$\mathbf{q}=0$ long-range magnetic order in centennialite CaCu${}_3$(OD)${}_6$Cl${}_2$$\cdot$0.6D${}_2$O: A spin-1/2 perfect kagome antiferromagnet with $J_1$-$J_2$-$J_d$

K. Iida, H. K. Yoshida, A. Nakao +13

Crystal and magnetic structures of the mineral centennialite CaCu${}_3$(OH)${}_6$Cl${}_2\cdot 0.6$H${}_2$O are investigated by means of synchrotron x-ray diffraction and neutron diffraction…