See also:

• Science: Chemistry: Elements: Halogens  (3)

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] (March, 1960).