Element Tantalum

Tantalum ElementIt is a chemical element with the symbol Ta and atomic number 73.
Previously known as tantalium, its name comes from Tantalus, a villain from Greek mythology. Tantalum is a rare, hard, blue-gray, lustrous transition metal that is highly corrosion-resistant.
Tantalum has been investigated for the treatment and prevention of Osteoarthritis, Knee Osteoarthritis, Intraoperative Bleeding, and Adolescent Idiopathic Scoliosis.
Its main use today is in tantalum capacitors in electronic equipment such as mobile phones, DVD players, video game systems and computers.
Tantalum, always together with the chemically similar niobium, occurs in the mineral groups tantalite, columbite and coltan (a mix of columbite and tantalite, though not recognised as a separate mineral species). Tantalum is considered a technology-critical element.

Names and Identifiers

Chemical Formula:Ta
CAS:7440-25-7
Molecular Weight:180.94800 g/mol
EC Number :231-135-5
MDL Number:MFCD00011252
Color:gray blue
Other Names:Tantale, Tantal, Tántalo
PubChem CID:23956
IUPAC Name:Tantalum
Inchl:InChI=1S/Ta
InChI Key:GUVRBAGPIYLISA-UHFFFAOYSA-N
Canonical SMILES:[Ta]
ICSC Number:1596

Physical & Chemical Properties

Phase:Solid
Density:16.69 g/cm³
Boiling Point:5731 K ​(5458 °C, ​9856 °F)
Melting Point:3290 K ​(3017 °C, ​5463 °F)
Molecular Formula:Ta
Flash Point:n/a
Exact Mass:180.94800
Symbol:Globally Harmonized System of ClassificationGlobally Harmonized System of Classification
Signal Word:Warning
Hazard Statements:H228-H315-H319-H335
Precautionary Statements:P210-P261-P305 + P351 + P338
Hazard Codes:F,Xi,Xn
Risk Phrases:11-36/37/38
Safety Phrases:S16-S26-S33-S36/37/39-S36
RIDADR:UN 3089 4.1/PG 2
WGK Germany:n/a
RTECS:n/a
Packaging Group:II
Hazard Class:4.1

Natural tantalum consists of two isotopes: 180mTa (0.012%) and 181Ta (99.988%). 181Ta is a stable isotope. 180mTa (m denotes a metastable state) is predicted to decay in three ways: isomeric transition to the ground state of 180Ta, beta decay to 180W, or electron capture to 180Hf.

Naturally occurring isotopes

IsotopeMass/DaNatural abundance (atom %)Nuclear spin (I)Magnetic moment (μ/μN)
180Ta179.947462 (4)0.012 (2)8
181Ta180.947992 (3)99.988 (2)7/22.371

Radiosotope data

IsotopeMass/DaHalf-lifeMode of decayNuclear spinNuclear magnetic moment
177Ta176.9444722.356 dEC to 177Hf7/22.25
178Ta177.94589.29 mEC to 178Hf12.74
179Ta178.945931.8 yEC to 179Hf7/2
180Ta179.9474668.15 hEC to 180Hf; β to 180W1
182Ta181.950152114.43 dβ to 182W33.02
183Ta182.9513735.1 dβ to 183 W7/22.36

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