See also:
| » ChemGlobe: Thulium - Electronic, thermal, and steric data along with an isotope table. |
| » ChemicalElements.com: Thulium - Basic information, atomic structure, and isotopes. |
| » EnvironmentalChemistry.com: Thulium - Atomic structure, chemical and physical properties, and table of nuclides. |
| » It's Elemental: Thulium - Basic physical and historical information. |
| » LANL: Thulium - Basic information and history. |
| » Lenntech: Thulium - Physical data, chemical properties, health and environmental effects. |
| » Visual Elements: Thulium - Image, uses, physical information, and ionisation energies. |
| » WebElements: Thulium - Extensive information on history, uses, occurrence, compounds, and properties. |
| » Wikipedia: Thulium - Properties of the element, including its history, applications, and characteristics. |
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