Erdmannite (of Engström and Des Cloizeaux & Damour)
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About Erdmannite (of Engström and Des Cloizeaux & Damour)
An inadequately described borosilicate of Ca, Fe, Be, Th and REE with an intermediate composition between gadolinite and homilite.
A dark onion-green mineral from Stokkøya, Langesundsfjorden, Norway was analyzed by Engström (1877), the mineral was thought by him to be identical with Erdmannite (of Berlin). An analysis of a brown mineral from Stokkøya was published by Des Cloizeaux & Damour (1877), who suggested that it was an alteration product from homilite. Brøgger (1890) suggested that both minerals should be regarded as a cerhomilite. Ito and Hafner (1974) found the minerals to have intermediate compositions between gadolinite and homilite.
A dark onion-green mineral from Stokkøya, Langesundsfjorden, Norway was analyzed by Engström (1877), the mineral was thought by him to be identical with Erdmannite (of Berlin). An analysis of a brown mineral from Stokkøya was published by Des Cloizeaux & Damour (1877), who suggested that it was an alteration product from homilite. Brøgger (1890) suggested that both minerals should be regarded as a cerhomilite. Ito and Hafner (1974) found the minerals to have intermediate compositions between gadolinite and homilite.
Name Encoding
ASCII-7:
Erdmannite (of Engstrom and Des Cloizeaux & Damour)
Unique Identifiers
Mindat ID:
39982
Long-form identifier:
mindat:1:1:39982:1
Similar Names
Synonyms of Erdmannite (of Engström and Des Cloizeaux & Damour)
Other Information
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for Erdmannite (of Engström and Des Cloizeaux & Damour)
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References for Erdmannite (of Engström and Des Cloizeaux & Damour)
Localities for Erdmannite (of Engström and Des Cloizeaux & Damour)
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The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and further information on this occurrence.
? - Indicates mineral may be doubtful at this locality.
- Good crystals or important locality for species.
- World class for species or very significant.
(TL) - Type Locality for a valid mineral species.
(FRL) - First Recorded Locality for everything else (eg varieties).
All localities listed without proper references should be considered as questionable.
Norway | |
| Des Cloizeaux et al. (1877) +1 other reference |
Langesundsfjorden, Norway