“…This includes charge density waves in Sm 2 Ru 3 Ge 5 and Nd 2 Ru 3 Ge 5 [1,2], superconductivity in Y 2 Ir 3 Ge 5 and La 2 Ir 3 Ge 5 [3][4][5], Kondo lattice behavior in Ce 2 Rh 3 Ge 5 , Ce 2 Ir 3 Ge 5 , and Yb 2 Ir 3 Ge 5 [6][7][8], competition between ferromagnetic and antiferromagnetic ordering in Pr 2 Ni 3 Si 5 , Ho 2 Ni 3 Si 5 , and Tb 2 Co 3 Ge 5 [9][10][11][12], intermediate/mixed valance states in Ce 2 Co 3 Ge 5 , Ce 2 Re 3 Si 5 , and Eu 2 Pt 3 Si 5 [13][14][15][16], and pressure induced quantum critical behavior in Ce 2 Ni 3 Ge 5 [17,18]. The Pr 2 M 3 Ge 5 (M = Co [19], Ni [20], Ru [19], Rh [19], Pd, Ir [3,19], Pt) compounds show many exotic phenomena such as charge density waves and polymorphism in Pr 2 Ru 3 Ge 5 [1], heavy electron behavior in Pr 2 Rh 3 Ge 5 [21], and magnetoresistance of nearly ten-fold increase in Pr 2 Pd 3 Ge 5 [21], A superconducting transition has been observed in Pr 2 Pt 3 Ge 5 at T SC = 6.7 K, coexisting with two antiferromagnetic transitions below T = 5 K [5,22,23] and non-Fermi liquid behavior, suggesting a field dependent quantum critical point [24].…”