A strange pattern has been discovered underlying the structures of most materials at the molecular level.
A bizarre 'Rule of Four' has been identified in the basic structure of the majority of inorganic materials—and scientists are stumped as to why.The pattern is found in the so-called 'unit cell' of the materials—the smallest possible repeating part of each molecular structure.Researchers at the Swiss Federal Institute of Technology in Lausanne analyzed two massive databases that record the structural patterns of more than 80,000 known and predicted materials.
'We could expect to find that all the materials following this Rule of Four included silicon,' Gazzarrini said. 'But again, they did not.'Additionally, considering the amount of energy required to form bonds between atoms couldn't explain the 'Rule of Four' either.'The materials that are most abundant in nature should be the most energetically favored, which means the most stable ones, those with negative formation energy,' Gazzarrini said.
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