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
10. [nickel and nickel alloy]

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:

Pure metallic element having symbol Ni and atomic number 28; a silvery white metal with a yellowish cast, resistant to corrosion and to most acids except nitric. Use also for this metal as processed and formed, usually in combination with other substances, to make various objects and materials.