Fig. 4: Mechanism of negative thermal expansion.
From: Negative thermal expansion in α-Zr2SP2O12 based on phase transition- and framework-type mechanisms
a DSC curve of α-Zr2SP2O12. b Zr–O–P (or S) bond angle as a function of temperature. Atomic distances between c O atoms and Zr atoms, d O atoms and P (or S) atoms, and e Zr atoms as functions of temperature. Crystal structure of α-Zr2SP2O12 viewed along the e a-axis and f c-axis. The P and S atoms occupy the same coordinates and cannot be distinguished.
