“…T he unusual physical and chemical properties, such as ferroelectric, magnetic, dynamical, and structural properties 1 of boracites, M 3 B 7 O 13 X (M = divalent metals Mg, Cr, Mn, Fe, Co, Ni, Cu, Zn, Cd; X = usually Cl, Br, I), which represents a family of more than 25 isomorphous compounds, have been the focus of research for many years. 2 Usually, boracites have been prepared by four basic techniques, which include vaportransport-type methods, 3,4 sintering-flux-type methods, 5,6 sol− gel processes, 7 and hydrothermal methods. 8 In the vaportransport method, for example, HX and MX 2 acted as the gastransport agent, as indicated by the represented reactions listed below: 3 + = + MO 2HX(g) MX (g) H O(g) 2 2 Hydrothermal methods were used for many systems that discovered chalcogen, 8 hydroxyl, 8,9 and lithium boracites, 9 but they were not suitable for halogen boracites.…”