Abstract
A series of metalloborophosphates Na 2[ M IIB 3P 2O 11(OH)]·0.67H 2O ( M II=Mg, Mn, Fe, Co, Ni, Cu, Zn) have been prepared hydrothermally and their structures have been solved by single-crystal diffraction techniques. They all crystallize in a hexagonal space group P6 3 and form a 3D microporous structure with 12-membered ring channels consisted of octahedral ( M IIO 6), tetrahedral (BO 4, PO 4) and triangular (BO 2(OH)) units, in which the counter Na + cations and water molecules are located. The Na + cations are mobile and can be exchanged by Li + in a melt of LiNO 3. Their open frameworks are thermal stable up to about 500 °C. Completed solid solutions between two different transition metals can also be obtained. Magnetic properties of Na 2[ M IIB 3P 2O 11(OH)]·0.67H 2O ( M II=Mn, Co, Ni, Cu) have been investigated.
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