ChemInform Abstract: Lithium‐Filled Double‐Deck Layered Structure of the RELixCu2‐yP2 (RE: La, Pr, Nd, Gd, Er; 0.82 ≤ x ≤ 1; 1.19 ≤ y ≤ 1.54) Series: Experimental and Theoretical Studies. Issue 35 (September 2015)