Group Number
Not Available
Not Available
Element Family
Lanthanide
Actinide
Space Group Name
P63/mmc
Not Available
Space Group Number
Not Available
Interesting Facts
- Holmium metal is very soft and malleable.
- Holmium metal is well known for its corrosion resistivity.
- Mendelevium metal is synthetically produced metal.
- Mendelevium metal has been produced in only trace amount.
Sources
Found in Minerals, Mining, Ores of Minerals
Bombarding Einsteinium with Helium Ions
Who Discovered
Marc Delafontaine
Lawrence Berkeley National Laboratory
Discovery
In 1878
In 1955
Abundance In Universe
Not Available
Abundance In Meteorites
Not Available
Abundance In Earth's Crust
Not Available
Abundance In Oceans
Not Available
Uses & Benefits
- Holmium metal has an ability to absorb neutrons, so this metal is used in nuclear reactors to keep the chain reactions of elements under control.
-
Alloys of Holmium are used to produce Magnet.
- Currently known uses of Mendelevium metal are limited to research purpose only.
Other Uses
Alloys, Nuclear Research
NA
Toxicity
Low Toxic
Unknown
Present in Human Body
No
No
Boiling Point
Not Available
Physical State
Solid
Solid
Color
Silvery White
Unknown
Brinell Hardness
Not Available
Vickers Hardness
Not Available
Speed of Sound
Not Available
α Allotropes
Not Available
Not Available
β Allotropes
Not Available
Not Available
γ Allotropes
Not Available
Not Available
Pauling Electronegativity
Allred Rochow Electronegativity
Pauling Electropositivity
Electrochemical Equivalent
Electron Work Function
Not Available
Not Available
Other Chemical Properties
Chemical Stability, Anti Corrosion, Ionization, Radioactive Isotopes, Solubility
Ionization, Radioactive Isotopes, Radioactivity
Electron Configuration
[Xe] 4f11 6s2
[Rn] 5f13 7s2
Crystal Structure
Hexagonal Close Packed (HCP)
Not Known
Crystal Lattice
HCP-Crystal-Structure-of-Holmium.jpg#100
Unknown-Crystal-Structure-of-Mendelevium.jpg#100
Atomic Radius
Not Available
Covalent Radius
Not Available
Atomic Volume
Not Available
Valence Electron Potential
Not Available
Lattice Constant
Not Available
Lattice Angles
π/2, π/2, 2 π/3
NA
Lattice C/A Ratio
Not Available
Density At Room Temperature
Not Available
Density When Liquid (at m.p.)
Not Available
Tensile Strength
Not Available
Not Available
Viscosity
Not Available
Not Available
Vapor Pressure at 1000 K
Not Available
Shear Modulus
Not Available
Bulk Modulus
Not Available
Young's Modulus
Not Available
Poisson Ratio
Not Available
Other Mechanical Properties
Ductile, Malleable, Sectile
Unknown
Specific Gravity
Not Available
Magnetic Ordering
Paramagnetic
Unknown
Electrical Property
Conductor
Unknown
Resistivity
Not Available
Electrical Conductivity
Not Available
Electron Affinity
Not Available
Specific Heat
Not Available
Molar Heat Capacity
Not Available
Thermal Conductivity
Not Available
Critical Temperature
Not Available
Not Available
Thermal Expansion
Not Available
Enthalpy of Vaporization
Not Available
Enthalpy of Fusion
Not Available
Enthalpy of Atomization
Not Available
Standard Molar Entropy
Not Available