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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: 

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Year:  2017 PT id = 764, Type = formulation spiral

Moran's Periodic Spiral (Updated)

Jeff Moran has updated his 1999 Periodic Spiral.

Click here for a larger version.

Jeff says: I offer the attached spiral formulation as a way of expressing the relationships of the f and d blocs to group 3:

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What is the Periodic Table Showing? Periodicity

© Mark R. Leach Ph.D. 1999 –


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