91 Pa 231.036
Protactinium
actinide · Group 3 · Period 7
5 section(s) thin
Atomic properties
Atomic number
91
Z
Density
15.37 g/cm³
at STP
Melting point
1568 °C
at 1 atm
Boiling point
4027 °C
at 1 atm
Crystal structure
tetragonal
Electron config.
[Rn] 5f² 6d¹ 7s²
Oxidation states
+4, +5
most common
Market data
No tradeable futures market for Pa on Yahoo / Stooq. Live market data is
not available; pricing in this page is based on contract reference figures from
the source documents.
Moles per kilogram
| Compound | Formula | MW (g/mol) | Moles/kg |
|---|---|---|---|
| Protactinium Metal | Pa | 231.04 | 4.33 |
| Protactinium(V) Oxide | Pa₂O₅ | 542.07 | 1.84 |
| Protactinium(V) Fluoride | PaF₅ | 326.03 | 3.07 |
| Protactinium(V) Chloride | PaCl₅ | 408.30 | 2.45 |
| Protactinium(IV) Oxide | PaO₂ | 263.04 | 3.80 |
References
No citations on this page yet. References will appear here once enrichment runs.
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Coverage notes
The following sections are thin or absent in the source document for this element. They will be filled by enrichment passes (NIST atomic, OSHA/NIOSH safety, USGS / IAI environmental).
- Missing section: Raw Material Sources
- Missing section: Production Cost
- Missing section: Energy Consumption
- Missing section: Commercial Forms
- Missing section: Suppliers by Country