Thermal expansion properties of stannosilicate molecular sieve with MFI type structure

► Thermal expansion properties of Si-MFI and SnSi-MF were investigated. ► Framework substitution of Si4+ by Sn4+ led to an increase of the αv values. ► The trend observed in the U.C. parameter in the range of 373-973 K was a > c > b. ► SnSi-MFI resulted in enhancing the strength of the NTE coefficient.