4} |
| 636 | ![]() | .~ Nuclear reactor fuel {4} |
| 637 | DF | .~.~> Actinide having nonactinide component {3} |
| 641 | DF | .~.~> Actinide nitrides only |
| 642 | DF | .~.~> Actinide carbides only |
| 643 | DF | .~.~> Actinide oxides only |