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Melting point / freezing point

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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.