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Lanthanum

Lanthanum is a chemical element; it has symbol La and atomic number 57. It is a soft, ductile, silvery-white metal that tarnishes slowly when exposed to air. It is the first and the prototype of the lanthanide series, a group of 15 similar elements between lanthanum and lutetium in the periodic table. Lanthanum is traditionally counted among the…

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137La
synth
138La
0.0890%
139La
99.9%
140La
synth
Appearance
silvery white
at T (K)
2005

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Overview

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Compounds

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Occurrence and production

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Biological role

Precautions

Bibliography

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Lanthanum

Nodes187
Edges186
Triples158
Avg. degree1.99
Density0.010695
Components1

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Lanthanum

Top relations

related to history · 25
Lanthanum → Although, Axel Erdmann, Axel Fredrik Cronstedt, Bastnäs, Berzelius, Between, Carl Gustaf Mosander, Carl Scheele, Ceres, Ceria, Finally, Germany, He, Hisinger, In, Jöns Jacob Berzelius, Karolinska Institute, Låven, Martin Heinrich Klaproth, Mosander
related to Physical · 12
Lanthanum → Among, Europium, For, However, II, In, LaO, Some, The, This, Thus, Xe
related to Prices · 12
Lanthanum → April, EUR/mt, FOB China, Institute, IREESM, Lanthanum Metal, Lanthanum Oxide, Rare Earths Elements, September, Strategic Metals, The, USD/Mt
related to Chemical · 11
Lanthanum → As, Hence, II, III, In, La, La3, OH, Some, Therefore, This
related to Occurrence and production · 11
Lanthanum → Bastnäsite, Ce, Despite, Earth's, La, La-dominant, MIIICO3F, MIIIPO4, Rare, The, The La3
related to Compounds · 8
Lanthanum → Due, La, La3, LaCl, LaOCl, Sc, The, When
is a · 6
Lanthanum → 28th most abundant element in the Earth's crust, chemical element, cofactor for the methanol dehydrogenase of the methanotrophic bacterium Methylacidiphilum fumariolicum SolV, least volatile of the lanthanides, soft metal, strongest and hardest base among the rare earth elements
has application · 6
Lanthanum → Actinophor, Atzgersdorf, Carl Auer, Modern, The, Welsbach
related to Isotopes · 6
Lanthanum → All, It, La, Naturally, Ta, The
related to Biological role · 5
Lanthanum → Fosrenol, GABA, La3, The, While

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Important terminology

la elements used cerium rare-earth oxide compounds lanthanides metal electrons rare first carbon lanthanide element high stable carbonate chemical yttrium

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
Lanthanum137Lasynth1.00infobox
Lanthanum138La0.0890%1.00infobox
Lanthanum139La99.9%1.00infobox
Lanthanum140Lasynth1.00infobox
LanthanumAppearancesilvery white1.00infobox
Lanthanumat T (K)20051.00infobox
LanthanumAtomic number (Z)571.00infobox
LanthanumAtomic radiusempirical: 187 pm1.00infobox
LanthanumBlockf-block1.00infobox
LanthanumBoiling point3737 K ​(3464 °C, ​6267 °F)1.00infobox
LanthanumBrinell hardness350–400 MPa1.00infobox
LanthanumBulk modulusα form: 27.9 GPa1.00infobox
LanthanumCAS Number7439-91-01.00infobox
LanthanumCovalent radius207±8 pm1.00infobox
LanthanumCrystal structureα form: ​double hexagonal close-packed (dhcp) (hP4)1.00infobox
LanthanumDensity (at 20° C)6.145 g/cm31.00infobox
LanthanumDiscoveryCarl Gustaf Mosander (1838)1.00infobox
LanthanumElectrical resistivityα, poly: 615 nΩ⋅m (at r.t.)1.00infobox
LanthanumElectron configuration[Xe] 5d1 6s21.00infobox
LanthanumElectronegativityPauling scale: 1.101.00infobox
LanthanumElectrons per shell2, 8, 18, 18, 9, 21.00infobox
LanthanumGroupf-block groups (no number)1.00infobox
LanthanumHeat of fusion6.20 kJ/mol1.00infobox
LanthanumHeat of vaporization400 kJ/mol1.00infobox
LanthanumIonization energies1st: 538.1 kJ/mol1.00infobox
LanthanumIonization energies2nd: 1067 kJ/mol1.00infobox
LanthanumIonization energies3rd: 1850.3 kJ/mol1.00infobox
LanthanumLattice constantsa = 0.37742 nm c = 1.2171 nm (at 20 °C)1.00infobox
LanthanumMagnetic orderingparamagnetic1.00infobox
LanthanumMain isotopes.mw-parser-output .isotopes-table{text-align:center;width:100%;border-collapse:collapse;margin:0;padding:0}.mw-parser-output .isotopes-table-headers>:not(:first-child){padding:0…1.00infobox

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