Indeed, the silver bands have wonderfully degenerated since the bit of thallium was put in, and for a reason worth knowing.
The simplest curve of this type will be obtained when only one compound is formed, as is the case with mercury and thallium.
thallium is a rare metal, whose atomic weight is 204.2, its symbol being Tl.
The iodide curve follows closely that of relative humidity, clouds, and rain; the thallium curve stands in no relation to it.
thallium has a bluish white tint and the lustre of lead; is so soft that it can be scratched by the finger nail.
That thallium affects the colour is most probable, but it is not necessarily the cause of the orange hue.
They are not absolutely insoluble in water, and the sulphide of thallium being brown, would probably be damaged by impure air.
On chromate of cadmium, made with bichromate of potash, thallium would naturally confer an orange hue.
The thallium papers show that the greatest effect is in the daytime, the iodide papers that it is at night.
thallium is a widely-diffused metal, being found in many minerals, particularly in iron- and copper-pyrites and native sulphur.
rare metallic element, 1861, Modern Latin, from Greek thallos "young shoot, green branch" (see thallus) + element name ending -ium. So called by its discoverer, Sir William Crookes (1832-1919), from the green line in its spectrum by which he detected it.
thallium thal·li·um (thāl'ē-əm)
A soft, malleable, highly toxic metallic element, used in photocells, infrared detectors, and low-melting glass. Atomic number 81; atomic weight 204.38; melting point 303.5°C; boiling point 1,473°C; specific gravity 11.85; valence 1, 3.
A soft, malleable, very poisonous metallic element that is used in photography, in making low-melting and highly refractive glass, and in treating skin infections. Atomic number 81; atomic weight 204.38; melting point 303.5°C; boiling point 1,457°C; specific gravity 11.85; valence 1, 3. See Periodic Table.