| abstract |
The present invention relates to general formula Fe 3 (PO 4 ) 2 non-crystallization water iron (II) orthophosphate or general formula Fe a Met b (PO c ) d non-crystallization water iron (II) metal, iron phosphonate ( II) Use of metals, iron(II) pyrophosphate metals or iron(II) metaphosphate metals as absorbers for electromagnetic radiation finely distributed or dissolved in a carrier material; where a is a number from 1 to 5 , b is a number from >0 to 5, c is a number from 2.5 to 5, d is a number from 0.5 to 3 and Met represents a group selected from Li, Na, K, Rb, Cs, Mg, Ca, Sr, Ba , transition metals (d-block), especially Sc, Y, La, Ti, Zr, Hf, Nb, Ta, Cr, Mo, W, Mn, Cu, Zn, Co, Ni, Ag, Au, the third, the third Metals and semimetals of the fourth and fifth main groups, especially one or more metals of B, Al, Ga, In, Si, Sn, Sb, Bi and lanthanides, or combinations of the above-mentioned phosphates. |