Periodic Table · element

Terbium

Tb · Z 65

atomic number

65

atomic mass

158.93

notation

Tb

group

f-block: Lanthanide

period

6

state0c

Solid

state20c

Solid

density

8.23

melting pt

1360

boiling pt

3230

discovered

1843

abundance

1.2

ore grade

50

ore minerals

ion-adsorption clays, xenotime

mined as

By-product

extraction

The scarcest of the commercially important rare earths; from the same southern-Chinese clays as dysprosium.

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From the All Periodical Elements database in Notion, last edited 2026-08-16. This page is the row, rendered by the build; nothing on it is written by hand.