Assertion: iridium | /r/HasProperty | one of the rarest elements
Facets:
value: very
type: DEGREE
value: in the earth's crust
type: LOCATION
value: as an element
type: OTHER
value: on the surface of the earth
type: LOCATION
value: because of difficulty
type: CAUSE
value: at earth's surface
type: LOCATION
value: with a high investment point
type: OTHER
value: with a limited mining rate
type: OTHER
value: with location
type: OTHER
value: in real life
type: OTHER
value: with consumption
type: OTHER
Source sentences:
text: Iridium is one of the rarest elements in Earth's crust, with annual production and consumption of only three tonnes.
text: Iridium is a very hard, brittle and dense metal and is also very rare.
text: Iridium is a rare element able to create anti-protons.
text: In real life, iridium is a rare silver, brittle metal that can be hazardous in a fine dust and has toxic radioactive isotopes.
text: Although iridium is a rarer metal, its pricing depends on market volatility.
text: With a limited mining rate and location, iridium is a rare precious metal with a high investment point and a solid regular increase in value.
text: Iridium is one of the six platinum group elements and is one of rarest elements found on earth.
text: Like other metals in the platinum group, Iridium is a rare and expensive "noble metal" and is a transition metal.
text: Iridium is one of the rarest elements in the Earth's crust.
text: Iridium is also one of the rarest elements that we can find in the Earth’s crust.
text: Iridium is also one of the rarest elements on earth, with gold being 40 times more common in the earth’s crust than iridium.
text: Iridium is one of the rarest elements in the Earth's crust.
text: Iridium is one of the rarest elements in the Earth's crust.
text: Iridium is one of the rarest elements in the crust of the Earth with only three metric tons produced per year.
text: Iridium is one of the rarest elements on earth.
text: Iridium is one of the rarest elements on Earth, but can be found in one of the most ubiquitous aspects of modern life – the car.
text: This finding was significant as iridium is rare at Earth's surface (an unusually high concentration is called an iridium anomaly ).
text: Iridium in the Earth’s crust is also very rare.
text: Iridium in the Earth’s crust is very rare.
text: Iridium is rare because of it’s difficulty to separate from other materials.
text: As an element, iridium is rare in the Earth’s crust making it more valuable.
text: Iridium is extremely rare on the surface of the earth but much more common in meteorites.
text: Iridium is extremely rare in the Earth's crust because it is very dense and has the affinity for iron that characterizes the siderophile elements (see Goldschmidt classification), and therefore most of it sank into the Earth's core while the earth was still molten.
text: Iridium is a very rare element in the Earth's crust, but is found in anomalously high concentrations (around 100 times greater than normal) in a thin worldwide layer of clay marking the boundary between the Cretaceous and Paleogene periods, 66 million years ago.
text: Iridium is an extremely rare element.