CAS 7440-25-7 Tantalum single crystal, 11-12mm (0.43-0.47in) dia, 100mm (3.9in) long, random orientation, zone refined

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Tantalum single crystal, 11-12mm (0.43-0.47in) dia, 100mm (3.9in) long, random orientation, zone refined

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Catalog Number

ACM7440257-3

CAS Number

7440-25-7

Product Name

Tantalum single crystal, 11-12mm (0.43-0.47in) dia, 100mm (3.9in) long, random orientation, zone refined

Structure

Category

Metal; Single Crystals

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.

IUPAC Name

tantalum

Molecular Weight

180.9479g/mol

Molecular Formula

Canonical SMILES

[Ta]

InChI

InChI=1S/Ta

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

Flash Point

>250 °C

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 purpose of the tantalum single crystal, measuring 11-12 mm in diameter and 100 mm in length with a random orientation and refined through zone refining, is to offer a high-purity material ideally suited for applications that require exceptional resistance to corrosion and high-temperature stability. Tantalum, closely associated with niobium, shares similar structural properties, making it an ideal candidate for use in environments that demand robust performance. The random orientation of the crystal ensures uniform properties across its structure, aligning with the needs of industries that require durable and reliable materials for high-stress applications. Through advanced refining techniques, the tantalum single crystal achieves superior quality and purity, underscoring its importance in specialized technological and industrial uses.

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.

Complexity

Covalently-Bonded Unit Count

EC Number

237-770-4;231-135-5

Exact Mass

180.948g/mol

Formal Charge

Heat of Vaporization

7.53X10+5 J/mol

Heavy Atom Count

ICSC Number

1596

MeSH Entry Terms

Tantalum;Tantalum 181;Tantalum-181

Monoisotopic Mass

180.948g/mol

Odor

Odorless

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

Rotatable Bond Count

RTECS Number

WW5505000

UNII

6424HBN274

UN Number

3089;3089

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)

MSDS

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COA

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Spec Sheet

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