Antimony Element Number 51 Sb

A large chunk of Antimony, showing a beautiful crystalline structure, Because of the toxic nature of this metal it is handled very carefully.  

This natural crystal is stibnite, and contains Antimony in the compound  Sb2S3. Stibnite crystals can be stunning when single rods grow very long.

 

Sb 51  AW:121.760  D:6.69  MP:1167  BP:2889  Mohs:3.0

Antimony is a toxic metalloid with a blueish grey tint. Antimony has been known for thousands of years in compounds. It is believed pure Antimony may have been used as a plating in 2200BC. Antimony can be found in pure form on earth.

Antimony is generally used in alloys and in Lead acid batteries. This element has other important uses in chemistry and other areas of industry.

Antimony has 4 allotropes,  3 of which are unstable. 2 stable isotopes exist, and 35 unstable isotopes. The unstable isotopes have short half lives, the longest being 2.75 years.

Antimony has many chemical compounds, uses include flame retardants, textiles, aircraft parts, glass additives, and semiconductor dopant. Alloys of Antimony are used in bullets, pewter, anti friction materials, and solders. Antimony also has a few uses in the medical field

Antimony can be used with Beryllium as a neutron start up source in nuclear reactors. A start up source produces the neutrons that begin the chain reactions in the fission material. 

Antimony is brittle, melting Antimony is dangerous, and should not be attempted unless familiar with the metal, and using proper equipment. Antimony dust is a hazard, as well as direct contact with skin. Antimony leaches out from "PET" plastic bottles, and like arsenic, can contaminate water.

Tellurium Element Number 52 Te

Here is a small round button of pure Tellurium, and a small piece of a broken ingot. Tellurium has beautiful crystalline structures. Because of Tellurium's toxic nature, these samples are handled very carefully

Te  52  AW:127.60  D6.24  MP:841.12  BP:1810  Mohs:2.25 

 Tellurium is a really cool element that forms awesome crystalline structures. Tellurium is very rare and that is partially due to the idea it had formed hydrides and was lost into space when the earth was young and hot. Tellurium is found in nature and some natural samples of Tellurium crystals are just stunning. Fuji is known for the finest Tellurium crystals in nature.

Tellurium has a compound in nature formed with Gold, such as Sylvanite but Tellurium is generally extracted from Copper and Lead mining. I read Sylvanite was discarded and used as pavement in one mining town, until it was discovered to contain Gold. Once Gold was discovered the town started mining the streets!!

Tellurium can be use for a few applications, such as alloys with Lead Copper and Iron. Lead can be improved by Tellurium, and helps Lead to resist Sulfuric acid.

Tellurides, such as Cadmium Telluride, are used in industries such as solar panels. Other uses of Tellurium include X ray and infrared detection, semi conductors, rewritable discs. and also  glass and ceramics.

Tellurium has risen in price in recent years, and as time goes by, may become very scarce. I am contemplating the minimum order of 1 kilo from my pals in China to secure a large sample before prices restrict my ability to expand on this cool metal.