When you are on the page dedicated to the "Materials" section, you have the possibility to interact with the periodic table displayed.
By clicking on an element of the table, you will be automatically redirected to the pages of the site that contains articles based on the chosen element.
Below is the case in which the interaction with the table would be based on the search for items composed of Aluminium.
Here are the results displayed after clicking on the "Aluminium" element.
You can then visit the dedicated sections that interest you.