Hierarchy classification:

1. top of the aat hierarchies
2. Materials Facet
3. Materials (hierarchy name)
4. materials (substances)
5. [materials by composition]
6. inorganic material
7. metal
8. [metal by composition or origin]
9. nonferrous metal

Additional parents:

1. top of the aat hierarchies
2. Materials Facet
3. Materials
4. materials
5. materials by form
6. materials by chemical form
7. elements

Anotations

Scope note:

Artificially produced, radioactive metallic chemical element with symbol Cf and 98 as atomic number. Californium has a few specialized uses as in neutron activation analysis of metals in ancient coins, and in airport security full body scanning.