Cordierite (Mg2[Al4O3(SiO3)5])

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:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: Study was conducted to an OECD equivalent guideline in an EU-based analytical laboratory. Sufficient detail was provided on the methodology and the results of the study.

Reason / purpose for cross-reference:

reference to other study

Qualifier:

equivalent or similar to guideline

Guideline:

OECD Guideline 102 (Melting point / Melting Range)

Deviations:

not applicable

Principles of method if other than guideline:

Differential Scanning Calorimetry

GLP compliance:

no

Type of method:

thermal analysis

Melting / freezing pt.:

1 460 °C

Remarks on result:

other: No pressure data was provided

The literature value for the melting point of cordierite varies the Concise Encyclopaedia of Advanced Ceramic Materials (Ed. R.J. Brook, Elsevier 2012 – see Google Books) states it is approximately 1460°C and that it melts incongruently to mullite and a liquid phase. It goes on to say that at temperatures close to melting point a number of solid solutions form and that a phase change occurs.

The onset around 1375°C could be due to phase changes in the sample with the onset at 1460°C due to the melting of the sample.

Conclusions:

The melting point was found to be 1,460°C.

Executive summary:

The melting point of the substance was determined using DSC in a method equivalent to OECD test guideline 102. The melting point was found to be 1,460°C.

Description of key information

The melting point was found to be 1,460°C.

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:

1 460 °C

Additional information

The melting point of the substance was determined using DSC in a method equivalent to OECD test guideline 102. The melting point was found to be 1,460°C.