“…Li 1 + x R x Ti 2 − x (PO 4 ) samples (denoted hereafter LRTP), with R = Al, Sc, In, were prepared by heating stoichiometric mixtures of Li 2 CO 3 , (NH 4 ) 2 HPO 4 , R 2 O 3 and TiO 2 at increasing temperatures in the 573-1373 K interval, following the procedure described previously [14,16,17]. The composition of prepared samples covers x values between 0 and 0.3 in binary series and x values between 0 and 0.6 in ternary samples (Al = 0.3/structural formula), see Table 1.…”