Gallium

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I need To know about Gallium!I am doing a report about it at school. :( (unfortanatly)
If u have any info about gallium, ill try my best to help you with whatever you need[/b]

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what more do you need to know? That't not on this website?

[color=blue]Gallium (31) is placed right after Zinc (30) in the Periodic table ... And is a poor matal ... That's all I know ... lol :lol: [/color]

It also melts in your mouth and also in your hand. I mean its a liquid when touched to the human hand.

Ga
Atomic Number - 31
Atomic Weight - 69.72
Oxidation States: +3
Density, g/cm3 @ 20 C - 5.903
Melting Point - 29.78 C
Boiling Point - 1980 C

Gallium (Ga) derives its name from the Latin 'Gallia', meaning France. It was discovered and isolated by Lecoq de Boisbaudran in 1875. Gallium occurs in trace amounts in numerous minerals and in coal.

Gallium is one of the few metals that can be liquid near room temperature. It has the longest liquid range of all the metals. It has a very low vapor pressure, even at very high temperatures.

Pure gallium is a silvery metal with a high luster and has the ability to wet glass surfaces. For these reasons it is used to produce high quality mirrors. It also has an important use in doping semiconductor materials in the manufacture of transistors and other solid state devices. One of its compounds, gallium arsenide, is capable of converting sunlight directly into electricity.

Gallium is a chemical element in the periodic table that has the symbol Ga and atomic number 31. A rare, soft silvery metallic poor metal, gallium is brittle at low temperatures but is liquid above room temperature and can indeed melt in the hand. It occurs in trace amounts in bauxite and zinc ores. Gallium arsenide is used as a semiconductor, most notably in light-emitting diodes (LEDs).

Very-pure gallium has a stunning silvery color and its solid metal fractures conchoidally like glass. Gallium metal expands 3.1 percent when it solidifies and therefore should not be stored in either glass or metal containers. Gallium also corrodes most other metals by diffusing into their metal lattice.
Gallium is one of four metals (with caesium, mercury, and rubidium) which are liquid at near normal room temperature and can therefore be used in high-temperature thermometers. It is also notable for having one of the largest liquid ranges for a metal and for having a low vapor pressure at high temperatures.

This metal has a strong tendency to supercool below its melting point thus necessitating seeding in order to solidify. High-purity gallium is attacked slowly by mineral acids. The melting point temperature is very low, T=30 ?C, and the density is higher in the liquid state than in the crystalline state (like in the case of water; the opposite effect is normally found for metals).

Gallium does not crystallize in any of the simple crystal structures. The stable phase under normal conditions is orthorhombic with 8 atoms in the conventional unit cell. Each atom has only one nearest neighbor (at a distance of 2.44 ?) and six other neighbors within additional 0.39 ?. Many stable and metastable phases are found as function of temperature and pressure.

The bonding between the nearest neighbors is found to be of covalent character, hence Ga2 dimers is seen as the fundamental building block of the crystal. The compound, gallium arsenide can convert electricity directly into coherent light (this property is vital to light-emitting diodes).

Analog integrated circuits are the the most common application for gallium, with optoelectronic devices (mostly laser diodes and light-emitting diodes) as the second largest end use.
Other uses include:
Since it wets glass or porcelain, gallium is used to create brilliant mirrors.
Used widely to dope semiconductors and produce solid-state devices like transistors.
Gallium readily alloys with most metals, and has been used as a component in low-melting alloys.
Magnesium gallate containing impurities (such as Mn+2), is beginning to be used in ultraviolet-activated phosphor powder.

Gallium (Latin Gallia meaning "France"; also gallus, meaning "cock") was discovered spectroscopically by Lecoq de Boisbaudran in 1875 by its characteristic spectrum (two violet lines) in an examination of a zinc blende from the Pyrenees. Before its discovery, most of its properties had been predicted and described by Dmitri Mendeleev (who called the hypothetical element eka-aluminum) on the basis of its position in his periodic table. Later in 1875, Boisbaudran obtained the free metal through the electrolysis hydroxide in KOH solution. He named the element after his native land of France and, in one of those multilingual puns so beloved of men of science of the early 19th century, after himself, as 'Lecoq' = the rooster, and Latin for rooster is "gallus".

This true metal is oftentimes found as a trace component in bauxite, coal, diaspore, germanite, and sphalerite. Some flue dusts from burning coal have been shown to contain as much 1.5 percent gallium.

Perhaps you can lend some

Perhaps you can lend some expertise.. I'm researching an alloy with the following components Bi49.6 Pb26.5 Sn13.3 Cd9.9 Ea0.7 with presumed yield of 154.4 F. (no idea how this suspected yield is deturmined) I know the gallium should alloy readily but need to know the melting range. Can't find any references. Any answers of suggestions?

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