In response to the requests of our scientific community, Scienze del Territorio is glad to make articles available online soon after acceptance.
After peer-review and revision, the Just Accepted Manuscripts will be posted online prior to technical editing, formatting for publication, and author proofing.
This is a service we offer to the research community in order to to expedite the dissemination of scientific information as soon as possible after acceptance.
Just Accepted Manuscripts will be given a header, an article ID, a Digital Object Identifier (DOI), and will show an “Accepted Manuscript” watermark across each page.
Finally the Just Accepted Manuscripts will be removed from the website, the article will be assigned to a forthcoming issue and published both online and in hard copy. The DOI will always remain the same, to make sure that all citations will correctly link to the final paper.
Notice: what follows is just a template for future publications, not to be read as part of the journal contents.
Particular Symmetries: Group Theory of the Periodic System
Pieter Thyssen*, Institute of Philosophy, KU Leuven, Kardinaal Mercierplein 2, B-3000 Leuven, Belgium
Arnout Ceulemans, Department of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001 Heverlee, Belgium
Accepted: 2019-12-19 | Published Online: 2019-12-21 | DOI : 10.13128/Substantia-671
To this day, a hundred and fifty years after Mendeleev's discovery, the overal structure of the periodic system remains unaccounted for in quantum-mechanical terms. Given this dire situation, a handful of scientists in the 1970s embarked on a quest for the symmetries that lie hidden in the periodic table. Their goal was to explain the table's structure in group-theoretical terms. We argue that this symmetry program required an important paradigm shift in the understanding of the nature of chemical elements. The idea, in essence, consisted of treating the chemical elements, not as particles, but as states of a superparticle. We show that the inspiration for this came from elementary particle physics, and in particular from Heisenberg's suggestion to treat the proton and neutron as different states of the nucleon.
We provide a careful study of Heisenberg's last paper on the nature of elementary particles, and explain why the Democritean picture of matter no longer applied in modern physics and a Platonic symmetry-based picture was called for instead. We show how Heisenberg's Platonic philosophy came to dominate the field of elementary particle physics, and how it found its culmination point in Gell-Mann's classification of the hadrons in the eightfold way. We argue that it was the success of Heisenberg's approach in elementary particle physics that sparked the group-theoretical approach to the periodic table. We explain how it was applied to the set of chemical elements via a critical examination of the work of the Russian mathematician Abram Ilyich Fet the Turkish-American physicist Asim Orhan Barut, before giving some final reflections.