title: Probing the vanadyl and molybdenyl bonds in complex vanadomolybdate structures.
abstract: A solid solution was found to exist in the quaternary Li(2)O-MgO-V(2)O(5)-MoO(3) system between the two phases Mg(2.5)VMoO(8) and Li(2)Mg(2)(MoO(4))(3). Both Mg(2.5)VMoO(8) and Li(2)Mg(2)(MoO(4))(3) are isostructural with the mineral lyonsite, and substitution according to the formula square(1/4-x/6)Li(4x/3)Mg(15/4-7x/6)V(3/2-x)Mo(3/2+x)O(12) (0 < or = x < or = 1.5, where square denotes a cation vacancy) demonstrates that a complete solid solution exits coupling the addition of molybdenum and lithium with the subtraction of cation vacancies, magnesium, and vanadium and vice versa. Vibrational Raman spectroscopy indicates that molybdenum-oxo double bonds preferentially associate with the cation vacancies.
authors.affiliation: Department of Chemistry, Northwestern University, Evanston, IL 60208, USA.
authors.forename: Jared P
authors.initials: JP
authors.lastname: Smit
authors.forename: Hack-Sung
authors.initials: HS
authors.lastname: Kim
authors.forename: Jason D
authors.initials: JD
authors.lastname: Pless
authors.forename: Peter C
authors.initials: PC
authors.lastname: Stair
authors.forename: Kenneth R
authors.initials: KR
authors.lastname: Poeppelmeier