Thulium compounds temperature

Neutron diffraction measurements performed on a polycrystalline sample of TmCUjSij indicate that the compound is antiferromagnetic below the Neel temperature of 3.6 K. The magnetic structure is cosinusoidally modulated along the [110] direction with the propagation vector k = (0.147, 0.147, 0). The thulium magnetic moment of 5.1 makes an angle of 33(3)° with the c-axis (Allain et al. 1988). 

The shape of the curve shown in Figure 56 predicts a fairly high stability of neodymium and promethium dichlorides among the compounds with CN = 9 and dysprosium and thulium dichlorides among the compounds with CN = 7, that is, exactly those lanthanide dichlorides that (except PmCl2) not only were successfully synthesized but also were the subject of some physicochemical measurements that required heating to high temperatures. For instance, saturated vapor pressure of... 

---