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

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

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Catalog Number

ACM7440257-2

CAS Number

7440-25-7

Product Name

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

Structure

Category

Evaporation Materials; Single Crystals; Nanopowders

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

Purity

99%, 99.9%, 99.99%, 99.999%

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

Appearance

Silvery-gray solid

Application

The Tantalum single crystal is designed to meet the demands of cutting-edge technology and research, thanks to its precise dimensions of 11-12mm in diameter and 100mm in length. With a (100) orientation and enhanced purity through zone refinement, it offers exceptional structural uniformity and optimal electrical properties. Tantalum, always closely associated with niobium due to their similar characteristics, shares applications in advanced fields, much like how niobium is utilized in high-temperature alloys and superconductors. The Tantalum single crystal serves a critical role in applications requiring precise control over material properties, making it an invaluable resource in scientific investigations and technological innovations.

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

Crystal Phase

α: body-centered cubic (bcc) / β: tetragonal

EC Number

237-770-4;231-135-5

Electrical Resistivity

131 nΩ·m (20 °C)

Exact Mass

180.948g/mol

Formal Charge

Hazard Statements

H228-H315-H319-H335

HeatOfFusion

36.57 kJ/mol

Heat of Vaporization

7.53X10+5 J/mol

Heavy Atom Count

ICSC Number

1596

MDL Number

MFCD00011252

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.

Precautionary Statements

P210-P261-P280-P305+P351+P338-P405-P501

Ratio

0.34

Refractive Index

Index of refraction: 2.05

Rotatable Bond Count

RTECS Number

WW5505000

Safety Description

26-36/37/39

Signal Word

Danger

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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