Tellurium powder - Materials / Alfa Chemistry

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Tellurium powder

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Catalog Number

ACMA00021117

Product Name

Tellurium powder

Category

Description

Grayish-white, lustrous, brittle, crystalline solid; dark-gray to brown, amorphous powder with metallic characteristics. Used as a coloring agent in chinaware, porcelains, enamels, glass; producing black finish on silverware; semiconductor devices and research; manufacturing special alloys of marked electrical resistance. Improves mechanical properties of lead; powerful carbide stabilizer in cast iron, tellurium vapor in "daylight" lamps, vulcanization of rubber. Blasting caps. Semiconductor research. (EPA, 1998);DARK GREY-TO-BROWN AMORPHOUS POWDER, WITH METAL CHARACTERISTICS OR SILVERY-WHITE, LUSTROUS CRYSTALLINE SOLID.;Odorless, dark-gray to brown, amorphous powder or grayish-white, brittle solid.;Odorless, dark-gray to brown, amorphous powder or grayish-white, brittle solid.

IUPAC Name

tellurium

Molecular Weight

127.6g/mol

Molecular Formula

InChI

InChI=1S/Te

InChI Key

PORWMNRCUJJQNO-UHFFFAOYSA-N

Melting Point

842 °F (EPA, 1998);449.8 °C;449.5 °C;842°F;842°F

Density

6.24 (EPA, 1998);6.11-6.27;6.0-6.25 g/cm³;6.24;6.24

Solubility

Insoluble (NIOSH, 2016);Insol in benzene, carbon disulfide;INSOL IN HOT & COLD WATER, HYDROCHLORIC ACID; SOL IN NITRIC ACID, AQ REGIA, POTASSIUM CYANIDE, POTASSIUM HYDROXIDE, SULFURIC ACID;Solubility in water: none;Insoluble

Appearance

127.6

Color/Form

Grayish-white, lustrous, brittle, crystalline solid, hexagonal, rhombohedral structure;Dark-gray to brown, amorphous powder with metal characteristics

Complexity

Component

powder

Composition

When heated to decomposition it emits toxic fumes of /tellurium/.

Compound Is Canonicalized

Yes

Covalently-Bonded Unit Count

Defined Atom Stereocenter Count

Defined Bond Stereocenter Count

Deprecated CAS

137322-20-4

EC Number

236-813-4

Exact Mass

129.9062227g/mol

Formal Charge

Heat of Vaporization

46.0 kJ/g

Heavy Atom Count

Hydrogen Bond Acceptor Count

Hydrogen Bond Donor Count

ICSC Number

0986

Isotope Atom Count

MeSH Entry Terms

Tellurium

Monoisotopic Mass

129.9062227g/mol

Odor

Odorless.

Other Experimental

Vapor pressure between 511 and 835 °C is given by equation logP(kPa)= 6.7249-(5960.2/K);Diatomic in vapor state; atomic number 52, valence 2, 4, 6; in air dissolves in potassium hydroxide; electrical resistivity at 19.6 °C: 200,000 micro-ohms/cm; reacts with nitric acid, not with hydrochloric acid; linear coefficient of thermal expansion: 16.8X10-6/deg C; latent heat of fusion: 4.27 kcal/mol; hardness (Mohs): 2.3; magnetic susceptibility at 18 °C: -0.31X10-6 cgs; specific heat (solid): 0.047 cal/g/deg C;TELLURIUM BURNS IN AIR WITH A GREENISH-BLUE FLAME TO FORM TELLURIUM DIOXIDE;Combines with halogens, does not react with sulfur or selenium; modulus of elasticity: 6000000 psi. ... Eight stable isotopes: 120, 122, 123, 124, 125, 126, 128, 130; reacts with concentrated or fuming sulfuric acid

Refractive Index

INDEX OF REFRACTION: 1.0025; SADTLER REFERENCE NUMBER: 5272 (IR, PRISM)

Rotatable Bond Count

RTECS Number

WY2625000

Specific Surface Area

100-400 mesh

Stability

TARNISHES SLIGHTLY IN AIR

Topological Polar Surface Area

0Å²

Undefined Atom Stereocenter Count