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- Gadolinium (Gd) Metal Synonyms:
Gadolinium metal (Gd), gadolinium, gadolinite, gadolínio, gadolinium pieces, gadolinium granules, gadolinium powder, gadolinium rod, gadolinium foil, CAS# 7440-54-2,
- Gadolinium (Gd) Metal Designations:
Chemical Name: Gadolinium
Chemical Formula: Gd
This silvery-white, rare earth metal is malleable and ductile. Gadolinium is relatively stable in dry air, but forms an oxide coating in moist air which falls off, exposing fresh metal. Gadolinium has unusual superconductive properties and when alloyed with iron, chromium or related meals is found to greatly improve workability and resistance to temperature and oxidation. Gadolinium also has unique magnetic properties.
99.9% (REO basis)
Pieces, granules, powder, rod, foil
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Atomic Number
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64
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Molecular Weight (g/mol.)
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157.25
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Apparent Density (g/cm3)
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7.89
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Heat of Fusion
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10.05 kJ·mol−1
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Specific Heat @25°C (cal/g-°C)
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.071
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Melting Point
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1585 K, 1312 °C, 2394 °F
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Boiling Point (°C)
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3546 K, 3273 °C, 5923 °F
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Thermal Conductivity (cal/s-cm-°C)
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.021
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Magnetic Ordering
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Ferromagnetic/ Paramagnetic
transition at 292 K
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Electrical Resistivity
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(r.t.) (α, poly) 1.310 µΩ·m
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Thermal Conductivity
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(300 K) 10.6 W·m−1·K−1
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Young's Modulus
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(α form) 54.8 GPa
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Crystallography
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hexagonal structure
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1) Because of extremely high neutron cross-section of gadolinium, this element is very effective for use with neutron radiography and in shielding of nuclear reactors. It is used as a secondary, emergency shut-down measure in some nuclear reactors, particularly of the CANDU type. Gadolinium is also used in nuclear marine propulsion systems as a burnable poison.
2) Gadolinium is an efficient catalyst used for decarboxylation of oxaloacetic acid, convertion of orto- to para-hydrogen and polymerization of ethylene.
3) Gadolinium also possesses unusual metallurgic properties, with as little as 1% of gadolinium improving the workability and resistance of iron, chromium, and related alloys to high temperatures and oxidation.
4) Because of their paramagnetic properties, solutions of organic gadolinium complexes and gadolinium compounds are used as intravenous MRI contrast agent to enhance images in medical magnetic resonance imaging. Magnevist is the most widespread example.
5) Gadolinium is used for making gadolinium yttrium garnet (Gd3Ga5O12); it has microwave applications and is used in fabrication of various optical components and as substrate material for magneto–optical films. Gadolinium compounds are also used for making phosphors for colour TV tubes, compact discs and computer memory.
Drums or to customer specification
Unknown. For further information please call the E.P.A. at 202.554.1404
CAS# 7440-54-2
3089
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