Antiferromagnetism in semiconducting KFe0.85Ag1.15Te2 single crystals
  We have synthesized single crystals of K1.00(3)Fe0.85(2)Ag1.15(2)Te2.0(1). The materials crystallizes in the ThCr2Si2 structure with I4/mmm symmetry and without K and Fe/Ag deficiencies, unlike in KxFe2-ySe2 and KxFe2-yS2. In contrast to theoretical prediction for higher Tc in KFe2Te2, KFe0.85Ag1.15Te2 is a semiconductor with long-range antiferromagnetic transition at TN = 35 K. 
Hechang Lei, Emil S. Bozin, Kefeng Wang, and C. Petrovic
cond-mat.supr-con cond-mat.mtrl-sci