Catalog Number
ACM7440257-7
Product Name
Tantalum slug, 3.175mm (0.125in) dia x 3.175mm (0.125in) length, 99.95% (metals basis)
Description
Tantalum dust is a black odorless powder. mp: 2996° C, bp: approx. 5250°C. Density: 16.65 g/cm³. Insoluble in water. Tantalum oxide dust is a white, microcrystalline powder mp: 1800°C. Density: 7.6 g/cm³. Insoluble in water. The mixture is listed as a toxic inhalation hazard by OSHA.;DryPowder; DryPowder, OtherSolid; OtherSolid; PelletsLargeCrystals;BLACK SOLID IN VARIOUS FORMS.;Steel-blue to gray solid or black, odorless powder.;Metal: Steel-blue to gray solid or black, odorless powder.
Molecular Weight
180.9479g/mol
InChI Key
GUVRBAGPIYLISA-UHFFFAOYSA-N
Boiling Point
9797 °F at 760 mm Hg (NIOSH, 2016);5429 °C;5425 °C;9797°F;9797°F
Melting Point
5425 °F (NIOSH, 2016);2996 °C;2996 °C;5425°F;5425°F
Density
16.65 (metal), 14.40 (powder) (NIOSH, 2016);14.491 g/cu cm (powder); 16.6 g/cu cm (worked metal);14.5 g/cm³;16.65 (metal) 14.40 (powder);16.65 (metal) 14.40 (powder)
Solubility
Insoluble (NIOSH, 2016);Soluble in fused alkalies; insoluble in acids except hydrofluoric and fuming sulfuric acids;Insoluble in water.;Solubility in water: none;Insoluble
Application
The tantalum slug, measuring 3.175mm in diameter and length with a purity of 99.95% (metals basis), serves a crucial role in various applications due to its properties as a refractory metal. Its primary purpose is in the manufacture of capacitors and other electronic components, leveraging its excellent resistance to corrosion and chemical attacks. Tantalum, recognized by its steel-blue to gray solid form, is especially valued for its ability to maintain stability in harsh environments. This is mainly due to the protective oxide layer that forms naturally on its surface at ordinary temperatures, safeguarding it from most chemical interactions. In addition to electronic applications, tantalum is also employed in chemical equipment and corrosion-resistant tools. Its chemical inertness is key for these uses, although it reacts under specific conditions such as with concentrated acids or at high temperatures with fluorine, chlorine, or hydrogen. The versatility and stability of tantalum make it a vital component in advanced technologies and industrial applications.
Color/Form
Silvery gray metal, body-centered cubic crystal structure;CUBIC OR POWDER;Gray, very hard, malleable, ductile metal;Black powder; steel-blue-colored metal when unpolished, nearly platinum white when polished;Metal: Steel-blue to gray solid or black powder.
Covalently-Bonded Unit Count
1
EC Number
237-770-4;231-135-5
Heat of Vaporization
7.53X10+5 J/mol
MeSH Entry Terms
Tantalum;Tantalum 181;Tantalum-181
Monoisotopic Mass
180.948g/mol
Other Experimental
Atomic number: 73; can readily be drawn in fine wires; valences: 5, also 4, 3, 2.;Two naturally occurring isotopes: 181 (99.99877%); 180 (0.0123%) Half-life: >10+12 years; artificial isotopes: 172-179; 182-186;Specific heat (0 °C): 0.036 cal/g °C; Electrical resistivity: (18 °C): 12.4 microohm-cm;Very resistant to chemical attack; not attacked by aqueous acids other than hydrofluoric; not attacked by aqueous alkalies; slowly attacked by fused alkalies. Reacts with fluorine, chlorine, and oxygen only on heating. At high temperatures absorbs several hundred times its volume of hydrogen; combines with nitrogen, with carbon.;HAS GOOD "GETTERING" ABILITY @ HIGH TEMP;Tensile strength of drawn wire may be as high as 130,000 psi; expansion coefficient 8X10-6 over range 20-1500 °C; Electrical resistivity: 13.6 microohm-cm @ 0 °C; 32.0 microohm-cm @ 500 °C; dust or powder may be flammable.;99.5% pure tantalum is resistant to all concentrations of hot and cold sulfuric acid (except concentrated boiling); hydrochloric acid, nitric and acetic acids, hot and cold dilute sodium hydroxide, all dilutions of hot and cold ammonium hydroxide, mine and seawaters, moist sulfurous atmospheres, aqueous solutions of chlorine;Enthalpy of formation (gas) 782.0 kJ/mol; Heat capacity: 25.4 J/K mol (crystal); 20.9 J/K mol (gas);Thermal conductivity: 0.540 J/cm °C @ 20 °C; 0.680 J/cm °C @ 568 °C; 0.720 J/cm °C @ 828 °C; Enthalpy of fusion: 31,400 J/mol;Maximum valence +5; oxidation states of +4, +3, and +2 are known, but are unstable forms;The dry powder ignites spontaneously in air.
Refractive Index
Index of refraction: 2.05
Vapor Pressure
0 mm Hg (approx) (NIOSH, 2016);1 kPa @ 3024 °C; 10 Pa @ 3324 °C; 100 Pa @ 3684 °C; 1 kPa @ 4122 °C; 10 k Pa @ 4666 °C; 100 kPa @ 5361 °C;0 mmHg (approx);0 mmHg (approx)
