Terbium Oxide, Terbium Sesquioxide, Terbia, 12037-01-3

Terbium Oxide, Terbium Sesquioxide, Terbia, 12037-01-3

TERBIUM OXIDE (TB₄O₇)
TERBIUM OXIDE / TERBIA / TERBIUM(III,IV) OXIDE / TERBIUM SESQUIOXIDE
1. PRODUCT IDENTIFICATION AND CHEMICAL IDENTITY

2. CHEMICAL STRUCTURE
2.1. Molecular Structure
Terbium oxide is a mixed-valence oxide of the rare earth element terbium and oxygen. It contains both Tb³⁺ and Tb⁴⁺ ions. It has a cubic fluorite-like crystal structure. This mixed-valence structure gives the compound oxygen storage capacity, catalytic activity, and colorant properties. It is insoluble in water but soluble in strong acids.

Structural Features:

                    TERBIUM OXIDE [Tb₄O₇]
                          |
                Tb³⁺/Tb⁴⁺ - O²⁻ Ionic Bonds
                          |
        +----------------+----------------+
        |                |                |
    Cubic Fluorite     Brown-Black      Mixed Valence
    -like Structure    Powder Form      (Tb³⁺/Tb⁴⁺)

2.2. Structural Properties

3. PHYSICAL AND CHEMICAL PROPERTIES

4. PURITY GRADES

5. STABILITY AND REACTIVITY

5.1. Chemical Reactions

• Reaction with Acids:
  Tb₄O₇ + 14HCl → 4TbCl₃ + Cl₂↑ + 7H₂O
  Tb₄O₇ + 14HNO₃ → 4Tb(NO₃)₃ + 3NO₂↑ + 7H₂O

• Reduction (at High Temperature):
  Tb₄O₇ + H₂ → Tb₂O₃ + H₂O (reduction)

• Oxidation:
  Tb₄O₇ + O₂ → TbO₂ (at high temperature)

6. APPLICATION AREAS
6.1. Phosphors and Lighting

6.2. Glass and Ceramic Industry

6.3. Catalyst Applications

6.4. Electronics and Magneto-Optics

6.5. Metallurgy

6.6. Sectoral Suitability Table

7. PRODUCTION PROCESS

7.1. Major Producing Countries

8. ALTERNATIVE / SUBSTITUTE PRODUCTS

9. SAFETY AND TOXICOLOGY

9.1. GHS Classification

Signal Word: WARNING

Hazard Pictograms: GHS07 (Exclamation Mark)

10. PRECAUTIONARY STATEMENTS (P-CODES)

11. FIRST AID MEASURES

12. STORAGE AND SHELF LIFE

13. PACKAGING OPTIONS

14. TRANSPORT INFORMATION

15. REGULATORY STATUS

16. OTHER NAMES AND SYNONYMS

17. QUICK REFERENCE TABLE

18. CRITICAL WARNINGS AND BEST PRACTICES

CRITICAL WARNINGS:

• Mixed Valence Structure: Tb₄O₇ contains both Tb³⁺ and Tb⁴⁺ ions. This property gives the compound oxygen storage capacity, catalytic activity, and colorant properties.

• Phosphor Applications: Terbium-doped phosphors play a critical role in green light production in fluorescent lamps and LEDs.

• Oxygen Storage Capacity: Used in automotive catalytic converters and redox catalysts.

• High Purity Requirement: Phosphor, optical, and catalyst applications require high purity (>99.9%).

• Powder Hazard: Fine powder form may cause respiratory tract irritation. Dust control measures must be taken.

BEST PRACTICE RECOMMENDATIONS:

• Storage:

  • Store in a cool, dry, and well-ventilated area.

  • Use moisture-proof, tightly closed containers.

  • Keep away from acids and reducing agents.

  • Store at room temperature (15-25°C).

• Handling:

  • Use in well-ventilated areas with local exhaust ventilation.

  • Use a dust mask (N95 or better), protective goggles, and gloves.

  • Avoid dust formation and inhalation.

  • Wash hands thoroughly after handling.

  • For dissolution in acids, add oxide to acid slowly with cooling and stirring.

• Waste Management:

  • Dispose of in accordance with local regulations.

  • Do not discharge into water sources.

  • For large quantities, rare earth recycling and recovery should be considered.

LEGAL DISCLAIMER
This Technical Data Sheet (TDS) is for informational purposes only and has been prepared based on available technical data. The user is solely responsible for determining the suitability of the product for their specific applications and for complying with all local, national, and international regulations. For complete safety, storage, handling, transport, disposal, and regulatory compliance information, the official Safety Data Sheet (SDS/MSDS) provided by the manufacturer/supplier must be consulted. This document does not substitute professional advice. Terbium oxide is a critical rare earth material for phosphor, catalyst, and optical applications due to its mixed-valence structure; careful handling and storage are required due to high purity requirements.