Lanthanum — La
The chemical element Lanthanum is an element of type Metal lanthanides with the symbol La. It has an atomic mass of 138.90547 u and an electronic configuration of [Xe] 5d1 6s2.
Synthétique
Radioactif
Liquide
Gaz
920°
3454°
3454°
138.90547
57
2
3
3
La
2
8
18
18
9
2
8
18
18
9
2
[Xe] 5d1 6s2
1.1
5.5769
Electronic configuration diagram
characteristics
- Atomic number
- 57
- Atomic mass
- 138.90547
- Symbol
- La
- Melting point
- 920
- Boiling point
- 3454
- Density
- 6.145
- Period
- 6
- Group
- 3
- Discovery
- 1839 Mosander
- Abundance
- 39
- Radius
- 2.7
- Electronegativity
- 1.1
- Ionization
- 5.5769
- Isotope
- 19
- Electronic configuration
- [Xe] 5d1 6s2
- Oxidation state
- 2,3
- Electron
- 2,8,18,18,9,2
Lanthanum is a chemical element, whose symbol is La and the atomic number 57. Its name comes from the ancient Greek lanthanum, which means "remains invisible".
lanthanum is a transition metal, which is in group 3 of the transition metals of the periodic table. It is a yellow-brown metal, very ductile and malleable, with an average density of 6.162 g/cm3. It is stable in air at room temperature and corrodes slowly in water and acid.
lanthanum has weak magnetic properties and only bonds with one other element, scandium. It forms a variety of compounds, including the most common sulfides, salts and oxides. It is widely used in protective clothing, glass and fireproof materials. It is also used in metal alloys, motors, electronic devices, lasers, heat shields and light reflectors.
lanthanum is one of the rarest and most expensive elements in the periodic table. Most industrial applications require a pure metal, as the presence of impurities can affect its properties and durability.
Minerals containing Lanthanum
| first name | Hardness | Density | Chemical formula |
|---|---|---|---|
| Agardite-(Ce) | — | 3.72 | Cu2+6Ce(AsO4)3(OH)6·3H2O |
| Agardite-(La) | — | 3.72 | Cu2+6La(AsO4)3(OH)6·3H2O |
| Agardite-(Nd) | — | 3.72 | Cu2+6Nd(AsO4)3(OH)6·3H2O |
| Allanite-(La) | — | 3.93 | CaLaAl2Fe2+(Si2O7)(SiO4)O(OH) |
| Aluminocerite-(Ce) | — | 4.68 | (Ce,Ca)9Al(SiO4)3(SiO3OH)4(OH)3 |
| Ancylite-(La) | — | 3.88 | LaSr(CO3)2(OH)·H2O |
| Arapovite | — | 3.43 | (K1-xx)(Ca,Na)2U4+Si8O20 (x~0.5) |
| Arisite-(La) | — | 4.07 | NaLa2(CO3)2[(CO3)1-xF2x]F |
| Arsenoflorencite-(Ce) | — | 4.10 | CeAl3(AsO4)2(OH)6 |
| Arsenoflorencite-(La) | — | 4.10 | LaAl3(AsO4)2(OH)6 |
| Arsenoflorencite-(Nd) | — | 4.05 | NdAl3(AsO4)2(OH)6 |
| Astrocyanite-(Ce) | — | 3.80 | Cu2Ce2(UO2)(CO3)5(OH)2·1.5H2O |
| Bario-olgite | — | 4.00 | Na(Na,Sr,Ce)2Ba(PO4)2 |
| Bastnäsite-(La) | — | 4.95 | LaCO3F |
| Belovite-(La) | — | 4.19 | NaLaSr3(PO4)3F |
| Biraite-(Ce) | — | 4.76 | Ce2Fe2+Si2O7(CO3) |
| Braitschite-(Ce) | — | 2.90 | Ca6.15Na0.85Ce2[B6O7(OH)3(O,OH)3]4·H2O |
| Britholite-(Ce) | — | 4.20 | (Ce,Ca)5(SiO4)3OH |
| Bussyite-(Ce) | — | 3.00 | (Na,H2O)6(Ce,REE)3Be5MnSi9(O,OH)30F4 |
| Byelorussite-(Ce) | — | 3.92 | NaBa2Ce2Mn2+Ti2Si8O26(F,OH)·H2O |
| Calcioburbankite | — | 3.45 | Na3(Ca,Ce,Sr,La)3(CO3)5 |
| Calciopetersite | — | 3.33 | Cu2+6Ca(PO4)2(PO3OH)(OH)6·3H2O |
| Calkinsite-(Ce) | — | 3.27 | Ce2(CO3)3·4H2O |
| Carbocernaite | — | 3.53 | (Sr,Ce,La)(Ca,Na)(CO3)2 |
| Carbokentbrooksite | — | 3.14 | (Na)12(Na,Ce)3Ca6Mn3Zr3NbSi25O73(OH)3(CO3)·H2O |
| Cerite-(Ce) | — | 4.86 | (Ce,La,Ca)9(Mg,Fe3+)(SiO4)3(SiO3OH)4(OH)3 |
| Cerite-(La) | — | 4.70 | (La,Ce,Ca)9(Fe3+,Ca,Mg)(SiO4)3(SiO3OH)4(OH)3 |
| Cervandonite-(Ce) | — | 0.00 | (Ce,Nd,La)(Fe3+,Ti,Fe2+,Al)3O2(Si2O7)1-x+y(AsO3)1+x-y(OH)3x-3y, x=0.5, y=0.3 |
| Chernovite-(Y) | — | 4.87 | YAsO4 |
| Chevkinite-(Ce) | — | 4.50 | Ce4(Ti,Fe2+,Fe3+)5O8(Si2O7)2 |
| Christofschäferite-(Ce) | — | 4.00 | (Ce,La,Ca)4Mn(Ti,Fe)3(Fe,Ti)(Si2O7)2O8 |
| Chukhrovite-(Nd) | — | 2.42 | Ca3NdAl2SO4F13·12H2O |
| Cordylite-(Ce) | — | 4.44 | (Na,Ca)BaCe2(CO3)4(F,O) |
| Cordylite-(La) | — | 4.33 | NaCaBa2La3Sr(CO3)8F2 |
| Coskrenite-(Ce) | — | 0.00 | Ce2(SO4)2(C2O4)·8H2O |
| Crichtonite | — | 4.46 | Sr(Mn,Y,U)Fe2(Ti,Fe,Cr,V)18(O,OH)38 |
| Daqingshanite-(Ce) | — | 3.81 | Sr3CePO4(CO3)3 |
| Davidite-(Ce) | — | 4.42 | Ce(Y,U)Fe2(Ti,Fe,Cr,V)18(O,OH,F)38 |
| Davidite-(La) | — | 4.42 | La(Y,U)Fe2(Ti,Fe,Cr,V)18(O,OH,F)38 |
| Decrespignyite-(Y) | — | 3.64 | Y4Cu(CO3)4Cl(OH)5·2H2O |
| Dingdaohengite-(Ce) | — | 4.83 | (Ce3+,La)4Fe2+(Ti,Fe2+,Mg,Fe3+)2Ti2Si4O22 |
| Dissakisite-(La) | — | 3.79 | CaLaMgAl2(Si2O7)(SiO4)O(OH) |
| Diversilite-(Ce) | — | 3.68 | Na2Ba6Ce2Fe2+Ti3Si12O36(OH)10·nH2O |
| Dyrnaesite-(La) | — | 3.68 | Na8Ce4+(La,REE)2(PO4)6 |
| Feklichevite | — | 2.87 | Na11Ca9(Fe3+,Fe2+)2Zr3Nb(Si25O73)(OH,H2O,Cl,O)5 |
| Fergusonite-(Ce) | — | 5.48 | CeNbO4·0.3H2O |
| Ferriakasakaite-(La) | — | 0.00 | CaLaFe3+AlMn2+(Si2O7)(SiO4)O(OH) |
| Ferriallanite-(La) | — | 4.21 | CaLaFe3+AlFe2+(SiO4)(Si2O7)O(OH) |
| Ferriandrosite-(La) | — | 0.00 | MnLaFe3+AlMn2+(Si2O7)(SiO4)O(OH) |
| Ferronordite-(La) | — | 3.54 | Na3SrLaFe2+Si6O17 |
| Florencite-(La) | — | 3.52 | LaAl3(PO4)2(OH)6 |
| Fluocerite-(Ce) | — | 6.13 | CeF3 |
| Fluocerite-(La) | — | 5.93 | LaF3 |
| Fluorbritholite-(Ce) | — | 4.66 | (Ce,Ca)5(SiO4)3F |
| Fluorcalciobritholite | — | 4.20 | (Ca,REE)5(SiO4,PO4)3F |
| Gadolinite-(Ce) | — | 4.20 | Fe2+Be2Ce2(SiO4)2O2 |
| Galgenbergite-(Ce) | — | 0.00 | CaCe2(CO3)4·H2O |
| Gatelite-(Ce) | — | 4.51 | (Ca,Ce)4(Al,Mg,Fe)4(Si2O7)(SiO4)3(O,F,OH)3 |
| Golyshevite | — | 2.89 | Na10Ca9Zr3Fe2SiNb(Si3O9)2(Si9O27)2(OH)3(CO3)·H2O |
| Gramaccioliite-(Y) | — | 4.66 | (Pb,Sr)(Y,Mn)Fe3+2(Ti,Fe3+)18O38 |
| Graulichite-(Ce) | — | 3.90 | CeFe3+3(AsO4)2(OH)6 |
| Gysinite-(Nd) | — | 4.82 | PbNd(CO3)2(OH)·H2O |
| Håleniusite-(La) | — | 6.50 | LaOF |
| Hibonite | — | 3.84 | (Ca,Ce)(Al,Ti,Mg)12O19 |
| Hingganite-(Ce) | — | 4.28 | BeCe(SiO4)(OH) |
| Hingganite-(Y) | — | 0.00 | BeY(SiO4)(OH) |
| Hydroxylbastnäsite-(La) | — | 4.70 | LaCO3(OH) |
| Ikranite | — | 2.82 | (Na,H3O)15(Ca,Mn,REE)6Fe3+2Zr3Si24O66(O,OH)6Cl·nH2O |
| Ilímaussite-(Ce) | — | 3.60 | (Ba,Na)10K3Na4.5Ce5(Nb,Ti)6O6(Si12O36)(Si9O18)(O,OH)24 |
| Ilmajokite | — | 2.20 | (Na,Ce,Ba)10Ti5Si14O22(OH)44·nH2O |
| Iraqite-(La) | — | 3.27 | KCa4(La,Ce,Th)2Si16O40 |
| Isolueshite | — | 4.72 | NaNbO3 |
| Johnsenite-(Ce) | — | 3.20 | Na12Ce3Ca6Mn3Zr3WSi25O73(CO3)(OH)2 |
| Karnasurtite-(Ce) | — | 2.89 | CeTiAlSi2O7(OH)4·3H2O |
| Kochite | — | 3.32 | Na(Na,Ca)2Ca2(Mn,Ca)ZrTi(Si2O7)2(F,O)4 |
| Kozoite-(La) | — | 4.16 | LaCO3(OH) |
| Kozoite-(Nd) | — | 4.77 | NdCO3(OH) |
| Kuannersuite-(Ce) | — | 4.66 | Na2Ce2Ba6(PO4)6FCl |
| Kukharenkoite-(La) | — | 4.65 | Ba2La(CO3)3F |
| Lakargiite | — | 4.59 | CaZrO3 |
| Lanthanite-(Ce) | — | 2.76 | Ce2(CO3)3·8H2O |
| Lanthanite-(La) | — | 2.61 | La2(CO3)3·8H2O |
| Lanthanite-(Nd) | — | 2.81 | Nd2(CO3)3·8H2O |
| Levinsonite-(Y) | — | 2.18 | YAl(SO4)2(C2O4)·12H2O |
| Loparite-(Ce) | — | 4.77 | (Na,Ce,Sr)(Ce,Th)(Ti,Nb)2O6 |
| Loveringite | — | 4.41 | (Ca,Ce,La)(Zr,Fe)(Mg,Fe)2(Ti,Fe,Cr,Al)18O38 |
| Manganiandrosite-(Ce) | — | 0.00 | Mn2+Ce3+AlMn3+Mn2+(Si2O7)(SiO4)O(OH) |
| Manganiandrosite-(La) | — | 4.21 | LaMn2+2Mn3+Al(Si2O7)(SiO4)O(OH) |
| Melanocerite-(Ce) | — | 4.13 | Ce5(SiO4,BO4)3(OH,O) |
| Menezesite | — | 4.18 | Ba3MgZr4Nb12O42·12H2O |
| Mogovidite | — | 2.90 | Na9(Ca,Na)12Fe2Zr3Si25O72(CO3)(OH)4 |
| Monazite-(Ce) | — | 4.80 | CePO4 |
| Monazite-(La) | — | 4.80 | LaPO4 |
| Monazite-(Nd) | — | 4.80 | NdPO4 |
| Nacareniobsite-(Ce) | — | 3.45 | Na3Ca3CeNb(Si2O7)2OF3 |
| Nordite-(Ce) | — | 6.43 | Na3SrCeZnSi6O17 |
| Nordite-(La) | — | 3.43 | Na3SrLaZnSi6O17 |
| Orthojoaquinite-(La) | — | 4.10 | NaBa2La2Fe2+Ti2Si8O26(OH,O,F)·H2O |
| Paratooite-(La) | — | 0.00 | (La,Ca,Na,Sr)6Cu(CO3)8 |
| Parisite-(Ce) | — | 4.36 | CaCe2(CO3)3F2 |
| Parisite-(La) | — | 0.00 | CaLa2(CO3)3F2 |
| Parisite-(Nd) | — | 4.20 | CaNd2(CO3)3F2 |
| Peprossiite-(Ce) | — | 3.45 | (Ce,La)(Al3O)2/3B4O10 |
| Percleveite-(Ce) | — | 5.21 | Ce2Si2O7 |
| Perrierite-(Ce) | — | 4.29 | Ce4MgFe3+2Ti4+2O8(Si2O7)2 |
| Perrierite-(La) | — | 0.00 | (La,Ce,Ca)4(Fe2+,Mn)(Ti,Fe3+,Al)4(Si2O7)2O8 |
| Petersenite-(Ce) | — | 3.69 | Na4Ce2(CO3)5 |
| Piergorite-(Ce) | — | 0.00 | Ca8Ce2AlLiSi6B8O36(OH)2 |
| Plumboagardite | — | 3.74 | Cu2+6(Pb,La,Nd,Ce,Ca)(AsO4)3(OH)6·3H2O |
| Polyakovite-(Ce) | — | 4.75 | (Ce,Ca)4MgCr2(Ti,Nb)2Si4O22 |
| Qaqarssukite-(Ce) | — | 0.00 | BaCe(CO3)2F |
| Rémondite-(Ce) | — | 3.43 | Na3(Ce,La,Ca,Na,Sr)3(CO3)5 |
| Rémondite-(La) | — | 3.50 | Na3(La,Ce,Ca)3(CO3)5 |
| Retzian-(La) | — | 4.49 | Mn2+2LaAsO4(OH)4 |
| Retzian-(Nd) | — | 4.45 | Mn2+2Nd(AsO4)(OH)4 |
| Rhabdophane-(Ce) | — | 4.00 | CePO4·H2O |
| Rhabdophane-(La) | — | 3.94 | LaPO4·H2O |
| Rhabdophane-(Nd) | — | 4.00 | NdPO4·H2O |
| Röntgenite-(Ce) | — | 4.19 | Ca2Ce3(CO3)5F3 |
| Samarskite-(Yb) | — | 7.03 | YbNbO4 |
| Sazhinite-(La) | — | 0.00 | Na3LaSi6O15·2H2O |
| Stavelotite-(La) | — | 4.49 | La3Mn2+3Cu2+(Mn3+,Fe3+,Mn4+)26(Si2O7)6O30 |
| Stillwellite-(Ce) | — | 4.57 | CeBSiO5 |
| Strontiochevkinite | — | 5.44 | (Sr,Ce,La)4Fe2+(Ti,Zr)4O8(Si2O7)2 |
| Törnebohmite-(Ce) | — | 4.90 | Ce2Al(SiO4)2(OH) |
| Törnebohmite-(La) | — | 4.94 | La2Al(SiO4)2(OH) |
| Tritomite-(Ce) | — | 4.20 | Ce5(SiO4,BO4)3(OH,O) |
| Tritomite-(Y) | — | 3.05 | Y5(SiO4,BO4)3(O,OH,F) |
| Tundrite-(Ce) | — | 4.08 | Na2Ce2TiO2SiO4(CO3)2 |
| Tundrite-(Nd) | — | 3.70 | Na2Nd2TiO2(SiO4)(CO3)2 |
| Uedaite-(Ce) | — | 4.19 | Mn2+CeAl2Fe2+(Si2O7)(SiO4)O(OH) |
| Vanadoallanite-(La) | — | 0.00 | CaLa3+V3+AlFe2+(Si2O7)(SiO4)O(OH) |
| Vanadoandrosite-(Ce) | — | 0.00 | Mn2+CeV3+AlMn2+O(Si2O7)(SiO4)(OH) |
| Västmanlandite-(Ce) | — | 4.51 | Ce3CaMg2Al2Si5O19(OH)2F |
| Vicanite-(Ce) | — | 4.73 | (Ca,Ce,La,Th)15As5+(As3+,Na)0.5Fe3+0.7Si6B4(O,F)47 |
| Vitusite-(Ce) | — | 3.60 | Na3Ce(PO4)2 |
| Voronkovite | — | 2.97 | Na15(Na,Ca,Ce)3(Mn,Ca)3Fe3Zr3Si26O72(OH,O)4Cl·H2O |
| Wakefieldite-(La) | — | 4.70 | LaVO4 |
| Zhonghuacerite-(Ce) | — | 4.20 | Ba2Ce(CO3)3F |
| Zugshunstite-(Ce) | — | 0.00 | CeAl(SO4)2(C2O4)·12H2O |