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We report the synthesis, x-ray diffraction, magnetic susceptibility andspecific heat measurements on polycrystalline samples of undoped LiNi2P3O10 andsamples with non-magnetic impurity (Zn2+, S = 0) and magnetic impurity (Cu2+, S= 1/2) at the Ni site. The magnetic susceptibility data show a broad maximum ataround 10 K and a small anomaly at about 7 K in the undoped sample.There is alambda-like anomaly in the specific heat at 7 K, possibly due to the onset ofantiferromagnetic ordering in the system. The magnetic entropy change at theordering temperature is close to the value corresponding to Rln(2S+1) expectedfor an S = 1 system. The temperature corresponding to the broad maximum and theordering temperature both decrease on Zn and Cu substitutions and also inapplied magnetic fields.

Magnetic susceptibility and heat capacity of a novel antiferromagnet: LiNi2P3O10 and the effect of doping