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Eu 3 Pt 4 Zn 12  and Sr 3 Pt 4 Zn 12  form a complete solid solution Eu 3− x   Sr   x   Pt 4 Zn 12 . Samples with  x  = 0, 0.5, 1, 1.5, 2, 2.5 and 3 were synthesized from the elements in sealed tantalum ampoules in an induction furnace. All samples were characterized by powder X-ray diffraction and the structures of Sr 3 Pt 3.93 Zn 12.07 , Eu 1.80 Sr 1.20 Pt 4 Zn 12  and Eu 3 Pt 3.68 Zn 12.32  were refined from single crystal X-ray diffractometer data. The new compounds are isotypic with Gd 3 Ru 4 Al 12 , space group  P 6 3 / mmc . The striking building units in these phases are the kagome networks occupied by the europium and strontium atoms and Pt1@Zn 8  and Pt2@Zn 8  distorted cubes. Besides the Eu/Sr mixing within the solid solution, the structure refinements indicated small homogeneity ranges induced by Pt/Zn mixing. The europium containing samples of the solid solution Eu 3− x   Sr   x   Pt 4 Zn 12  are Curie–Weiss paramagnets and the experimental magnetic moments manifest stable divalent europium. The samples with  x  = 0, 0.5 and 2 order magnetically:  T   N  = 15.4(1) K for  x  = 0,  T   C  = 12.4(1) K for  x  = 0.5 and  T   N  = 4.0(1) K for  x  = 2. The 3 K magnetization isotherms tend toward Brillouin type behavior with increasing europium dilution. The divalent ground state of Eu 3 Pt 4 Zn 12  is further confirmed by  151 Eu Mössbauer spectroscopy with an isomer shift of −9.66(2) mm s −1  at 78 K. In the magnetically ordered state Eu 3 Pt 4 Zn 12  shows full magnetic hyperfine field splitting (23.0(1) T).

A europium kagome lattice in the solid solution Eu 3− х Sr х Pt 4 Zn 12 – first zinc representatives of the Gd 3 Ru 4 Al 12 type