Ternary compounds between thorium monocarbide and thorium dihydride

The Thorium Benzyne

Thorium speciation in seawater

Since the 1960s, thorium isotopes occupy a special place in the oceanographer’s toolbox as tracers for determining rates and mechanisms of oceanic scavenging, particle dynamics, and carbon fluxes. Due to their unique and constant production rates from soluble parent nuclides of uranium and radium, their disequilibrium can be used to calculate rates and time scales of sinking particles. In addit...

Cervical thorium dioxide granuloma ('thorotrastoma').

An elderly woman had an expanding cervical mass that entrapped and compressed the adjacent cranial nerves, blood vessels, and muscles. The mass was dense on radiographs, extended from the skull base to low neck in the prevertebral and parapharyngeal tissues, and showed mixed intensity on MR. A previous direct carotid arteriogram with thorium dioxide as the contrast agent suggested the histologi...

Centrosymmetric and chiral porous thorium organic frameworks exhibiting uncommon thorium coordination environments.

The solvothermal reaction of thorium nitrate and tris-(4-carboxylphenyl)phosphine oxide in DMF affords a centrosymmetric porous thorium organic framework compound [Th(TPO)(OH)(H2O)]·8H2O (1). In contrast, the ionothermal reaction of the same reagents in the ionic liquid 1-butyl-2,3-dimethylimidazolium chloride results in the formation of a rare example of a chiral and porous thorium organic fra...

Thorium and Iron Content of Mine Dusts

The thorium content of mine dust collected at various locations along the drift to the SNO site has been measured with several techniques-direct counting, proton induced x-ray emission, x-ray fluorescence, and neutron activation analysis. The thorium content varies significantly, from a minimum of 4 ppm to a maximum of 24 ppm (from direct counting measurements). The average Th content of the si...