silikon

silikon

An element with atomic number 14; symbol: Si. Silicon is the most abundant element besides oxygen in planets, and forms the basis for silicate minerals such as olivine, pyroxene, and plagioclase.

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Industry/Domain: Astronomy
Category: Planetary science
Company: PSRD
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silikon dioksid

Chemistry; Inorganic chemistry

SiO 2 Colorless, transparent crystals, soluble in molten alkalies and hydrofluoric acid; melts at 1710_C; used to make glass, ceramic products, abrasives, foundry molds, and ...

silikon nitrid

Chemistry; Inorganic chemistry

Si 3 N 4 A white, water-insoluble powder, resistant to thermal shock and to chemical reagents; used as a catalyst support and for stator blades of high-temperature gas turbines.

silikon-karbid

Chemistry; Inorganic chemistry

SiC Water-insoluble, bluish-black crystals, very hard and iridescent; soluble in fused alkalies; sublimes at 2210_C; used as an abrasive and a heat refractory, and in ...

silikon tetrafluorid

Chemistry; Inorganic chemistry

SiF 4 A colorless, suffocating gas absorbed readily by water, in which it decomposes; boiling point,_86_C; used in chemical analysis and to make fluosilicic acid. Also known as ...

silikon tetrahlorid

Chemistry; Inorganic chemistry

SiCl 4 A clear, corrosive, fuming liquid with suffocating aroma; decomposes in water and alcohol; boils at 57.6_C; used in warfare smoke screens, to make ethyl silicate and ...

Ceres

Astronomy; Planetary science

The largest of the known asteroids; a dwarf planet. Also called 1 Ceres because it was the first asteroid to be discovered (by Piazzi in 1801).

Jarkovski efekat

Astronomy; Planetary science

An explanation for the shift in an asteroid's orbit around the Sun due to a thermal thrust caused by the body's uneven heating by sunlight. The illuminated side of an asteroid ...

Viking

Astronomy; Planetary science

U. S. Mission to Mars, composed of two spacecraft, launched in 1975. Viking 1 and Viking 2 both consisted of an orbiter and a lander. Primary mission objectives were to obtain ...

sublimacija

Astronomy; Planetary science

Phase transformation from solid to gas.

Misija Stardust

Astronomy; Planetary science

The fourth in NASA's Discovery program of low-cost spacecraft with highly focused science goals, Stardust was comprised of a spacecraft and capsule that completed a seven-year, ...

Solarna i heliosfericna observatorija

Astronomy; Planetary science

A project of international collaboration between ESA and NASA to study the Sun from its deep core to the outer corona and the solar wind. SOHO was launched in December, 1995. SOHO ...

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