nerohh.blogg.se - Powdered antimony

Some antimony compounds were used as medicines to kill protozoans. Antimony is used as a dopant in electronics. Antimony(III) oxide is added to some glass to remove bubbles for things like television screens. It is also used in some alloys that have very little friction like Babbitt metal.Īnother use is in a catalyst for making some plastics. It is used as an alloy with lead in ammunition for small arms and in covering of cables as well. Some lead-free solder has antimony in it. It is used as an alloy with lead in the pipes of pipe organs. It is used in lead acid batteries, as well as some other things. This alloy, 5% antimony and 95% lead, is harder than pure lead. The antimony is separated and used.Ībout half of all antimony is used to make antimony trioxide for flame proofing. This makes iron(II) sulfide and antimony.

Another way to make antimony is to heat stibnite with scrap iron. The antimony trioxide is then heated with carbon to make carbon dioxide and antimony. The antimony trioxide gas is condensed in a container.

Other metal oxides in the stibnite ore do not evaporate. Since it gets so hot, the antimony trioxide is evaporated. Antimony is not used in the human body.Īntimony is made from stibnite by heating it with air. Other countries that make antimony are South Africa, Bolivia, and Kyrgyzstan. China is the biggest maker of antimony it makes 84% of all antimony. Antimony is sometimes found as an element, but normally it is found as stibnite, an antimony sulfide mineral. It is quite easy to get, though and is in many minerals. There is a question over what "stibium", the original name of antimony, meant.Īntimony is not common.

Antimony sulfide and antimony were confused sometimes in antiquity. The first native antimony was found in Sweden in 1783. The first time antimony was mentioned in Europe was in the 1540. Some things plated with antimony and made out of antimony were found in Egypt and Chaldea.

Antimony pentafluoride, colorless oily liquidĪntimony sulfide was known for a long time.

Antimony pentachloride, pale yellow liquid.

+5 compounds are strong oxidizing agents.

Antimony trisulfide, gray solid, flammableĪntimony tetroxide has antimony in both its +3 and +5 oxidation state.

Antimony trioxide, white solid, most common antimony compound.

Antimony triiodide, yellow solid, reacts with water.

Antimony trifluoride, light gray solid, dissolves in water.

Antimony trichloride, colorless or pale yellow soft solid, reacts with water.

Antimony tribromide, colorless solid, reacts with water.

They are the most common antimony compounds. Most of them are colorless or light yellow solids.

Stibine, unstable colorless gas made when antimonides react with acids.

The antimonides have properties between alloys and salts. Antimony pentafluoride is highly reactive, as well as antimony pentoxide. The other antimony(III) halides all react with water except for antimony trifluoride. Antimony trioxide is a white solid that dissolves a little in water. Antimony trichloride is a colorless and soft solid that has a strong odor. They are somewhat covalent, having low melting points. They react with acids to make the toxic and unstable gas stibine. They are made by reacting antimony with other metals. In excess air, it burns to antimony tetroxide.Ĭhemical compounds Īntimony forms chemical compounds in three oxidation states: -3, +3, and +5.

Antimony burns in air to make antimony trioxide. It does not corrode easily in air, although the black allotrope can corrode. It can dissolve in oxidizing acids like nitric or sulfuric acid. Sb- 123 and Sb-121Ĭhemical properties Īntimony is a rather unreactive element. When antimony is talked about it normally means the blue-white metalloid form, since it is most common.Īntimony is found as two stable (not radioactive) isotopes naturally. There is no chemical reaction the atoms in the antimony crystal are rearranging themselves. This antimony explodes when changing into the metallic form. There is another explosive form of antimony that is made by electrolysis of antimony trichloride. It can ignite spontaneously (without any ignition source like a spark or a flame). Black antimony is normally made by heating metallic antimony until it boils and then cooling the vapors very quickly. It turns into black antimony when light is shined on it or when it is warmer. Yellow antimony is only found at very cold temperatures. Yellow and black antimony are unstable nonmetals. The common allotrope of antimony is a blue-white metalloid.