Etude cristallochimique du molybdate et du tungstate d'américium(III): α-Am2(MoO4)3, α-Am2(WO4)3

Preparation and characterisation of Tl2Pu(MoO4)3 and Tl4Pu(MoO4)4 in Tl–Pu–Mo–O system by X-ray and thermal methods

“…Fig. 2 also shows that the thermal stability of Pu(MoO 4 ) 2 is higher than those of Tl 2 Pu(MoO 4 ) 3 4 and can also be seen from higher melting point of Pu(MoO 4 ) 2 as compared to thallium plutonium molybdates. When above compounds were heated in air, all these decomposed to give a solid product PuO 2 .…”

“…It is observed that decomposition of all these compounds obeys first order kinetics indicating nucleation and growth as the rate-controlling step. Identical nature of a versus temperature plot of MoO 3 with those of Tl 4 Pu(MoO 4 ) 4 and Pu(MoO 4 ) 2 indicates that the kinetics of decomposition of these compounds are controlled by MoO 3 volatilization.…”

“…The indexed XRD data of Tl 2 Pu(MoO 4 ) 3 and Tl 4 Pu(MoO 4 ) 4 are reported in Tables 2 and 3 4 showed the decomposition from 1223 K, 973 K and 1033 K up to 1673 K and total observed weight losses were 46.72%, 75.34% and 82.50%, respectively. Final products in all the three decompositions were confirmed as PuO 2 by weight loss calculations and XRD.…”

“…and K 3 MoO 4 -Am 2 III (MoO 4 ) 3 system by micro thermal analysis and X-ray diffraction [4]. Huyghe reported the structural study of K 2 Th(MoO 4 ) 3 and K 8 Th (MoO 4 ) 6 and indexed them on monoclinic and triclinic systems, respectively [5,6].…”

Trivalent Transuranium Element Molybdates and Tungstates: Tu2MO6 and Tu2(MO4)3 (Tu = Pu; Am ;M = Mo,W)

“…We have described several neptunium, plutonium and americium molybdates and tungstates previously [2,3,4,5]; in the present work, we have extended these studies to trivalent plutonium and americium Compounds of the type TuiMOe and Tuj (M04)3.…”