Registration Dossier

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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Administrative data

Endpoint:
melting point/freezing point
Type of information:
calculation (if not (Q)SAR)
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
data from handbook or collection of data

Data source

Reference
Reference Type:
review article or handbook
Title:
Gmelin Handbook - Rare Earth - C7
Year:
1984
Bibliographic source:
Gmelin Handbook

Materials and methods

Test guideline
Qualifier:
no guideline available
Principles of method if other than guideline:
calculated by Laptev and Soshchin
GLP compliance:
no
Type of method:
other: calculated

Test material

Constituent 1
Chemical structure
Reference substance name:
Digadolinium dioxide sulphide
EC Number:
235-598-4
EC Name:
Digadolinium dioxide sulphide
Cas Number:
12339-07-0
Molecular formula:
Gd2O2S
IUPAC Name:
digadolinium dioxide sulphide
Test material form:
solid: particulate/powder
Details on test material:
white , dry powder
strong smell (H2S)
Specific details on test material used for the study:
The melting point was calculated for gadolinium oxide sulfide. The dopant is present in only minor concentrations (<< 1%) and will thus not influence the melting point

Results and discussion

Melting / freezing point
Key result
Melting / freezing pt.:
2 265 °C
Atm. press.:
1 013 mBar

Applicant's summary and conclusion

Conclusions:
The melting point of Gd2O2S is calculated to 2265°C