Thorium tetrabromide

The scintillation pulse heights in thorium tetrabromide crystals showed them to be the heaviest ionic scintillators available and thereby an important contribution to advancement in detection studies. ... 

TaCI2[g] TANTALUM DICHLORIDE (GAS) 1595 ThBr4 THORIUM TETRABROMIDE 1642... 

TaCI2.5 TANTALUM 2.5-CHLORIDE 1596 ThBr4[g] THORIUM TETRABROMIDE (GAS) 1643... 

Chauvenet [1911CHA] measured the enthalpy of solution of the hepta-, deca- and do-decahydrate of thorium tetrabromide in ca. 16000H2O, as -94.35, -41.17 and - 9.62 kJ-mof. As discussed in Appendix A, comparison of these values with the enthalpy of solution of the anhydrous salt reported by the same author, -293.67 kJ-mof , leads to ... 

The actinide tetrachloride-DMA complexes cover quite a range of stoichiometry (22,24,27) and the behavior of protactinium tetrachloride is intermediate between that observed for thorium and uranium tetrachloride (Table XI). PaCl4 2.5 DMA is isostructural with the y-modifica-tion of the other 1 2.5 complexes and with PaBr4 2.5 DMA (24). However, the uranium tetrabromide complex, UBi 4 2.5 DMA, possesses a different structure. The 1 5 tetrabromide-DMA complexes (Th to U inclusive) are isostructural (24). 

Tetrachloride and tetrabromide complexes are known for thorium, protactinium, uranium, neptunium, and plutonium. These are similarly produced by halide-based oxidation of metals or hydrides, or by halogenation of oxides. A common structural type is reported for most compounds. The reported structure of thorium tetrachloride reveals that the coordination geometry about the metal is dodecahedral.The compounds are generally volatile and can be sublimed. The gas-phase electron diffraction structure of suggests that the molecule is... 

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