Home | Sell Offers | Buy Offers | Structure Search | Lanthanum Supplier

Lanthanum

Lanthanum General

Name:Lanthanum Symbol:La
Type:Transition Metal Atomic weight:138.9055
Density @ 293 K:6.16 g/cm3 Atomic volume:22.5 cm3/mol
Discovered:

Lanthanum was discovered by Carl G. Mosander in 1839 as the oxide (lanthana) in the mineral cerite. The element name comes from the Greek word 'lanthano', meaning to be hidden.

Lanthanum States

State (s, l, g):solid
Melting point:1193.2 K (920 °C) Boiling point:3733 K (3460 °C)

Lanthanum Energies

Specific heat capacity: 0.19 J g-1 K-1 Heat of atomization:414 kJ mol-1
Heat of fusion: 6.20 kJ mol-1 Heat of vaporization : 400 kJ mol-1
1st ionization energy: 538.1 kJ mol-1 2nd ionization energy:1067 kJ mol-1
3rd ionization energy:1850 kJ mol-1 Electron affinity:50 kJ mol-1

Lanthanum Oxidation & Electrons

Shells: 2,8,18,18,9,2 Electron configuration:[Kr] 5d1 6s2
Minimum oxidation number:0 Maximum oxidation number:3
Min. common oxidation no.:0 Max. common oxidation no.:3
Electronegativity (Pauling Scale):1.1 Polarizability volume:31.1 Å3

Lanthanum Appearance & Characteristics

Structure:hcp (hexagonal close-packed) Color:silvery-white
Hardness:2.5 mohs
Harmful effects:

Lanthanum and its compounds are considered to be moderately toxic.

Characteristics:

Lanthanum is a silvery-white soft metal, which can be cut with a knife. It is ductile, malleable and exposed surfaces tarnish rapidly in air forming the oxide. Lanthanum reacts with water to form lanthanum hydroxide plus hydrogen gas. Lanthanum is chemically reactive and forms compounds with carbon, nitrogen, boron, selenium, silicon, phosphorus, sulfur, and with the halogens.


Uses:

Lanthanum is used in large quantities in batteries for hybrid automobiles. It is used as an additive to make nodular cast iron and as an additive in steel. Lanthanum is used in hydrogen sponge alloys, which take up to 400 times their own volume of hydrogen gas. It is also used in flame lighter flints. Lanthanum compounds are widely used in carbon lighting applications such as for studio lighting and projection. Lanthanum oxide (La2O3) is used to make camera and telescope lenses.

Lanthanum Reactions

Reaction with air:vigorous, w/ht ⇒ La2O3 Reaction with 6 M HCl:mild, ⇒ H2, LaCl3
Reaction with 15 M HNO3:mild, ⇒ La(NO3)3 Reaction with 6 M NaOH:

Lanthanum Compounds

Oxide(s):La2O3 Chloride(s):LaCl3
Hydride(s):LaH2, LaH3

Lanthanum Radius

Atomic radius:195 pm Ionic radius (1+ ion):pm
Ionic radius (2+ ion):pm Ionic radius (3+ ion):117.2 pm
Ionic radius (2- ion):pm Ionic radius (1- ion):pm

Lanthanum Conductivity

Thermal conductivity:13.4 W m-1 K-1 Electrical conductivity: 1.9 x 106 S m-1

Lanthanum Abundance & Isotopes

Abundance earth's crust:34 parts per million by weight, 5 parts per million by moles
Abundance solar system:2 parts per billion by weight, 0.01 parts per billion by moles
Cost, pure:$233 per 100g
Cost, bulk:per 100g
Source:

Lanthanum is not found free in nature. It is found mainly in the minerals monazite and bastnasite. Commercially, it is recovered from monazite sand and bastnasite using various complex extraction techniques. Pure lanthanum is obtained by the reduction of the flouride with calcium metal.

Isotopes:

Lanthanum has 31 isotopes whose half-lives are known, with mass numbers 119 to 150. Of these, one is stable, 139La.

Lanthanum Other

Other:

 


Prev: Barium
Next: Cerium
Lanthanum7439-91-0Dayang Chem (Hangzhou) Co.,Ltd.Inquiry
Factory Supply Lanthanum7439-91-0Ality Chemical CorporationInquiry
Lanthanum7439-91-0Chemwill Asia Co., Ltd.Inquiry
LANTHANUM7439-91-0Hebei yanxi chemical co.,LTD.Inquiry
Lanthanum7439-91-0Hangzhou J&H Chemical Co., Ltd.Inquiry
Lanthanum(III) chloride heptahydrate10025-84-0Hangzhou Dingyan Chem Co., LtdInquiry
CAS7439-91-0 lanthanum atom7439-91-0Henan Tianfu Chemical Co., Ltd.Inquiry
Lanthanum oxide1312-81-8Hangzhou Dingyan Chem Co., LtdInquiry
Lanthanum7439-91-0Kono Chem Co.,LtdInquiry
Lanthanum7439-91-0Antimex Chemical LimiedInquiry
La Related Products