Large negative thermal expansion in non-perovskite lead-free ferroelectric Sn2P2S6 Rong, Yangchun ; Li, Menglei ; Chen, Jun ; Zhou, Mei ; Lin, Kun ; Hu, Lei ; Yuan, Wenxia ; Duan, Wenhui ; Deng, Jinxia ; Xing, Xianran Abstract Publication: Physical Chemistry Chemical Physics (Incorporating Faraday Transactions) Pub Date: 2016 DOI: 10.1039/C6CP00011H Bibcode: 2016PCCP...18.6247R