Technical data for Californium

Overview
NameCalifornium
SymbolCf
Atomic Number98
Atomic Weight251[note]
Density15.1 g/cm3
Melting Point900 °C
Boiling PointN/A

Thermal properties
PhaseSolid
Melting Point900 °C
Boiling PointN/A
Absolute Melting Point1173 K
Absolute Boiling PointN/A
Heat of FusionN/A
Heat of VaporizationN/A
Heat of CombustionN/A
Specific HeatN/A
Thermal ConductivityN/A
Thermal ExpansionN/A

Bulk physical properties
Density15.1 g/cm3
Density (Liquid)N/A
Molar Volume0.00001662
Thermal ConductivityN/A
Thermal ExpansionN/A

Reactivity
Valence4
Electronegativity1.3
ElectronAffinityN/A
Ionization Energies
608 kJ/mol

Health and Safety
Autoignition PointN/A
FlashpointN/A

Classifications
Alternate NamesNone
Nams of AllotropesNone
Blockf
GroupN/A
Period7
Electron Configuration[Rn]5f107s2
ColorN/A
Discovery
1950 in United States
Gas phaseN/A
CAS NumberCAS7440-71-3

Electrical properties
Electrical TypeN/A
Electrical ConductivityN/A
ResistivityN/A
Superconducting PointN/A

Magnetic properties
Magnetic TypeN/A
Curie PointN/A
Mass Magnetic SusceptibilityN/A
Molar Magnetic SusceptibilityN/A
Volume Magnetic SusceptibilityN/A

Abundances
% in UniverseN/A
% in SunNone
% in MeteoritesNone
% in Earth's CrustNone
% in OceansNone
% in HumansNone

Atomic dimensions and structure
Atomic RadiusN/A
Covalent RadiusN/A
Van der Waals RadiusN/A
Crystal StructureSimple Hexagonal
Lattice Angles
π/2, π/2, 2 π/3
Lattice Constants
338, 338, 1102.5 pm
Space Group NameP63/mmc
Space Group Number194

Nuclear Properties
Half-Life900.6 y
Lifetime1.3×103 y

Notes on the properties of Californium:
Atomic Weight: Atomic mass number given for longest lived isotope.