Lanthanum reacts exothermically with hydrogen to produce the dihydride LaH 2, a black, pyrophoric, brittle, conducting compound with the calcium fluoride structure.
42.
Welsbach's flints consisted of pyrophoric alloys, 70 % cerium and 30 % iron, which when scratched or struck would give off sparks.
43.
He provided the Committee with a technical note on the breakaway corrosion of Magnox nuclear fuel, demonstrating the then hitherto undisclosed highly unstable pyrophoric reaction.
44.
It was thought that the remaining fuel could still reignite if disturbed, due to the presence of pyrophoric uranium hydride formed in the original water dousing.
45.
Iron is by far the most reactive element in its group; it is pyrophoric when finely divided and dissolves easily in dilute acids, giving Fe 2 +.
46.
The reactivity of the system can also be increased by exchanging the zinc copper couple for diethylzinc, however as this reagent is pyrophoric it must be handled carefully.
47.
Later designs used machined pits, but turning produces a large amount of waste, both as pyrophoric turnings of plutonium and plutonium-contaminated oils and cutting fluids.
48.
Another method involves the use of flint and steel, during which a spark ( a small particle of pyrophoric metal ) spontaneously combusts in air, starting fire instantaneously.
49.
The hydrolysis of trialkylaluminium compounds is a highly exothermic process, and the starting trialkylaluminium compounds are often pyrophoric ( i . e . burns on contact with air ).
50.
Due to its large surface area and high volume of contained hydrogen gas, dry, activated Raney nickel is a pyrophoric material that should be handled under an inert atmosphere.
