Gd Element

Molar mass of Gd = 157.25 g/mol

Convert grams Gd to moles or moles Gd to grams

GD&T - Profile Tolerancing PMPA Technical Conference Rapid Response to Make the Cut. Corona, California. Grand Rapids, MI. GD&T Symbol: Relative to Datum: Yes MMC or LMC applicable: Yes (Uncommon) Drawing Callout: Description: Angularity is the symbol that describes the specific orientation of one feature to another at a referenced angle. It can reference a 2D line referenced to another 2D element, but more commonly it relates the orientation of one surface plane.

Symbol# of AtomsGadoliniumGd157.251100.000%

In chemistry, the formula weight is a quantity computed by multiplying the atomic weight (in atomic mass units) of each element in a chemical formula by the number of atoms of that element present in the formula, then adding all of these products together.

Finding molar mass starts with units of grams per mole (g/mol). When calculating molecular weight of a chemical compound, it tells us how many grams are in one mole of that substance. The formula weight is simply the weight in atomic mass units of all the atoms in a given formula.

The atomic weights used on this site come from NIST, the National Institute of Standards and Technology. We use the most common isotopes. This is how to calculate molar mass (average molecular weight), which is based on isotropically weighted averages. This is not the same as molecular mass, which is the mass of a single molecule of well-defined isotopes. For bulk stoichiometric calculations, we are usually determining molar mass, which may also be called standard atomic weight or average atomic mass.

Using the chemical formula of the compound and the periodic table of elements, we can add up the atomic weights and calculate molecular weight of the substance.

If the formula used in calculating molar mass is the molecular formula, the formula weight computed is the molecular weight. The percentage by weight of any atom or group of atoms in a compound can be computed by dividing the total weight of the atom (or group of atoms) in the formula by the formula weight and multiplying by 100.

Formula weights are especially useful in determining the relative weights of reagents and products in a chemical reaction. These relative weights computed from the chemical equation are sometimes called equation weights.

A common request on this site is to convert grams to moles. To complete this calculation, you have to know what substance you are trying to convert. The reason is that the molar mass of the substance affects the conversion. This site explains how to find molar mass.

Chemical properties of gadolinium - Health effects of gadolinium - Environmental effects of gadolinium


Atomic mass

157.25 g.mol -1

Electronegativity according to Pauling



7.9 at 20°C

Melting point

1313 °C

Boiling point

3266 °C

Vanderwaals radius


Ionic radiusVst ableton 10.




Electronic shell

[ Xe ] 4f7 5d1 6s2

Energy of first ionisation

591.4 kJ.mol -1

Energy of second ionisation

1165.5 kJ.mol -1

Standard potential

- 2.40 V

Discovered by

Jean de Marignac in 1880

ElementGd element pronunciation


Gadolinium is a soft, shiny, ductile, silvery metal belonging to the lanthanide group of the periodic chart. The metal does not tarnish in dry air but an oxide film forms in moist air. Gadolinium reacts slowly with water and dissolves in acids. Gadolinium becomes superconductive below 1083 K. It is strongly magnetic at room temperature.


Gadolinium has found some use in control rods for nuclear reactors and nuclear power plants; it is used to make garnets for microwave applications and its compounds are used for making phosphorous for colour TV tubes. Metallic gadolinium is rarely used as the metal itself, but its alloys are used to make magnets and electronic components such as recording heads for video recorders. It is also used for manufacturing compact disks and computer memory.

Gadolinium in the environment

Gadolinium is one of the more abundant rare-earth elements. It is never found as free element in nature, but it is contained in many rare minerals. The main mining areas are Cina, USA, Brazil, Sri Lanka, India and Australia with reserves expected to exceed one million tonnes. World production of pure gadolinium is about 400 tonnes per year.

Health effects of gadolinium

Gadolinium, as the other lanthanides, forms compounds of low to moderate toxicity. Gadolinium salts irritate skin and eyes and are suspected to be tumorigens. Gadolinium toxicity has not been investigated in detail.

Environmental effects of gadolinium

Gadolilium poses no environmental threat to plants and animals.

Back to the periodic table of elements

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