Physicochemical study of ammonium dicobalt(II)-octa-molybdenum with the composition (NH4)2[Co(H2O)4]2[Mo8O27]•6H2O

Ammonium dicobalt(II)-octa-molybdenum with the composition (NH4)2[Co(H2O)4]2[Mo8O27]•6H2O (I) is synthesized and studied by X-ray diffraction, IR spectroscopy, and thermogravimetry. The compound crystallizes in a triclinic system with the following unit cell parameters: a = 8.62923(9) A, b = 9.4795(10) A, c = 12.2071(13) A, α = 104.326(2)°, β = 109.910(2)°, γ = 100.820(2)°, V = = 868.18(16) A3, ρ(calc.) = 3.071 g/cm3, Z = 1. Space group is Р-1. IR spectroscopic and thermogravimetric analyses are performed.