It's Elemental

The following primary sources were used in the creation of this site:

Physical Data:

• CRC Handbook of Chemistry and Physics, 77th Edition

Historical and Usage Information:

• CRC Handbook of Chemistry and Physics, 77th Edition
• Exploring Chemical Elements and their Compounds; David L. Heiserman, 1992

Mineral Formulas:

• United States Geological Survey - Mineral Resources Program
• Mindat.org - The Online Mineralogy Resource
• The Mineral Gallery
• The Mineral and Gemstone Kingdom
• Mineralogy Database

Radioisotope Half-life and Decay Modes:

• National Nuclear Data Center
• Lawrence Berkeley Laboratory (page no longer available)