Gallium (Ga)
post-transition-metalSolid
Masse atomique relative standard
69,723 uConfiguration électronique
[Ar] 4s2 3d10 4p1Point de fusion
29,76 °CPoint d’ébullition
2203,85 °CMasse volumique
5910 kg/m³États d’oxydation
−5, −4, −3, −2, −1, 0, +1, +2, +3Électronégativité (Pauling)
1,81Énergie d’ionisation (1re)
5,999302 eVAnnée de découverte
1875Rayon atomique
130 pmDétails
Gallium is a soft post-transition metal in group 13, chemically related to aluminium and indium. It is notable for melting just above room temperature, forming low-melting alloys, and supplying semiconductors through compounds such as gallium arsenide and gallium nitride. In nature it is dispersed rather than concentrated in its own ores, so it is recovered mainly as a by-product of aluminium and zinc processing.
It is one of four metals mercury, cesium, and rubidium which can be liquid near room temperature and, thus, can be used in high-temperature thermometers. It has one of the longest liquid ranges of any metal and has a low vapor pressure even at high temperatures.
There is a strong tendency for gallium to supercool below its freezing point. Therefore, seeding may be necessary to initiate solidification.
Ultra-pure gallium has a beautiful, silvery appearance, and the solid metal exhibits a conchoidal fracture similar to glass. The metal expands 3.1 percent on solidifying; therefore, it should not be stored in glass or metal containers, because they may break as the metal solidifies.
High-purity gallium is attacked only slowly by mineral acids.
The name derives from the Latin gallia for France. It was discovered in zinc blende by the French chemist Paul-Emile Lecoq de Boisbaudran in 1875. It was first isolated in 1878 by Lecoq de Boisbaudran and the French chemist Émile-Clément Jungflesch.
First proposed to exist by Dmitri Mendeleyev in 1871 based on gaps in his newly created Periodic Table of Elements, gallium was discovered spectroscopically by the French chemist Paul-Émile Lecoq de Boisbaudran in 1875. Later that same year, Lecoq was able to obtain pure gallium through the electrolysis of a solution of gallium hydroxide (Ga(OH)3) in potassium hydroxide (KOH). Trace amounts of gallium are found in diaspore, sphalerite, germanite and bauxite as well as in the byproducts of burning coal.
From the Latin word Gallia, France; also from Latin, gallus, a translation of "Lecoq," a cock. Predicted and described by Mendeleev as ekaaluminum, and discovered spectroscopically by Lecoq de Boisbaudran in 1875, who in the same year obtained the free metal by electrolysis of a solution of the hydroxide in KOH.
Pure gallium is a silvery, lustrous metal that is solid at ordinary room temperature but melts at about 30 °C. The solid is brittle enough to fracture, while the liquid readily wets many surfaces and can penetrate some metals, especially aluminium.
Gallium is used chiefly in compound semiconductors. Gallium arsenide (GaAs) is important in high-frequency electronics, optoelectronics, infrared light-emitting diodes, and some photovoltaic cells. Gallium nitride (GaN) is central to blue and ultraviolet light-emitting diodes, laser diodes, and efficient power electronics. Low-melting gallium alloys are used in thermometers, thermal interfaces, and specialized heat-transfer applications where mercury is undesirable. Radioisotopes such as ⁶⁷Ga and ⁶⁸Ga are used in diagnostic nuclear medicine.
Gallium melts near room temperature and has one of the largest liquid ranges of any metal, so it has found use in high temperature thermometers. Gallium easily forms alloys with most metals and has been used to create low melting alloys. Gallium is used as a doping material for semiconductors and has been used to produce solid-state items like transistors and light emitting diodes. Gallium arsenide (GaAs) can produce laser light directly from electricity. Large amounts of gallium trichloride (GaCl3) have been gathered to build the Gallium Neutrino Observatory, an observatory located in Italy built to study particles called neutrinos which are produced inside the sun during the process of nuclear fusion.
Gallium wets glass or porcelain and forms a brilliant mirror when it is painted on glass. It is widely used in doping semiconductors and producing solid-state devices such as transistors.
Magnesium gallate containing divalent impurities, such as Mn+2, is finding use in commercial ultraviolet-activated powder phosphors. Gallium arsenide is capable of converting electricity directly into coherent light. Gallium readily alloys with most metals, and has been used as a component in low-melting alloys.
Isotopes in Medicine
68Ga (with a half-life of 68 min) is a radioactive isotope that emits positrons, which are used to produce high-resolution imaging with positron emission tomography (PET). Unlike 18F, which is most commonly used, 68Ga is more easily produced using a cost-effective generator with the parent radionuclide 68Ge (with a half-life of 271 days) (Fig. IUPAC.31.1). Once produced, 68Ga easily couples to biomolecules (most commonly peptides) that target G-protein coupled receptors, which are over-expressed on human tumor cells. The labeled protein acts as a radioactive tracer for cancer diagnostics. PET images are often coupled with CT images to get a more complete picture of the body [256] I. Kayani, B. G. Conry, A. M. Groves, T. Win, J. Dickson, M. Caplin, J. B. Bomanji. J. Nucl. Med.50, 1927 (2009)., [257] M. Fani, J. P. André, H. R. Maecke. Contrast Media Mol. Imaging3, 67 (2008)., [258] G. J. Ehrhardt, M. J. Welch. J. Nucl. Med.19, 925 (1978)., [259] G. Ehrhardt, S. Wagner, M. J. Welch. J. Labelled Compd. Radiopharm.16, 111 (1979)., [260] M. V. Cantorias, S. D. Figueroa, T. P. Quinn, J. R. Lever, T. J. Hoffman, L. D. Watkinson, T. L. Carmack, C. S. Cutler. Nucl. Med. Biol.36, 505 (2009)., [261] J. C. Rold, T. L. Sieckman, G. L. Figueroa, S. D. Sublett, S. V. Engelbrecht, H. Cutler, C. S. Jurisson, S. S. Hoffman, T. J. Bottenus, B. N. Garrison. Trans. Am. Nucl. Soc.98, 802 (2008)., [262] J. Fitzsimmons, M. Fassbender, R. Atcher. J. Nucl. Med.48, 319 (2007).. Radiopharmaceutical 67Ga (with a half-life of 78 h) is a gamma-emitting isotope used in scintigraphy for medical imaging [263] S. M. Larson, P. B. Hoffer. “Normal patterns of localization”, in Gallium-67 Imaging, P. B. Hoffer, C. Bekerman, and R. E. Henkin (Eds.), John Wiley, New York (1978)., [264] A. Wirth, J. F. Seymour, R. J. Hicks, R. Ware, R. Fisher, M. Prince, M. P. MacManus, G. Ryan, H. Januszewicz, M. Wolf. Am. J. Med.112, 262 (2002)., [265] A. Vijayananthan, A. V. Arumugam, G. Kumar, D. Harichandra. Int. J. Biomed. Imaging4 (2), e23 (2008)..
Gallium most commonly adopts the +3 oxidation state, although lower-valent gallium chemistry is well established in specialized compounds. Gallium(III) oxide (Ga₂O₃) is a wide-band-gap oxide of growing interest for power and ultraviolet devices. Gallium arsenide (GaAs), gallium nitride (GaN), gallium phosphide (GaP), and gallium antimonide (GaSb) are important III-V semiconductors. Gallium(III) chloride (GaCl₃) is a Lewis acidic halide and forms many adducts. Gallium(III) salts often hydrolyze in water, reflecting the high charge density of Ga³⁺.
See more information at the Gallium compound page.
Compact gallium metal has low acute toxicity, but it can stain skin and damage aluminium parts by liquid-metal embrittlement. Dusts, fumes, and soluble gallium compounds require normal laboratory controls because toxicity depends strongly on compound form and exposure route. Gallium arsenide (GaAs) introduces additional concern from arsenic during machining, heating, or waste handling. Medical radioisotopes present isotope-specific radiation hazards.
Its toxicity appears to be of a low order, but should be handled with care until more data is available.
Gallium occurs at trace levels in many minerals, especially those associated with aluminium and zinc ores. It substitutes for chemically similar ions rather than forming abundant gallium minerals. Weathering and industrial processing can mobilize small amounts, but gallium is not a major nutrient and has no well-established biological role. Environmental concern is usually tied to mining residues, semiconductor waste, and associated elements such as arsenic rather than to metallic gallium alone.
Gallium supply is dominated by by-product recovery, especially from bauxite processing liquors and, to a lesser extent, zinc-processing streams. Because primary ores are not mined for gallium alone, output can be constrained by aluminium and zinc production, refinery technology, and purification capacity. Demand is driven mainly by semiconductor and optoelectronic materials, where high purity is essential. Recycling occurs from manufacturing scrap and some end-of-life material, but dispersed uses and complex devices limit complete recovery. Substitution is application-specific; silicon, silicon carbide, or other III-V compounds can replace gallium materials in some devices but not without design changes.
Gallium is often found as a trace element in diaspore, sphalerite, germanite, bauxite, and coal. Some flue dusts from burning coal have been shown to contain as much 1.5 percent gallium.
Gallium is a relatively rare element in the cosmos compared with lighter metals. Its stable isotopes, ⁶⁹Ga and ⁷¹Ga, are produced in stellar nucleosynthesis pathways involving neutron capture and related processes in evolved stars and supernova environments. In planetary materials it behaves as a moderately volatile, lithophile to chalcophile trace element and is used in geochemical studies of differentiation and volatility.
- Gallium expands on freezing, so solidification can break rigid containers.
- The liquid metal has an unusually wide liquid range before boiling.
- Gallium can diffuse into aluminium and make it crumble under stress.
- Natural gallium consists mainly of two stable isotopes, ⁶⁹Ga and ⁷¹Ga.
- Very high-purity gallium is needed for many semiconductor applications.
Images
Propriétés
Propriétés physiques
- Rayon atomique (empirique)
- 130 pm Comparer : Rayon atomique (empirique) de tous les éléments →
- Rayon covalent
- 122 pm Comparer : Rayon covalent de tous les éléments →
- Rayon de van der Waals
- 187 pm Comparer : Rayon de van der Waals de tous les éléments →
- Rayon métallique
- 125 pm Comparer : Rayon métallique de tous les éléments →
- Masse volumique
- 5910 kg/m³ Comparer : Masse volumique de tous les éléments →
- Volume molaire
- 0,0118 L/mol
- Phase aux CNTP
- Solide Comparer : Phase aux CNTP de tous les éléments →
- Point de fusion
- 29,76 °C Comparer : Point de fusion de tous les éléments →
- Point d’ébullition
- 2203,85 °C Comparer : Point d’ébullition de tous les éléments →
- Conductivité thermique
- 28,1 W/(m·K) Comparer : Conductivité thermique de tous les éléments →
- Capacité thermique massique
- 0,373 J/(g·K) Comparer : Capacité thermique massique de tous les éléments →
- Capacité thermique molaire
- 26,03 J/(mol·K) Comparer : Capacité thermique molaire de tous les éléments →
- Structure cristalline
- Orthorhombique Comparer : Structure cristalline de tous les éléments →
Propriétés chimiques
- Électronégativité (Pauling)
- 1,81 Comparer : Électronégativité (Pauling) de tous les éléments →
- Électronégativité (Allen)
- 1,756
- Affinité électronique
- 0,3 eV
- Énergie d’ionisation (1re)
- 5,999302 eV Comparer : Énergie d’ionisation (1re) de tous les éléments →
- Énergie d’ionisation (2e)
- 20,515211 eV Comparer : Énergie d’ionisation (2e) de tous les éléments →
- Énergie d’ionisation (3e)
- 30,725866 eV Comparer : Énergie d’ionisation (3e) de tous les éléments →
- Énergie d’ionisation (4e)
- 63,241218 eV Comparer : Énergie d’ionisation (4e) de tous les éléments →
- Énergie d’ionisation (5e)
- 86,010296 eV Comparer : Énergie d’ionisation (5e) de tous les éléments →
- États d’oxydation
- −5, −4, −3, −2, −1, 0, +1, +2, +3 Comparer : États d’oxydation de tous les éléments →
- Électrons de valence
- 3 Comparer : Électrons de valence de tous les éléments →
- Configuration électronique
- [Ar] 4s2 3d10 4p1
Propriétés thermodynamiques
- Point triple (température)
- 29,7666 °C
- Enthalpie de fusion
- 0,05793647 eV Comparer : Enthalpie de fusion de tous les éléments →
- Enthalpie de vaporisation
- 2,653262 eV Comparer : Enthalpie de vaporisation de tous les éléments →
- Enthalpie de sublimation
- 2,808727 eV
- Enthalpie d’atomisation
- 2,808727 eV
- Enthalpie d’atomisation
- 2,818676 eV
Propriétés nucléaires
- Protons
- 31 Comparer : Protons de tous les éléments →
- Neutrons
- 38 Comparer : Neutrons de tous les éléments →
- Isotopes connus
- 33 Comparer : Isotopes connus de tous les éléments →
- Isotopes stables
- 2 Comparer : Isotopes stables de tous les éléments →
- Isotope le plus stable
- Ga-69
- Année de découverte
- 1875
Abondance
- Abondance (croûte terrestre)
- 19 mg/kg Comparer : Abondance (croûte terrestre) de tous les éléments →
- Abondance (océan)
- 3 × 10−5 mg/L Comparer : Abondance (océan) de tous les éléments →
Structure cristalline
- Paramètre de maille a
- 451 pm
Structure électronique
- Électrons par couche
- 2, 8, 18, 3 Comparer : Électrons par couche de tous les éléments →
Identifiants
- Numéro CAS
- 7440-55-3 Comparer : Numéro CAS de tous les éléments →
- Symbole de terme
- 2P°1/2
- InChI
- InChI=1S/Ga
- Clé InChI
- GYHNNYVSQQEPJS-UHFFFAOYSA-N
Configuration électronique Mesuré
Ga: 3d¹⁰ 4s² 4p¹[Ar] 3d¹⁰ 4s² 4p¹1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p¹Modèle atomique
Les isotopes diffèrent par leur nombre de neutrons, leur masse et leur stabilité — pas par la configuration électronique de l’atome neutre.
Modèle atomique schématique, non à l’échelle.
Empreinte atomique
Spectre d’émission / d’absorption
Distribution isotopique
| Nombre de masse | Masse atomique (u) | Abondance naturelle | Demi-vie |
|---|---|---|---|
| 69 Stable | 68,9255735 ± 0,0000013 | 60,1080% | Stable |
| 71 Stable | 70,92470258 ± 0,00000087 | 39,8920% | Stable |
Phase / État
Explication: 4,8 °C en dessous du point de fusion (29,76 °C)
Schématique, non à l’échelle
Points de transition de phase
Énergies de transition
Énergie nécessaire pour faire fondre 1 mol au point de fusion
Énergie nécessaire pour vaporiser 1 mol au point d’ébullition
Énergie nécessaire pour sublimer 1 mol au point de sublimation
Masse volumique
Dans les conditions standard
Dans les conditions standard
Données avancées
Spectres atomiques
Affichage de 10 sur 31. Tri par charge ionique croissante.
Raies répertoriées ?
| Ion | Charge | Nombre total de raies | Probabilités de transition | Désignations des niveaux |
|---|---|---|---|---|
| Ga I | 0 | 342 | 23 | 342 |
| Ga II | +1 | 176 | 10 | 176 |
| Ga III | +2 | 113 | 2 | 113 |
| Ga IV | +3 | 594 | 0 | 594 |
| Ga V | +4 | 185 | 0 | 185 |
| Ga VI | +5 | 501 | 0 | 501 |
| Ga VII | +6 | 451 | 0 | 451 |
Niveaux répertoriés ?
| Ion | Charge | Niveaux |
|---|---|---|
| Ga I | 0 | 262 |
| Ga II | +1 | 96 |
| Ga III | +2 | 61 |
| Ga IV | +3 | 192 |
| Ga V | +4 | 92 |
| Ga VI | +5 | 158 |
| Ga VII | +6 | 181 |
| Ga VIII | +7 | 2 |
| Ga IX | +8 | 2 |
| Ga X | +9 | 2 |
Rayons ioniques
| Charge | Coordinence | Spin | Rayon |
|---|---|---|---|
| +3 | 4 | N/D | 47 pm |
| +3 | 5 | N/D | 55.00000000000001 pm |
| +3 | 6 | N/D | 62 pm |
Composés
Isotopes (2)
| Nombre de masse | Masse atomique (u) | Abondance naturelle | Demi-vie | Mode de désintégration | |
|---|---|---|---|---|---|
| 69 Stable | 68,9255735 ± 0,0000013 | 60,1080% ± 0,0090% | Stable | stable | |
| 71 Stable | 70,92470258 ± 0,00000087 | 39,8920% ± 0,0090% | Stable | stable |
Raies spectrales
| Longueur d’onde (nm) | Intensité | Degré d’ionisation | Type | Transition | Précision | Source | |
|---|---|---|---|---|---|---|---|
| 417.33 nm | N/D | ID 486 | emission | 3s2.3p3 2P* → 3s2.3p3 2P* | Mesurée | NIST | |
| 424.0525 nm | N/D | Ga I | emission | 4s2.5s 2S → 4s2.70p 2P* | Mesurée | NIST | |
| 424.0525 nm | N/D | Ga I | emission | 4s2.5s 2S → 4s2.70p 2P* | Mesurée | NIST | |
| 424.0651 nm | N/D | Ga I | emission | 4s2.5s 2S → 4s2.69p 2P* | Mesurée | NIST | |
| 424.0651 nm | N/D | Ga I | emission | 4s2.5s 2S → 4s2.69p 2P* | Mesurée | NIST | |
| 424.08 nm | N/D | Ga I | emission | 4s2.5s 2S → 4s2.68p 2P* | Mesurée | NIST | |
| 424.08 nm | N/D | Ga I | emission | 4s2.5s 2S → 4s2.68p 2P* | Mesurée | NIST | |
| 424.0924 nm | N/D | Ga I | emission | 4s2.5s 2S → 4s2.67p 2P* | Mesurée | NIST | |
| 424.0924 nm | N/D | Ga I | emission | 4s2.5s 2S → 4s2.67p 2P* | Mesurée | NIST | |
| 424.1098 nm | N/D | Ga I | emission | 4s2.5s 2S → 4s2.66p 2P* | Mesurée | NIST | |
| 424.1098 nm | N/D | Ga I | emission | 4s2.5s 2S → 4s2.66p 2P* | Mesurée | NIST | |
| 424.1257 nm | N/D | Ga I | emission | 4s2.5s 2S → 4s2.65p 2P* | Mesurée | NIST | |
| 424.1257 nm | N/D | Ga I | emission | 4s2.5s 2S → 4s2.65p 2P* | Mesurée | NIST | |
| 424.1406 nm | N/D | Ga I | emission | 4s2.5s 2S → 4s2.64p 2P* | Mesurée | NIST | |
| 424.1406 nm | N/D | Ga I | emission | 4s2.5s 2S → 4s2.64p 2P* | Mesurée | NIST | |
| 424.1588 nm | N/D | Ga I | emission | 4s2.5s 2S → 4s2.63p 2P* | Mesurée | NIST | |
| 424.1588 nm | N/D | Ga I | emission | 4s2.5s 2S → 4s2.63p 2P* | Mesurée | NIST | |
| 424.1761 nm | N/D | Ga I | emission | 4s2.5s 2S → 4s2.62p 2P* | Mesurée | NIST | |
| 424.1761 nm | N/D | Ga I | emission | 4s2.5s 2S → 4s2.62p 2P* | Mesurée | NIST | |
| 424.1948 nm | N/D | Ga I | emission | 4s2.5s 2S → 4s2.61p 2P* | Mesurée | NIST | |
| 424.1948 nm | N/D | Ga I | emission | 4s2.5s 2S → 4s2.61p 2P* | Mesurée | NIST | |
| 424.2157 nm | N/D | Ga I | emission | 4s2.5s 2S → 4s2.60p 2P* | Mesurée | NIST | |
| 424.2157 nm | N/D | Ga I | emission | 4s2.5s 2S → 4s2.60p 2P* | Mesurée | NIST | |
| 424.2367 nm | N/D | Ga I | emission | 4s2.5s 2S → 4s2.59p 2P* | Mesurée | NIST | |
| 424.2367 nm | N/D | Ga I | emission | 4s2.5s 2S → 4s2.59p 2P* | Mesurée | NIST | |
| 424.2582 nm | N/D | Ga I | emission | 4s2.5s 2S → 4s2.58p 2P* | Mesurée | NIST | |
| 424.2582 nm | N/D | Ga I | emission | 4s2.5s 2S → 4s2.58p 2P* | Mesurée | NIST | |
| 424.2826 nm | N/D | Ga I | emission | 4s2.5s 2S → 4s2.57p 2P* | Mesurée | NIST | |
| 424.2826 nm | N/D | Ga I | emission | 4s2.5s 2S → 4s2.57p 2P* | Mesurée | NIST | |
| 424.3887 nm | N/D | Ga I | emission | 4s2.5s 2S → 4s2.53p 2P* | Mesurée | NIST | |
| 424.3887 nm | N/D | Ga I | emission | 4s2.5s 2S → 4s2.53p 2P* | Mesurée | NIST | |
| 424.4204 nm | N/D | Ga I | emission | 4s2.5s 2S → 4s2.52p 2P* | Mesurée | NIST | |
| 424.4204 nm | N/D | Ga I | emission | 4s2.5s 2S → 4s2.52p 2P* | Mesurée | NIST | |
| 424.4531 nm | N/D | Ga I | emission | 4s2.5s 2S → 4s2.51p 2P* | Mesurée | NIST | |
| 424.4531 nm | N/D | Ga I | emission | 4s2.5s 2S → 4s2.51p 2P* | Mesurée | NIST | |
| 424.4886 nm | N/D | Ga I | emission | 4s2.5s 2S → 4s2.50p 2P* | Mesurée | NIST | |
| 424.4886 nm | N/D | Ga I | emission | 4s2.5s 2S → 4s2.50p 2P* | Mesurée | NIST | |
| 424.5261 nm | N/D | Ga I | emission | 4s2.5s 2S → 4s2.49p 2P* | Mesurée | NIST | |
| 424.5261 nm | N/D | Ga I | emission | 4s2.5s 2S → 4s2.49p 2P* | Mesurée | NIST | |
| 424.5675 nm | N/D | Ga I | emission | 4s2.5s 2S → 4s2.48p 2P* | Mesurée | NIST | |
| 424.5675 nm | N/D | Ga I | emission | 4s2.5s 2S → 4s2.48p 2P* | Mesurée | NIST | |
| 424.6112 nm | N/D | Ga I | emission | 4s2.5s 2S → 4s2.47p 2P* | Mesurée | NIST | |
| 424.6112 nm | N/D | Ga I | emission | 4s2.5s 2S → 4s2.47p 2P* | Mesurée | NIST | |
| 424.6563 nm | N/D | Ga I | emission | 4s2.5s 2S → 4s2.46p 2P* | Mesurée | NIST | |
| 424.6563 nm | N/D | Ga I | emission | 4s2.5s 2S → 4s2.46p 2P* | Mesurée | NIST | |
| 424.7046 nm | N/D | Ga I | emission | 4s2.5s 2S → 4s2.45p 2P* | Mesurée | NIST | |
| 424.7046 nm | N/D | Ga I | emission | 4s2.5s 2S → 4s2.45p 2P* | Mesurée | NIST | |
| 424.7569 nm | N/D | Ga I | emission | 4s2.5s 2S → 4s2.44p 2P* | Mesurée | NIST | |
| 424.7569 nm | N/D | Ga I | emission | 4s2.5s 2S → 4s2.44p 2P* | Mesurée | NIST | |
| 424.8143 nm | N/D | Ga I | emission | 4s2.5s 2S → 4s2.43p 2P* | Mesurée | NIST | |
| 424.8143 nm | N/D | Ga I | emission | 4s2.5s 2S → 4s2.43p 2P* | Mesurée | NIST | |
| 424.8743 nm | N/D | Ga I | emission | 4s2.5s 2S → 4s2.42p 2P* | Mesurée | NIST | |
| 424.8743 nm | N/D | Ga I | emission | 4s2.5s 2S → 4s2.42p 2P* | Mesurée | NIST | |
| 424.94 nm | N/D | Ga I | emission | 4s2.5s 2S → 4s2.41p 2P* | Mesurée | NIST | |
| 424.94 nm | N/D | Ga I | emission | 4s2.5s 2S → 4s2.41p 2P* | Mesurée | NIST | |
| 425.4789 nm | N/D | Ga I | emission | 4s2.5s 2S → 4s2.34d 2D | Mesurée | NIST | |
| 425.4799 nm | N/D | Ga I | emission | 4s2.5s 2S → 4s2.34d 2D | Mesurée | NIST | |
| 426.035 nm | N/D | Ga I | emission | 4s2.5s 2S → 4s2.30d 2D | Mesurée | NIST | |
| 426.0365 nm | N/D | Ga I | emission | 4s2.5s 2S → 4s2.30d 2D | Mesurée | NIST | |
| 426.6348 nm | N/D | Ga I | emission | 4s2.5s 2S → 4s2.27d 2D | Mesurée | NIST | |
| 426.6367 nm | N/D | Ga I | emission | 4s2.5s 2S → 4s2.27d 2D | Mesurée | NIST | |
| 427.1688 nm | N/D | Ga I | emission | 4s2.5s 2S → 4s2.25d 2D | Mesurée | NIST | |
| 427.1712 nm | N/D | Ga I | emission | 4s2.5s 2S → 4s2.25d 2D | Mesurée | NIST | |
| 427.8589 nm | N/D | Ga I | emission | 4s2.5s 2S → 4s2.23d 2D | Mesurée | NIST | |
| 427.8621 nm | N/D | Ga I | emission | 4s2.5s 2S → 4s2.23d 2D | Mesurée | NIST | |
| 428.7731 nm | N/D | Ga I | emission | 4s2.5s 2S → 4s2.21d 2D | Mesurée | NIST | |
| 428.7774 nm | N/D | Ga I | emission | 4s2.5s 2S → 4s2.21d 2D | Mesurée | NIST | |
| 429.3459 nm | N/D | Ga I | emission | 4s2.5s 2S → 4s2.20d 2D | Mesurée | NIST | |
| 429.3507 nm | N/D | Ga I | emission | 4s2.5s 2S → 4s2.20d 2D | Mesurée | NIST | |
| 430.0203 nm | N/D | Ga I | emission | 4s2.5s 2S → 4s2.19d 2D | Mesurée | NIST | |
| 430.026 nm | N/D | Ga I | emission | 4s2.5s 2S → 4s2.19d 2D | Mesurée | NIST | |
| 448.84 nm | N/D | ID 505 | emission | 5p 2P* → 5d 2D | Mesurée | NIST | |
| 459.16 nm | N/D | ID 505 | emission | 5s 2S → 5p 2P* | Mesurée | NIST | |
| 557 nm | N/D | ID 482 | emission | 1s.5s 3S → 1s.5p 3P* | Mesurée | NIST | |
| 567.7 nm | N/D | ID 498 | emission | 3s2.3p2 3P → 3s2.3p2 3P | Mesurée | NIST | |
| 587 nm | N/D | ID 482 | emission | 1s.4p 3P* → 1s.4d 3D | Mesurée | NIST | |
| 675 nm | N/D | ID 486 | emission | 3s2.3p3 2D* → 3s2.3p3 2D* | Mesurée | NIST | |
| 706.7 nm | N/D | ID 505 | emission | 4p 2P* → 4d 2D | Mesurée | NIST |
Propriétés étendues
Rayons covalents (données étendues)
- Rayon covalent (Pyykkö)
- 124 pm
- Rayon covalent (Pyykkö, liaison double)
- 117 pm
- Rayon covalent (Pyykkö, liaison triple)
- 121 pm
Rayons de van der Waals
- Bondi
- 187 pm
- Batsanov
- 210 pm
- Alvarez
- 232 pm
- UFF
- 438,3 pm
- MM3
- 246 pm
- Dreiding
- 439 pm
Rayons atomiques et métalliques
- Rayon atomique (Rahm)
- 233 pm
- Rayon métallique (C12)
- 140 pm
Échelles de numérotation
- Mendeleev
- 83
- Pettifor
- 81
- Glawe
- 79
Échelles d’électronégativité
- Ghosh
- 0
- Miedema
- 4
- Gunnarsson–Lundqvist
- 3
- Robles–Bartolotti
- 3
Polarisabilité et dispersion
- Polarisabilité dipolaire
- 50 a.u.
- Polarisabilité dipolaire (incertitude)
- 3 a.u.
- C₆
- 498 Ha·Bohr6
- C₆ (Gould–Bučko)
- 456 Ha·Bohr6
Paramètres de Miedema
- Volume molaire de Miedema
- 11,82 cm3/mol
- Densité électronique de Miedema
- 2
Risque d’approvisionnement et économie
- Concentration de la production
- 54
- Risque relatif d’approvisionnement
- 8
- Stabilité politique (principal producteur)
- 24
Transitions de phase et allotropes
| Point de fusion | 302,91 K |
| Point d’ébullition | 2502,15 K |
| Point triple (température) | 302,92 K |
Catégories d’états d’oxydation
Données de référence avancées
Constantes d’écran (8)
| n | Orbitale | σ |
|---|---|---|
| 1 | s | 0,6906 |
| 2 | p | 3,9092 |
| 2 | s | 8,401 |
| 3 | d | 15,9067 |
| 3 | p | 14,7964 |
| 3 | s | 14,0038 |
| 4 | p | 24,7784 |
| 4 | s | 23,9332 |
Détail des rayons cristallins (3)
| Charge | CN | Spin | rcrystal (pm) | Origine |
|---|---|---|---|---|
| 3 | IV | 61 | ||
| 3 | V | 69 | ||
| 3 | VI | 76 | from r^3 vs V plots, |
Modes de désintégration des isotopes (51)
| Isotope | Mode | Intensité |
|---|---|---|
| 56 | p | — |
| 57 | p | — |
| 58 | p | — |
| 59 | p | — |
| 60 | B+ | 100% |
| 60 | B+p | 1,6% |
| 60 | B+A | 0% |
| 61 | B+ | 100% |
| 61 | B+p | 0,3% |
| 62 | B+ | 100% |
Facteurs de diffusion des rayons X (506)
| Énergie (eV) | f₁ | f₂ |
|---|---|---|
| 10 | — | 2,98527 |
| 10,1617 | — | 2,98141 |
| 10,3261 | — | 2,97756 |
| 10,4931 | — | 2,9737 |
| 10,6628 | — | 2,96986 |
| 10,8353 | — | 2,96602 |
| 11,0106 | — | 2,95695 |
| 11,1886 | — | 2,90859 |
| 11,3696 | — | 2,86103 |
| 11,5535 | — | 2,81425 |
Données complémentaires
Estimated Crustal Abundance
The estimated element abundance in the earth's crust.
1.9×101 milligrams per kilogram
Références (1)
Estimated Oceanic Abundance
The estimated element abundance in the earth's oceans.
3×10-5 milligrams per liter
Références (1)
Sources
Sources of this element.
Gallium is often found as a trace element in diaspore, sphalerite, germanite, bauxite, and coal. Some flue dusts from burning coal have been shown to contain as much 1.5 percent gallium.
Références (1)
- [6] Gallium https://periodic.lanl.gov/31.shtml
Références
(9)
Data deposited in or computed by PubChem
The half-life and atomic mass data was provided by the Atomic Mass Data Center at the International Atomic Energy Agency.
Element data are cited from the Atomic weights of the elements (an IUPAC Technical Report). The IUPAC periodic table of elements can be found at https://iupac.org/what-we-do/periodic-table-of-elements/. Additional information can be found within IUPAC publication doi:10.1515/pac-2015-0703 Copyright © 2020 International Union of Pure and Applied Chemistry.
The information are cited from Pure Appl. Chem. 2018; 90(12): 1833-2092, https://doi.org/10.1515/pac-2015-0703.
Thomas Jefferson National Accelerator Facility (Jefferson Lab) is one of 17 national laboratories funded by the U.S. Department of Energy. The lab's primary mission is to conduct basic research of the atom's nucleus using the lab's unique particle accelerator, known as the Continuous Electron Beam Accelerator Facility (CEBAF). For more information visit https://www.jlab.org/
The periodic table at the LANL (Los Alamos National Laboratory) contains basic element information together with the history, source, properties, use, handling and more. The provenance data may be found from the link under the source name.
The periodic table contains NIST's critically-evaluated data on atomic properties of the elements. The provenance data that include data for atomic spectroscopy, X-ray and gamma ray, radiation dosimetry, nuclear physics, and condensed matter physics may be found from the link under the source name. Ref: https://www.nist.gov/pml/atomic-spectra-database
This section provides all form of data related to element Gallium.
The element property data was retrieved from publications.