Properties of neptunium
Thermophysical properties for neptunium (CAS: 7439-99-8). Use the selector below to view properties in different unit systems.
Calculation Conditions
The following state-dependent properties were calculated at these standard conditions.
Temperature
25 °C
Pressure
1.01325 bar
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Open CalculatorIdentification
- AtomsNp: 1
- CAS7439-99-8
- FormulaNp
- ID7439-99-8
- InChINp
- InChI KeyLFNLGNPSGWYGGD-UHFFFAOYSA-N
- IUPAC Nameneptunium
- Molecular Weight (kg)237.05
- Phases
- PubChem ID2.3933e+4
- SMILES[Np]
- Synonyms
Physical Properties
- Acentric factor
- Critical pressure (bar)0
- Critical temperature (°C)-273.15
- Critical volume (m³/kmol)0
- Dipole moment
- Melting temperature (°C)644
- Normal boiling temperature (°C)3902
State-dependent Properties
- Compressibility factor4.7956e-4
- Density (kg/m³)2.0204e+4
- Dynamic viscosity (cP)0
- Enthalpy of vaporization (mass) (kJ)0
- Enthalpy of vaporization (molar) (kJ/kmol)
- Gibbs free energy (kJ/kmol)0
- Joule–Thomson coefficient
- Kinematic viscosity
- Molar enthalpy (kJ/kmol)0
- Molar entropy (kJ/(kmol·K))0
- Molar heat capacity (kJ/(kmol·K))10.4011
- Molar volume (m³/kmol)0.0117327
- Parachor
- Poynting correction factor
- Prandtl number
- Saturation pressure (bar)3.3038e-70
- Solubility parameter
- Specific enthalpy (kJ)0
- Specific entropy (kJ/kg·K)0
- Specific gravity20.2241
- Specific heat capacity (kJ/kg·K)0.0438771
- Surface tension
- Thermal conductivity
- Thermal diffusivity
Safety Properties
- Autoignition temperature (°C)-273.15
- Flash point temperature (°C)-273.15
- Lower flammability limit
- Upper flammability limit
Environmental Properties
- Global warming potential
- Ozone depletion potential
Failed Properties:
- API gravityFailed
- Saturation temperature (°C)Failed