The title compound, bis[bis(triphenylphosphorandiyl)-ammonium] nonadec
aoxamolybdenum (VI), (C36H30NP2)(2)[Mo6O19], crystallizes in the tricl
inic space group P1. The hexamolybdate anion displays the typical over
all octahedral geometry for the isopolyanion, with the central O atom,
O11, residing on an inversion center.