Aluminium vanadium tetraoxide

Melting point / freezing point

Link to relevant study record(s)

Reference

Endpoint:

melting point/freezing point

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

comparable to guideline study with acceptable restrictions

Remarks:

purity, expiry date, batch number were not stated; accuracy was ± 5 °C instead of ± 2.0 °C

Qualifier:

equivalent or similar to guideline

Guideline:

OECD Guideline 102 (Melting point / Melting Range)

Version / remarks:

1995

Deviations:

yes

Remarks:

purity, expiry date, batch number were not stated; accuracy was ± 5 °C instead of ± 2.0 °C

GLP compliance:

not specified

Type of method:

thermal analysis

Decomposition:

yes

Decomp. temp.:

745 °C

Sublimation:

no

The verification of the Al₂O₃ -V₂O₅ phase diagram has proved that at the content of ~8 mol % Al₂O₃ and ~92 mol % V₂O₅, the components heated to ~ 640 °C form a eutectic: AlVO₄ + V₂O₅. AlVO₄ melts incongruently at 745 °C, releasing the solid α-Al₂O₃.

Conclusions:

Aluminium vanadium tetraoxide melts incongruently at 745 °C, releasing the solid α-Al2O3.

Description of key information

Aluminium vanadium tetraoxide melts incongruently at 745°C.