https://apo.ansto.gov.au/items/aeb3b687-b187-76a5-e053-150a9d89ded9/full
Negative thermal expansion in the metal-organic framework material...
The metal–organic framework [Cu3(btc)2] displays negative thermal expansion (NTE) over a broad temperature range. This property arises from two coincident...
negative thermal expansionmetal organic frameworkmaterial