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镧,块, La, 25mm Max. Lump Size, 2N
镧,块, La, 25mm Max. Lump Size, 2N图片
品牌: Goodfellow
纯度含量: 99.0%
产地: 英国
索取资料及报价
品牌:Goodfellow
纯度含量:99.0%
产地:英国
产品介绍

Supplied in 100g bottles only.

订货号包装规格
Weight
637-787-8620g
023-738-6950g
697-634-61100g
832-256-07250g
549-852-13500g
596-729-071000g
661-997-461500g

产品参数

Maximum Lump Size[]25mm
Purity[纯度]99.0%
Weight[重量]20g - 2000g
Physical Properties(物理性质)
Boiling point ( C )3457
Density ( g cm⁻³ )6.174 @20℃
Atomic Properties(原子属性)
Atomic number57
Atomic weight ( amu )138.90550
Crystal structureHexagonal Close Packed/Face Centred Cubic
Electronic structureXe5d¹6s²
Ionisation potential ( No./eV )3 / 19.18
Ionisation potential ( No./eV )1 / 5.58
Ionisation potential ( No./eV )2 / 11.06
Natural isotope distribution ( Mass No./% )139 / 99.91
Natural isotope distribution ( Mass No./% )138 / 0.09
Photo-electric work function ( eV )3.50
Thermal neutron absorption cross-section ( Barns )8.9000
Valences shown3
Electrical Properties(电气特性)
Electrical resistivity ( μOhmcm )57@20℃
Superconductivity critical temperature ( K )4.8800
Temperature coefficient ( K⁻¹ )0.00218 @0-100℃
Mechanical Properties(机械性能)
Bulk modulus ( GPa ) ( Polycrystalline )24.8
Hardness - Vickers ( kgf mm⁻² ) ( Polycrystalline )40
Material conditionPolycrystalline
Poisson's ratio ( Polycrystalline )0.280
Tensile modulus ( GPa ) ( Polycrystalline )37.90
Tensile strength ( MPa ) ( Polycrystalline )131.00
Yield strength ( MPa ) ( Polycrystalline )124.0
Thermal Properties(热性能)
Coefficient of thermal expansion ( x10⁻⁶ K⁻¹ )4.900 @0-100℃
Latent heat of evaporation ( J g⁻¹ )2897
Latent heat of fusion ( J g⁻¹ )60.20
Melting point ( C )921.00
Specific heat ( J K⁻¹ kg⁻¹ )197.0 @25℃
Thermal conductivity ( W m⁻¹ K⁻¹ )13.40 @0-100℃

易燃

与火焰接触后点燃的化学品,或与水接触后逸出高度易燃气体的化学品。

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