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The INTERNET Database of Periodic Tables

There are thousands of periodic tables in web space, but this is the only comprehensive database of periodic tables & periodic system formulations. If you know of an interesting periodic table that is missing, please contact the database curator: Mark R. Leach Ph.D.

Use the drop menus below to search & select from the more than 1300 Period Tables in the database: 

  Text Search:       

Year:  2018 PT id = 977

Simpson's 4-Dimensional Version of the ADOMAH Periodic Table

Doug Simpson writes:

"Valery Tsimmerman's ADOMAH table and website got me started as a periodic table hobbyist. The attached photos show what I've been up to. Valery's observation that n, l, & m conspire to generate a half-filled tetrahedral lattice inspired me to create a 4D periodic table using all four quantum numbers as coordinates."

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What is the Periodic Table Showing? Periodicity

© Mark R. Leach Ph.D. 1999 –

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This free, open access web book is an ongoing project and your input is appreciated.