A new paper is published on journal of Inorganic Chemistry.
“ Synthesis, Structure, and Anomalous Magnetic Ordering of the Spin-1/2 Coupled Square Tetramer System K(NbO)Cu4(PO4)4 ”
K. Kimura, D. Urushihara, T. Asaka, M. Toyoda, A. Miyake, M. Tokunaga, A. Matsuo, K. Kindo, K. Yamauchi, and T. Kimura, Inorganic Chemistry (2020).