Elements of the month - Silicon (Si) & Lanthanum (La)

2019-09-05

This year it's 150 years ago that Dmítriy Ivánovich Mendeléyev first published the Periodic Law that would later become the periodic table. Unesco has decided to celebrate this by calling 2019 "International Year of the Periodic Table of Chemical Elements" (IYPT).

Silicon and Lanthanum is the eight and ninth element in our series of elements found by Swedish researchers.

Silicon was officially discovered in 1823, Jöns Jacob Berzelius prepared amorphous silicon using approximately the same method as Gay-Lussac (reducing potassium fluorosilicate with molten potassium metal), but purifying the product to a brown powder by repeatedly washing it. As a result, he is usually given credit for the element's discovery.

The most widely used silicon device is the MOSFET (metal-oxide-silicon field-effect transistor), which is the most widely manufactured device in history. Free silicon is also used in the steel refining, aluminium-casting, and fine chemical industries (often to make fumed silica).

Lanthanum was first found by the Swedish chemist Carl Gustav Mosander in 1839 as an impurity in cerium nitrate – hence the name lanthanum, from the Ancient Greek λανθάνειν (lanthanein), meaning "to lie hidden".

Lanthanum compounds have numerous applications as catalysts, additives in glass, carbon arc lamps for studio lights and projectors, ignition elements in lighters and torches, electron cathodes, scintillators, GTAW electrodes, and other things.

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Elements of the month - Silicon (Si) & Lanthanum (La)

2019-09-05

This year it's 150 years ago that Dmítriy Ivánovich Mendeléyev first published the Periodic Law that would later become the periodic table. Unesco has decided to celebrate this by calling 2019 "International Year of the Periodic Table of Chemical Elements" (IYPT).

Silicon and Lanthanum is the eight and ninth element in our series of elements found by Swedish researchers.

Silicon was officially discovered in 1823, Jöns Jacob Berzelius prepared amorphous silicon using approximately the same method as Gay-Lussac (reducing potassium fluorosilicate with molten potassium metal), but purifying the product to a brown powder by repeatedly washing it. As a result, he is usually given credit for the element's discovery.

The most widely used silicon device is the MOSFET (metal-oxide-silicon field-effect transistor), which is the most widely manufactured device in history. Free silicon is also used in the steel refining, aluminium-casting, and fine chemical industries (often to make fumed silica).

Lanthanum was first found by the Swedish chemist Carl Gustav Mosander in 1839 as an impurity in cerium nitrate – hence the name lanthanum, from the Ancient Greek λανθάνειν (lanthanein), meaning "to lie hidden".

Lanthanum compounds have numerous applications as catalysts, additives in glass, carbon arc lamps for studio lights and projectors, ignition elements in lighters and torches, electron cathodes, scintillators, GTAW electrodes, and other things.