Astatine: Data tables and historic information.
Britannica Nobel Prize: Astatine: Overview and basic data.
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.
Radiochemistry of Astatine: Full text of the monograph by Evan H. Appelman (Argonne National Laboratory, Lemont, Illinois). [PDF]
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.
