镧,块, La, 25mm Max. Lump Size, 2N - 半岛电竞官方网址

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镧,块, La, 25mm Max. Lump Size, 2N

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半岛bd体育手机客户端介绍

Supplied in 100g bottles only.

半岛bd体育手机客户端参数

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?? )	6.174 @20℃
Atomic Properties(原子属性)
Atomic number	57
Atomic weight ( amu )	138.90550
Crystal structure	Hexagonal Close Packed/Face Centred Cubic
Electronic structure	Xe5d?6s?
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 shown	3
Electrical Properties(电气特性)
Electrical resistivity ( μOhmcm )	57@20℃
Superconductivity critical temperature ( K )	4.8800
Temperature coefficient ( K?? )	0.00218 @0-100℃
Mechanical Properties(机械性能)
Bulk modulus ( GPa ) ( Polycrystalline )	24.8
Hardness - Vickers ( kgf mm?? ) ( Polycrystalline )	40
Material condition	Polycrystalline
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?? K?? )	4.900 @0-100℃
Latent heat of evaporation ( J g?? )	2897
Latent heat of fusion ( J g?? )	60.20
Melting point ( C )	921.00
Specific heat ( J K?? kg?? )	197.0 @25℃
Thermal conductivity ( W m?? K?? )	13.40 @0-100℃