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Tetraterbium heptaoxide (
) is a dark brown or black, hygroscopic powder, and is one of the main commercial compounds of the rare-earth metal terbium. It is commonly used as a raw material for producing other terbium compounds, a phosphor activator, a catalyst in chemical processes, and in magneto-optical recording materials.
Key Properties of
(approx. 4.27
m range)
- Formula:
- CAS Number: 12037-01-3
- Molecular Weight: 747.70 g/mol
- Appearance: Dark brown/black powder
- Solubility: Insoluble in water; soluble in mineral acids
- Melting Point: to
- Particle Size (Micron Range): Often available as micrometer-sized powders, such as 325 mesh (which is roughly equivalent to 44 m) or as specialized sub-micron/micron powders.
Common Applications
- Fluorescent Powders: Used as an activator for green phosphors in fluorescent lamps and TV screen phosphors.
- Catalysts: Acts as a redox catalyst in oxygen-involving reactions, similar to vanadium pentoxide.
- Magneto-Optics: Used in optical and laser-based devices, such as magneto-optical glasses and recording materials.
- Electronics: Utilized in high-efficiency lighting and data storage devices.
Safety and Handling
- Tetraterbium heptaoxide is generally considered a harmful, non-flammable powder, which may cause eye or skin irritation.
- It is categorized under "Rare Earth Metals" or "Inorganic Salts".
- Storage should be in a tightly closed container in a dry and ventilated place, typically in a, chemical-resistant environment.
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Tetraterbium Heptaoxide 4.27um. Terbium(III,IV) Oxide, occasionally called Tetraterbium Heptaoxide, has the formula Tb4O7, is a highly insoluble thermally ...