New Reduced Ternary Molybdenum Oxide with Infinite Mo-Mo Bonded Chains

摘要

A novel reduced ternary oxide of molybdenum is reported. The phase contains infinite octahedral chains of bonded molybdenum atoms with an average oxidation state of 2.375. The pure material can be obtained using stoichiometric quantities of manganese molybdate, molybdenum trioxide, and molybdenum powder. The structure of the crystal was solved and consists of molybdenum oxide chains extending parallel to the c-axis with interconnection by various geometries of oxygen: including square planar, trigonal planar, and sawhorse. The molybdenum oxygen framework forms trigonal prismatic tunnels in which the ternary cations reside. Studies of the electrical and magnetic properties show that the title compound is a metallic conductor and a paramagnet with weak antiferromagnetic coupling. Ion exchange reactions on Mn/sub 1.5/Mo sub 8 O sub 11 with various molten metal chloride salts are also presented. 26 refs., 8 figs., 10 tabs. (ERA citation 12:008413)