Structure and electronic transport properties of the Misfit layer compound (LaSe)1.14(NbSe2)2, „LaNb2Se5”

The new misfit layer compound (LaSe)1.14(NbSe2)2 has been synthesized from the elements at 1050‐ and its structure has been determined by a composite approach. The structure has an alternating stacking sequence of [LaSe] and two [NbSe2] layers along the c direction. The misfit of the two different layers is occurring along the a direction: a1(LaSe)=6.0191 Å and a2(NbSe2)=3.4372 Å therefore yielding a ratio of 1.751 which is very close to 7/4. An investigation of electrical resistivity was done. The crystal shows superconducting properties at 5.3 K.