Low-temperature structural transition in the quasi-one-dimensional spin- 1 2 compound L i<sub>2</sub> C u<sub>2</sub> O( SO <sub>4</sub> )<sub>2</sub>
Gwenaelle Rousse J. Rodríguez-Carvajal C. Giacobbe M. Sun O. Vaccarelli G. Radtke Physical Review B: Condensed Matter and Materials Physics (1998-2015)