Terbium(III,IV) oxide

Terbium(III,IV) oxide

Names
IUPAC name Tetraterbium heptaoxide
Other names Terbium(III,IV) oxide, Terbium peroxide
Identifiers
CAS Number	12037-01-3 Y
3D model (JSmol)	Interactive image
ECHA InfoCard	100.031.675
PubChem CID	16211492
CompTox Dashboard (EPA)	DTXSID701027020 DTXSID40276469, DTXSID701027020
InChI InChI=1S/7O.4Tb
SMILES O=[Tb]O[Tb](=O)O[Tb](=O)O[Tb]=O
Properties
Chemical formula	Tb4O7
Molar mass	747.6972 g/mol
Appearance	Dark brown-black hygroscopic solid.
Density	7.3 g/cm3
Melting point	Decomposes to Tb2O3
Solubility in water	Insoluble
Hazards
Occupational safety and health (OHS/OSH):
Main hazards	Oxidising agent.
Related compounds
Other cations	Terbium(III) oxide Terbium(IV) oxide
Related compounds	Cerium(IV) oxide Praseodymium(III,IV) oxide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). N verify (what is YN ?) Infobox references

Terbium(III,IV) oxide, occasionally called tetraterbium heptaoxide, has the formula Tb₄O₇, though some texts refer to it as TbO_1.75. There is some debate as to whether it is a discrete compound, or simply one phase in an interstitial oxide system. Tb₄O₇ is one of the main commercial terbium compounds, and the only such product containing at least some Tb(IV) (terbium in the +4 oxidation state), along with the more stable Tb(III). It is produced by heating the metal oxalate, and it is used in the preparation of other terbium compounds. It is also used in Electronics and Data Storage, Green Energy Technologies, Medical Imaging and Diagnosis, and Chemical Processes.^[1] Terbium forms three other major oxides: Tb₂O₃, TbO₂, and Tb₆O₁₁.