- ChemGlobe: Astatine
- Electronic, thermal, and steric data, along with a table of isotopes.
- Chemical Elements.com: Astatine
- Basic information, atomic structure, and table of isotopes.
- EnvironmentalChemistry.com: Astatine
- Atomic structure, chemical and physical properties, and table of nuclides.
- It's Elemental: Astatine
- Basic physical and historical information.
- LANL: Astatine
- History, uses, production, and properties.
- Lenntech: Astatine
- Physical data, chemical properties, and health effects.
- Visual Elements: Astatine
- General and physical information, source, key isotopes, and ionisation energies.
- WebElements: Astatine
- Extensive information on history and properties.
- Wikipedia: Astatine
- Properties of the element, including its history, applications, and characteristics.
- Radiochemistry of Astatine
- Full text of the monograph by Evan H. Appelman (Argonne National Laboratory, Lemont, Illinois). [PDF]
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